ArrayDeque<A>

class ArrayDeque<A> with RIterableOnce<A>, RIterable<A>, RSeq<A>, IndexedSeq<A>, Buffer<A>

A mutable double-ended queue backed by a circular Array.

Amortized O(1) addOne / prepend at both ends and O(1) indexed access. The internal array is a power-of-two ring buffer that grows and shrinks automatically. MQueue and MStack are thin wrappers over ArrayDeque.

Construct with the default constructor (optionally passing an initial capacity hint) or with ArrayDeque.from / ArrayDeque.fromDart.

Mixed-in types

Implementers

Available Extensions

Constructors

ArrayDeque()

ArrayDeque([int size = DefaultInitialSize])

Implementation

dart

ArrayDeque([int size = DefaultInitialSize]) : this.internal(alloc(size), 0, 0);

ArrayDeque.internal()

ArrayDeque.internal(Array<A> array, int start, int end)

Implementation

dart

@protected
ArrayDeque.internal(this.array, this.start, this.end);

Properties

array read / write

Array<A> array

Implementation

dart

@protected
Array<A> array;

end read / write

int end

Implementation

dart

@protected
int end;

hashCode no setter inherited

int get hashCode

The hash code for this object.

A hash code is a single integer which represents the state of the object that affects operator == comparisons.

All objects have hash codes. The default hash code implemented by Object represents only the identity of the object, the same way as the default operator == implementation only considers objects equal if they are identical (see identityHashCode).

If operator == is overridden to use the object state instead, the hash code must also be changed to represent that state, otherwise the object cannot be used in hash based data structures like the default Set and Map implementations.

Hash codes must be the same for objects that are equal to each other according to operator ==. The hash code of an object should only change if the object changes in a way that affects equality. There are no further requirements for the hash codes. They need not be consistent between executions of the same program and there are no distribution guarantees.

Objects that are not equal are allowed to have the same hash code. It is even technically allowed that all instances have the same hash code, but if clashes happen too often, it may reduce the efficiency of hash-based data structures like HashSet or HashMap.

If a subclass overrides hashCode, it should override the operator == operator as well to maintain consistency.

Inherited from RSeq.

Implementation

dart

@override
int get hashCode => MurmurHash3.seqHash(this);

head no setter inherited

A get head

Returns the first element of this collection, or throws if it is empty.

Inherited from RIterable.

Implementation

dart

A get head => iterator.next();

headOption no setter inherited

Option<A> get headOption

Returns the first element of this collection as a Some if non-empty. If this collction is empty, None is returned.

Inherited from RIterable.

Implementation

dart

Option<A> get headOption {
  final it = iterator;
  return Option.when(() => it.hasNext, () => it.next());
}

init no setter override

ArrayDeque<A> get init

Returns all elements from this collection except the last. If this collection is empty, an empty collection is returned.

Implementation

dart

@override
ArrayDeque<A> get init => from(super.init);

inits no setter override

RIterator<ArrayDeque<A>> get inits

Returns an iterator of all potential tails of this collection, starting with the entire collection and ending with an empty one.

Implementation

dart

@override
RIterator<ArrayDeque<A>> get inits => super.inits.map(from);

isEmpty no setter override

bool get isEmpty

Whether this collection contains no elements.

Implementation

dart

@override
bool get isEmpty => start == end;

isNotEmpty no setter inherited

bool get isNotEmpty

Whether this collection contains at least one element.

Inherited from RIterableOnce.

Implementation

dart

bool get isNotEmpty => !isEmpty;

isTraversableAgain no setter inherited

bool get isTraversableAgain

Whether this collection can be traversed more than once.

Always false for a bare RIterableOnce; overridden to true by RIterable and its subtypes.

Inherited from RIterableOnce.

Implementation

dart

bool get isTraversableAgain => false;

iterator no setter override

RIterator<A> get iterator

Returns an RIterator over the elements of this collection.

Implementation

dart

@override
RIterator<A> get iterator => _ArrayDequeIterator(this, 0, () => 0);

knownSize no setter override

int get knownSize

Returns the number of elements in this collection, if that number is already known. If not, -1 is returned.

Implementation

dart

@override
int get knownSize => length;

last no setter inherited

A get last

Returns the last element of this collection, or throws if it is empty.

Inherited from RIterable.

Implementation

dart

A get last {
  final it = iterator;
  var lst = it.next();

  while (it.hasNext) {
    lst = it.next();
  }

  return lst;
}

lastOption no setter inherited

Option<A> get lastOption

Returns the last element of this collection as a Some, or None if this collection is empty.

Inherited from RIterable.

Implementation

dart

Option<A> get lastOption {
  if (isEmpty) {
    return none();
  } else {
    final it = iterator;
    var last = it.next();

    while (it.hasNext) {
      last = it.next();
    }

    return Some(last);
  }
}

length no setter override

int get length

The number of elements in this sequence.

Implementation

dart

@override
int get length => _endMinus(start);

nonEmpty no setter inherited

bool get nonEmpty

Whether this collection contains at least one element.

Inherited from RIterableOnce.

Implementation

dart

bool get nonEmpty => !isEmpty;

runtimeType no setter inherited

Type get runtimeType

A representation of the runtime type of the object.

Inherited from Object.

Implementation

dart

external Type get runtimeType;

size no setter inherited

int get size

Returns the number of elements in this collection.

Inherited from RSeq.

Implementation

dart

@override
int get size => length;

start read / write

int start

Implementation

dart

@protected
int start;

tail no setter override

ArrayDeque<A> get tail

Returns a new collection with the first element removed. If this collection is empty, an empty collection is returned.

Implementation

dart

@override
ArrayDeque<A> get tail => from(super.tail);

tails no setter override

RIterator<ArrayDeque<A>> get tails

Returns an iterator of all potential tails of this collection, starting with the entire collection and ending with an empty one.

Implementation

dart

@override
RIterator<ArrayDeque<A>> get tails => super.tails.map(from);

Methods

addAll() override

ArrayDeque<A> addAll(RIterableOnce<A> elems)

Appends all elems and returns this.

Implementation

dart

@override
ArrayDeque<A> addAll(RIterableOnce<A> elems) {
  final srcLength = elems.knownSize;

  if (srcLength > 0) {
    _ensureSize(srcLength + length);
    elems.iterator.foreach(_appendAssumingCapacity);
  } else {
    elems.iterator.foreach(addOne);
  }

  return this;
}

addOne() override

ArrayDeque<A> addOne(A elem)

Appends elem and returns this.

Implementation

dart

@override
ArrayDeque<A> addOne(A elem) {
  _ensureSize(length + 1);
  return _appendAssumingCapacity(elem);
}

append() override

ArrayDeque<A> append(A elem)

Alias for addOne.

Implementation

dart

@override
ArrayDeque<A> append(A elem) => from(super.append(elem));

appendAll() override

ArrayDeque<A> appendAll(RIterableOnce<A> elems)

Alias for addAll.

Implementation

dart

@override
ArrayDeque<A> appendAll(RIterableOnce<A> elems) => from(super.appendAll(elems));

appended() override

ArrayDeque<A> appended(A elem)

Returns a new Seq, with the given elem added to the end.

Implementation

dart

@override
ArrayDeque<A> appended(A elem) => from(super.appended(elem));

appendedAll() override

ArrayDeque<A> appendedAll(RIterableOnce<A> suffix)

Returns a new Seq, with elems added to the end.

Implementation

dart

@override
ArrayDeque<A> appendedAll(RIterableOnce<A> suffix) => from(super.appendedAll(suffix));

canEqual() inherited

bool canEqual(Object other)

Inherited from IndexedSeq.

Implementation

dart

@override
bool canEqual(Object other) => switch (other) {
  final RSeq<A> that => length == that.length && super.canEqual(that),
  _ => super.canEqual(other),
};

clear() override

void clear()

Removes all elements from this buffer.

Implementation

dart

@override
void clear() {
  while (nonEmpty) {
    _removeHeadAssumingNonEmpty();
  }
}

collect() override

ArrayDeque<B> collect<B>(Option<B> Function(A) f)

Returns a new collection by applying f to each element an only keeping results of type Some.

Implementation

dart

@override
ArrayDeque<B> collect<B>(Function1<A, Option<B>> f) => from(super.collect(f));

collectFirst() inherited

Option<B> collectFirst<B>(Option<B> Function(A) f)

Applies f to each element of this collection, returning the first element that results in a Some, if any.

Inherited from RIterableOnce.

Implementation

dart

Option<B> collectFirst<B>(Function1<A, Option<B>> f) {
  final it = iterator;

  while (it.hasNext) {
    final x = f(it.next());
    if (x.isDefined) return x;
  }

  return none();
}

combinations() override

RIterator<ArrayDeque<A>> combinations(int n)

Returns an Iterator that will produce all combinations of elements from this sequence of size n in order.

Given the list [1, 2, 2, 2], combinations of size 2 would result in [1, 2] and [2, 2]. Note that [2, 1] would not be included since combinations are taken from element in order.

Also note from the example above, [1, 2] would only be included once even though there are technically 3 ways to generate a combination of [1, 2], only one will be included in the result since the other 2 are duplicates.

Implementation

dart

@override
RIterator<ArrayDeque<A>> combinations(int n) => super.combinations(n).map(from);

concat() override

ArrayDeque<A> concat(RIterableOnce<A> suffix)

Returns a copy of this collection, with elems added to the end.

Implementation

dart

@override
ArrayDeque<A> concat(covariant RIterableOnce<A> suffix) => from(super.concat(suffix));

contains() inherited

bool contains(A elem)

Returns true, if any element of this collection equals elem.

Inherited from RSeq.

Implementation

dart

bool contains(A elem) => exists((a) => a == elem);

containsSlice() inherited

bool containsSlice(RSeq<A> that)

Returns true if that is contained in this collection, in order.

Inherited from RSeq.

Implementation

dart

bool containsSlice(RSeq<A> that) => indexOfSlice(that).isDefined;

copyToArray() inherited

int copyToArray(Array<A> xs, [int start = 0, int? n])

Copies elements into xs starting at start, writing at most n elements (or all remaining capacity when n is omitted).

Returns the number of elements actually copied.

Inherited from RIterableOnce.

Implementation

dart

int copyToArray(Array<A> xs, [int start = 0, int? n]) {
  final it = iterator;
  final end = start + min(n ?? Integer.maxValue, xs.length - start);
  var i = start;

  while (i < end && it.hasNext) {
    xs[i] = it.next();
    i += 1;
  }

  return i - start;
}

corresponds() inherited

bool corresponds<B>(RIterable<B> that, bool Function(A, B) p)

Returns true if this collection has the same size as that and each corresponding element from this and that satisfies the given predicate p.

Inherited from RIterableOnce.

Implementation

dart

bool corresponds<B>(
  covariant RIterable<B> that,
  Function2<A, B, bool> p,
) {
  final a = iterator;
  final b = that.iterator;

  while (a.hasNext && b.hasNext) {
    if (!p(a.next(), b.next())) return false;
  }

  return !a.hasNext && !b.hasNext;
}

count() inherited

int count(bool Function(A) p)

Return the number of elements in this collection that satisfy the given predicate.

Inherited from RIterableOnce.

Implementation

dart

int count(Function1<A, bool> p) {
  var res = 0;
  final it = iterator;

  while (it.hasNext) {
    if (p(it.next())) res += 1;
  }

  return res;
}

diff() override

ArrayDeque<A> diff(RSeq<A> that)

Returns a new collection with the difference of this and that, i.e. all elements that appear in only this collection.

Implementation

dart

@override
ArrayDeque<A> diff(RSeq<A> that) => from(super.diff(that));

distinct() override

ArrayDeque<A> distinct()

Returns a new collection where every element is distinct according to equality.

Implementation

dart

@override
ArrayDeque<A> distinct() => from(super.distinct());

distinctBy() override

ArrayDeque<A> distinctBy<B>(B Function(A) f)

Returns a new collection where every element is distinct according to the application of f to each element.

Implementation

dart

@override
ArrayDeque<A> distinctBy<B>(Function1<A, B> f) => from(super.distinctBy(f));

drop() override

ArrayDeque<A> drop(int n)

Returns a new collection with the first n elements removed.

Implementation

dart

@override
ArrayDeque<A> drop(int n) => from(super.drop(n));

dropInPlace() override

ArrayDeque<A> dropInPlace(int n)

Removes the first n elements in place and returns this.

Implementation

dart

@override
ArrayDeque<A> dropInPlace(int n) => from(super.dropInPlace(n));

dropRight() override

ArrayDeque<A> dropRight(int n)

Return a new collection with the last n elements removed.

Implementation

dart

@override
ArrayDeque<A> dropRight(int n) => from(super.dropRight(n));

dropRightInPlace() override

ArrayDeque<A> dropRightInPlace(int n)

Removes the last n elements in place and returns this.

Implementation

dart

@override
ArrayDeque<A> dropRightInPlace(int n) => from(super.dropRightInPlace(n));

dropWhile() override

ArrayDeque<A> dropWhile(bool Function(A) p)

Returns a new collection with leading elements satisfying p removed.

Implementation

dart

@override
ArrayDeque<A> dropWhile(Function1<A, bool> p) => from(super.dropWhile(p));

dropWhileInPlace() override

ArrayDeque<A> dropWhileInPlace(bool Function(A) p)

Removes leading elements satisfying p in place and returns this.

Implementation

dart

@override
ArrayDeque<A> dropWhileInPlace(Function1<A, bool> p) => from(super.dropWhileInPlace(p));

endsWith() inherited

bool endsWith(RIterable<A> that)

Returns true if the end of this collection has the same elements in order as that. Otherwise, false is returned.

Inherited from RSeq.

Implementation

dart

bool endsWith(RIterable<A> that) {
  if (that.isEmpty) {
    return true;
  } else {
    final i = iterator.drop(length - that.size);
    final j = that.iterator;
    while (i.hasNext && j.hasNext) {
      if (i.next() != j.next()) return false;
    }

    return !j.hasNext;
  }
}

exists() inherited

bool exists(bool Function(A) p)

Returns true if any element of this collection satisfies the given predicate, false if no elements satisfy it.

Inherited from RIterableOnce.

Implementation

dart

bool exists(Function1<A, bool> p) {
  var res = false;
  final it = iterator;

  while (!res && it.hasNext) {
    res = p(it.next());
  }

  return res;
}

filter() override

ArrayDeque<A> filter(bool Function(A) p)

Returns a new collection containing only elements that satisfy p.

Implementation

dart

@override
ArrayDeque<A> filter(Function1<A, bool> p) {
  return from(super.filter(p));
}

filterNot() override

ArrayDeque<A> filterNot(bool Function(A) p)

Returns a new collection containing only elements that do not satisfy p.

Implementation

dart

@override
ArrayDeque<A> filterNot(Function1<A, bool> p) => from(super.filterNot(p));

find() inherited

Option<A> find(bool Function(A) p)

Returns the first element from this collection that satisfies the given predicate p. If no element satisfies p, None is returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> find(Function1<A, bool> p) {
  final it = iterator;

  while (it.hasNext) {
    final a = it.next();
    if (p(a)) return Some(a);
  }

  return none();
}

findLast() inherited

Option<A> findLast(bool Function(A) p)

Returns the last element satisfying p as Some, or None if none.

Inherited from RSeq.

Implementation

dart

Option<A> findLast(Function1<A, bool> p) {
  final it = reverseIterator();
  while (it.hasNext) {
    final elem = it.next();
    if (p(elem)) return Some(elem);
  }

  return none();
}

flatMap() override

ArrayDeque<B> flatMap<B>(RIterableOnce<B> Function(A) f)

Returns a new collection by applying f to each element and concatenating the results.

Implementation

dart

@override
ArrayDeque<B> flatMap<B>(covariant Function1<A, RIterableOnce<B>> f) => from(super.flatMap(f));

fold() inherited

A fold(A init, A Function(A, A) op)

Alias for foldLeft with a same-type accumulator.

Inherited from RIterable.

Implementation

dart

A fold(A init, Function2<A, A, A> op) => foldLeft(init, op);

foldLeft() inherited

B foldLeft<B>(B z, B Function(B, A) op)

Returns a summary value by applying op to all elements of this collection, moving from left to right. The fold uses a seed value of z.

Inherited from RIterableOnce.

Implementation

dart

B foldLeft<B>(B z, Function2<B, A, B> op) {
  var result = z;
  final it = iterator;

  while (it.hasNext) {
    result = op(result, it.next());
  }

  return result;
}

foldRight() inherited

B foldRight<B>(B z, B Function(A, B) op)

Returns a summary value by applying op to all elements of this collection, moving from right to left. The fold uses a seed value of z.

Inherited from RIterableOnce.

Implementation

dart

B foldRight<B>(B z, Function2<A, B, B> op) => _reversed().foldLeft(z, (b, a) => op(a, b));

forall() inherited

bool forall(bool Function(A) p)

Returns true if all elements of this collection satisfy the given predicate, false if any elements do not.

Inherited from RIterableOnce.

Implementation

dart

bool forall(Function1<A, bool> p) {
  var res = true;
  final it = iterator;

  while (res && it.hasNext) {
    res = p(it.next());
  }

  return res;
}

foreach() inherited

void foreach<U>(U Function(A) f)

Applies f to each element of this collection, discarding any resulting values.

Inherited from RIterableOnce.

Implementation

dart

void foreach<U>(Function1<A, U> f) {
  final it = iterator;
  while (it.hasNext) {
    f(it.next());
  }
}

groupBy() override

IMap<K, ArrayDeque<A>> groupBy<K>(K Function(A) f)

Partitions all elements of this collection by applying f to each element and accumulating duplicate keys in the returned IMap.

Implementation

dart

@override
IMap<K, ArrayDeque<A>> groupBy<K>(Function1<A, K> f) => super.groupBy(f).mapValues(from);

grouped() override

RIterator<ArrayDeque<A>> grouped(int size)

Returns a new iterator where each element is a collection of size elements from the original collection. The last element may contain less than size elements.

Implementation

dart

@override
RIterator<ArrayDeque<A>> grouped(int size) => super.grouped(size).map(from);

groupMap() override

IMap<K, ArrayDeque<B>> groupMap<K, B>(K Function(A) key, B Function(A) f)

Creates a new map by generating a key-value pair for each elements of this collection using key and f. Any elements that generate the same key will have the resulting values accumulated in the returned map.

Implementation

dart

@override
IMap<K, ArrayDeque<B>> groupMap<K, B>(Function1<A, K> key, Function1<A, B> f) =>
    super.groupMap(key, f).mapValues(from);

groupMapReduce() inherited

IMap<K, B> groupMapReduce<K, B>(
  K Function(A) key,
  B Function(A) f,
  B Function(B, B) reduce,
)

Partitions all elements of this collection by applying key to each element. Additionally f is applied to each element to generate a value. If multiple values are generating for the same key, those values will be combined using reduce.

Inherited from RIterable.

Implementation

dart

IMap<K, B> groupMapReduce<K, B>(
  Function1<A, K> key,
  Function1<A, B> f,
  Function2<B, B, B> reduce,
) {
  final m = <K, B>{};

  foreach((elem) {
    m.update(key(elem), (b) => reduce(b, f(elem)), ifAbsent: () => f(elem));
  });

  return IMap.fromDart(m);
}

indexOf() inherited

Option<int> indexOf(A elem, [int from = 0])

Returns the first index, if any, where the element at that index equals elem. If no index contains elem, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> indexOf(A elem, [int from = 0]) => indexWhere((a) => a == elem, from);

indexOfSlice() inherited

Option<int> indexOfSlice(RSeq<A> that, [int from = 0])

Finds the first index in this collection where the next sequence of elements is equal to that. If that cannot be found in this collection, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> indexOfSlice(RSeq<A> that, [int from = 0]) {
  if (that.isEmpty && from == 0) {
    return const Some(0);
  } else {
    final l = knownSize;
    final tl = that.knownSize;

    if (l >= 0 && tl >= 0) {
      final clippedFrom = max(0, from);
      if (from > l) {
        return none();
      } else if (tl < 1) {
        return Some(clippedFrom);
      } else if (l < tl) {
        return none();
      } else {
        return _kmpSearch(this, clippedFrom, l, that, 0, tl, true);
      }
    } else {
      var i = from;
      var s = drop(i);
      while (s.nonEmpty) {
        if (s.startsWith(that)) return Some(i);

        i += 1;
        s = s.tail;
      }
      return none();
    }
  }
}

indexWhere() inherited

Option<int> indexWhere(bool Function(A) p, [int from = 0])

Returns the index of the first element that satisfies the predicate p. If no element satisfies, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> indexWhere(Function1<A, bool> p, [int from = 0]) => iterator.indexWhere(p, from);

indices() inherited

Range indices()

Returns a range of all indices of this sequence

Will force evaluation.

Inherited from RSeq.

Implementation

dart

Range indices() => Range.exclusive(0, length);

insert() override

void insert(int idx, A elem)

Inserts elem at position idx, shifting later elements right.

Implementation

dart

@override
void insert(int idx, A elem) {
  _requireBounds(idx, length + 1);
  final n = length;

  if (idx == 0) {
    prepend(elem);
  } else if (idx == n) {
    addOne(elem);
  } else {
    final finalLength = n + 1;
    if (_mustGrow(finalLength)) {
      final array2 = ArrayDeque.alloc<A>(finalLength);
      _copySliceToArray(0, array2, 0, idx);
      array2[idx] = elem;
      _copySliceToArray(idx, array2, idx + 1, n);
      _reset(array2, 0, finalLength);
    } else if (n <= idx * 2) {
      var i = n - 1;
      while (i >= idx) {
        _set(i + 1, _get(i));
        i -= 1;
      }
      end = _endPlus(1);
      i += 1;
      _set(i, elem);
    } else {
      var i = 0;
      while (i < idx) {
        _set(i - 1, _get(i));
        i += 1;
      }
      start = _startMinus(1);
      _set(i, elem);
    }
  }
}

insertAll() override

void insertAll(int idx, RIterableOnce<A> elems)

Inserts all elems starting at position idx.

Implementation

dart

@override
void insertAll(int idx, RIterableOnce<A> elems) {
  _requireBounds(idx, length + 1);
  final n = length;

  if (idx == 0) {
    prependAll(elems);
  } else if (idx == n) {
    addAll(elems);
  } else {
    final RIterator<A> it;
    final int srcLength;

    if (elems.knownSize >= 0) {
      it = elems.iterator;
      srcLength = elems.knownSize;
    } else {
      final indexed = IndexedSeq.from(elems);
      it = indexed.iterator;
      srcLength = indexed.size;
    }

    if (it.nonEmpty) {
      final finalLength = srcLength + n;

      &#47;&#47; Either we resize right away or move prefix left or suffix right
      if (_mustGrow(finalLength)) {
        final array2 = ArrayDeque.alloc<A>(finalLength);
        _copySliceToArray(0, array2, 0, idx);

        final copied = it.copyToArray(array2, idx);
        assert(copied == srcLength);

        _copySliceToArray(idx, array2, idx + srcLength, n);
        _reset(array2, 0, finalLength);
      } else if (2 * idx >= n) {
        &#47;&#47; Cheaper to shift the suffix right
        var i = n - 1;
        while (i >= idx) {
          _set(i + srcLength, _get(i));
          i -= 1;
        }
        end = _endPlus(srcLength);
        while (it.hasNext) {
          i += 1;
          _set(i, it.next());
        }
      } else {
        &#47;&#47; Cheaper to shift prefix left
        var i = 0;
        while (i < idx) {
          _set(i - srcLength, _get(i));
          i += 1;
        }
        start = _startMinus(srcLength);
        while (it.hasNext) {
          _set(i, it.next());
          i += 1;
        }
      }
    }
  }
}

intersect() override

ArrayDeque<A> intersect(RSeq<A> that)

Returns a new collection with the intersection of this and that, i.e. all elements that appear in both collections.

Implementation

dart

@override
ArrayDeque<A> intersect(RSeq<A> that) => from(super.intersect(that));

intersperse() override

ArrayDeque<A> intersperse(A x)

Returns a new collection with sep inserted between each element.

Implementation

dart

@override
ArrayDeque<A> intersperse(A x) => from(super.intersperse(x));

isDefinedAt() inherited

bool isDefinedAt(int idx)

Returns true if this collection has an element at the given idx.

Inherited from RSeq.

Implementation

dart

bool isDefinedAt(int idx) => 0 <= idx && idx < size;

lastIndexOf() inherited

Option<int> lastIndexOf(A elem, [int end = 2147483647])

Returns the last index, if any, where the element at that index equals elem. If no index contains elem, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> lastIndexOf(A elem, [int end = 2147483647]) => lastIndexWhere((a) => a == elem, end);

lastIndexOfSlice() inherited

Option<int> lastIndexOfSlice(RSeq<A> that, [int end = 2147483647])

Finds the last index in this collection where the next sequence of elements is equal to that. If that cannot be found in this collection, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> lastIndexOfSlice(RSeq<A> that, [int end = 2147483647]) {
  final l = length;
  final tl = that.length;
  final clippedL = min(l - tl, end);

  if (end < 0) {
    return none();
  } else if (tl < 1) {
    return Some(clippedL);
  } else if (l < tl) {
    return none();
  } else {
    return _kmpSearch(this, 0, clippedL + tl, that, 0, tl, false);
  }
}

lastIndexWhere() inherited

Option<int> lastIndexWhere(bool Function(A) p, [int end = 2147483647])

Returns the index of the last element that satisfies the predicate p. If no element satisfies, None is returned.

Inherited from RSeq.

Implementation

dart

Option<int> lastIndexWhere(Function1<A, bool> p, [int end = 2147483647]) {
  var i = length - 1;
  final it = reverseIterator();

  while (it.hasNext) {
    final elem = it.next();

    if (i < end && p(elem)) return Some(i);

    i -= 1;
  }

  return none();
}

lift() inherited

Option<A> lift(int ix)

Returns the element at index ix as a Some. If ix is outside the range of this collection, None is returned.

Inherited from RSeq.

Implementation

dart

Option<A> lift(int ix) => Option.when(() => isDefinedAt(ix), () => this[ix]);

map() inherited

RSeq<B> map<B>(B Function(A) f)

Returns a new collection by applying f to each element.

Inherited from RSeq.

Implementation

dart

@override
RSeq<B> map<B>(Function1<A, B> f) => seqviews.Map(this, f).toSeq();

maxByOption() inherited

Option<A> maxByOption<B>(B Function(A) f, Order<B> order)

Finds the largest element in this collection by applying f to each element and using the given Order to find the greatest.

If this collection is empty, None is returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> maxByOption<B>(Function1<A, B> f, Order<B> order) => _minMaxByOption(f, order.max);

maxOption() inherited

Option<A> maxOption(Order<A> order)

Finds the largest element in this collection according to the given Order.

If this collection is empty, None is returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> maxOption(Order<A> order) => switch (knownSize) {
  0 => none(),
  _ => _reduceOptionIterator(iterator, order.max),
};

minByOption() inherited

Option<A> minByOption<B>(B Function(A) f, Order<B> order)

Finds the smallest element in this collection by applying f to each element and using the given Order to find the greatest.

If this collection is empty, None is returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> minByOption<B>(Function1<A, B> f, Order<B> order) => _minMaxByOption(f, order.min);

minOption() inherited

Option<A> minOption(Order<A> order)

Finds the largest element in this collection according to the given Order.

If this collection is empty, None is returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> minOption(Order<A> order) => switch (knownSize) {
  0 => none(),
  _ => _reduceOptionIterator(iterator, order.min),
};

mkString() inherited

String mkString({String? start, String? sep, String? end})

Returns a String by using each elements toString(), adding sep between each element. If start is defined, it will be prepended to the resulting string. If end is defined, it will be appended to the resulting string.

Inherited from RIterableOnce.

Implementation

dart

String mkString({String? start, String? sep, String? end}) {
  if (knownSize == 0) {
    return '${start ?? ""}${end ?? ""}';
  } else {
    return _mkStringImpl(StringBuffer(), start ?? '', sep ?? '', end ?? '');
  }
}

noSuchMethod() inherited

dynamic noSuchMethod(Invocation invocation)

Invoked when a nonexistent method or property is accessed.

A dynamic member invocation can attempt to call a member which doesn't exist on the receiving object. Example:

dart

dynamic object = 1;
object.add(42); // Statically allowed, run-time error

This invalid code will invoke the noSuchMethod method of the integer 1 with an Invocation representing the .add(42) call and arguments (which then throws).

Classes can override noSuchMethod to provide custom behavior for such invalid dynamic invocations.

A class with a non-default noSuchMethod invocation can also omit implementations for members of its interface. Example:

dart

class MockList<T> implements List<T> {
  noSuchMethod(Invocation invocation) {
    log(invocation);
    super.noSuchMethod(invocation); // Will throw.
  }
}
void main() {
  MockList().add(42);
}

This code has no compile-time warnings or errors even though the MockList class has no concrete implementation of any of the List interface methods. Calls to List methods are forwarded to noSuchMethod, so this code will log an invocation similar to Invocation.method(#add, [42]) and then throw.

If a value is returned from noSuchMethod, it becomes the result of the original invocation. If the value is not of a type that can be returned by the original invocation, a type error occurs at the invocation.

The default behavior is to throw a NoSuchMethodError.

Inherited from Object.

Implementation

dart

@pragma("vm:entry-point")
@pragma("wasm:entry-point")
external dynamic noSuchMethod(Invocation invocation);

padTo() override

ArrayDeque<A> padTo(int len, A elem)

Returns a new collection with a length of at least len.

If this collection is shorter than len, the returned collection will have size len and elem will be used for each new element needed to reach that size.

If this collection is already at least len in size, this collection will be returned.

Implementation

dart

@override
ArrayDeque<A> padTo(int len, A elem) => from(super.padTo(len, elem));

padToInPlace() override

ArrayDeque<A> padToInPlace(int len, A elem)

Appends elem until length equals len, then returns this.

Implementation

dart

@override
ArrayDeque<A> padToInPlace(int len, A elem) => from(super.padToInPlace(len, elem));

partition() override

Record partition(bool Function(A) p)

Returns 2 collections as a tuple where the first tuple element will be a collection of elements that satisfy the given predicate p. The second item of the returned tuple will be elements that do not satisfy p.

Implementation

dart

@override
(ArrayDeque<A>, ArrayDeque<A>) partition(Function1<A, bool> p) {
  final (a, b) = super.partition(p);
  return (from(a), from(b));
}

partitionMap() override

Record partitionMap<A1, A2>(Either<A1, A2> Function(A) f)

Applies f to each element of this collection and returns a separate collection for all applications resulting in a Left and Right respectively.

Implementation

dart

@override
(ArrayDeque<A1>, ArrayDeque<A2>) partitionMap<A1, A2>(Function1<A, Either<A1, A2>> f) {
  final (a, b) = super.partitionMap(f);
  return (from(a), from(b));
}

patch() override

ArrayDeque<A> patch(int from, RIterableOnce<A> other, int replaced)

Returns a new collection with replaced elements starting at from replaced by the elements of other.

Implementation

dart

@override
ArrayDeque<A> patch(int from, RIterableOnce<A> other, int replaced) =>
    ArrayDeque.from(super.patch(from, other, replaced));

patchInPlace() override

ArrayDeque<A> patchInPlace(int from, RIterableOnce<A> patch, int replaced)

Replaces replaced elements starting at from with patch in place.

Implementation

dart

@override
ArrayDeque<A> patchInPlace(int from, RIterableOnce<A> patch, int replaced) {
  final replaced0 = min(max(replaced, 0), length);
  final i = min(max(from, 0), length);
  var j = 0;
  final iter = patch.iterator;

  while (iter.hasNext && j < replaced0 && i + j < length) {
    update(i + j, iter.next());
    j += 1;
  }

  if (iter.hasNext) {
    insertAll(i + j, iter);
  } else if (j < replaced0) {
    removeN(i + j, min(replaced0 - j, length - i - j));
  }

  return this;
}

permutations() inherited

RIterator<IndexedSeq<A>> permutations()

Returns an Iterator that will emit all possible permutations of the elements in this collection.

Note that only distinct permutations are emitted. Given the example [1, 2, 2, 2] the permutations will only include [1, 2, 2, 2] once, even though there are 3 different way to generate that permutation.

Inherited from IndexedSeq.

Implementation

dart

@override
RIterator<IndexedSeq<A>> permutations() => super.permutations().map((a) => a.toIndexedSeq());

prepend() override

ArrayDeque<A> prepend(A elem)

Prepends elem and returns this.

Implementation

dart

@override
ArrayDeque<A> prepend(A elem) {
  _ensureSize(length + 1);
  return _prependAssumingCapacity(elem);
}

prependAll() override

ArrayDeque<A> prependAll(RIterableOnce<A> elems)

Prepends all elems and returns this.

Implementation

dart

@override
ArrayDeque<A> prependAll(RIterableOnce<A> elems) {
  final it = elems.iterator;

  if (it.nonEmpty) {
    final n = length;

    final srcLength = elems.knownSize;

    if (srcLength < 0) {
      return prependAll(it.toIndexedSeq());
    } else if (_mustGrow(srcLength + n)) {
      final finalLength = srcLength + n;
      final array2 = ArrayDeque.alloc<A>(finalLength);

      final copied = it.copyToArray(array2);
      assert(copied == srcLength);

      _copySliceToArray(0, array2, srcLength, n);
      _reset(array2, 0, finalLength);
    } else {
      var i = 0;

      while (i < srcLength) {
        _set(i - srcLength, it.next());
        i += 1;
      }

      start = _startMinus(srcLength);
    }
  }

  return this;
}

prepended() inherited

IndexedSeq<A> prepended(A elem)

Returns a new collection with elem added to the beginning.

Inherited from IndexedSeq.

Implementation

dart

@override
IndexedSeq<A> prepended(A elem) => super.prepended(elem).toIndexedSeq();

prependedAll() inherited

IndexedSeq<A> prependedAll(RIterableOnce<A> prefix)

Returns a new collection with all elems added to the beginning.

Inherited from IndexedSeq.

Implementation

dart

@override
IndexedSeq<A> prependedAll(RIterableOnce<A> prefix) => super.prependedAll(prefix).toIndexedSeq();

reduce() inherited

A reduce(A Function(A, A) op)

Reduces this collection to a single value by applying op left to right.

Throws if the collection is empty.

Inherited from RIterableOnce.

Implementation

dart

A reduce(Function2<A, A, A> op) => reduceLeft(op);

reduceLeft() inherited

A reduceLeft(A Function(A, A) op)

Reduces from left to right. Throws if empty.

Inherited from RIterableOnce.

Implementation

dart

A reduceLeft(Function2<A, A, A> op) => switch (this) {
  final IndexedSeq<A> seq when seq.length > 0 => _foldl(seq, 1, seq[0], op),
  _ when knownSize == 0 => throw UnsupportedError('empty.reduceLeft'),
  _ => _reduceLeftIterator(() => throw UnsupportedError('empty.reduceLeft'), op),
};

reduceLeftOption() inherited

Option<A> reduceLeftOption(A Function(A, A) op)

Returns a summary values of all elements of this collection by applying f to each element, moving left to right.

If this collection is empty, None will be returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> reduceLeftOption(Function2<A, A, A> op) => switch (knownSize) {
  0 => none(),
  _ => _reduceOptionIterator(iterator, op),
};

reduceOption() inherited

Option<A> reduceOption(A Function(A, A) op)

Returns a summary values of all elements of this collection by applying f to each element, moving left to right.

If this collection is empty, None will be returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> reduceOption(Function2<A, A, A> op) => reduceLeftOption(op);

reduceRight() inherited

A reduceRight(A Function(A, A) op)

Reduces from right to left. Throws if empty.

Inherited from RIterableOnce.

Implementation

dart

A reduceRight(Function2<A, A, A> op) => switch (this) {
  final IndexedSeq<A> seq when seq.length > 0 => _foldr(seq, op),
  _ when knownSize == 0 => throw UnsupportedError('empty.reduceLeft'),
  _ => _reversed().reduceLeft((x, y) => op(y, x)),
};

reduceRightOption() inherited

Option<A> reduceRightOption(A Function(A, A) op)

Returns a summary values of all elements of this collection by applying f to each element, moving right to left.

If this collection is empty, None will be returned.

Inherited from RIterableOnce.

Implementation

dart

Option<A> reduceRightOption(Function2<A, A, A> op) => switch (knownSize) {
  -1 => _reduceOptionIterator(_reversed().iterator, (x, y) => op(y, x)),
  0 => none(),
  _ => Some(reduceRight(op)),
};

remove() override

A remove(int idx)

Removes and returns the element at idx.

Implementation

dart

@override
A remove(int idx) {
  final elem = this[idx];
  removeN(idx, 1);
  return elem;
}

removeAll()

RSeq<A> removeAll(bool Function(A) p)

Removes and returns all elements satisfying p in FIFO order.

Implementation

dart

RSeq<A> removeAll(Function1<A, bool> p) {
  final elems = IVector.builder<A>();

  while (nonEmpty) {
    elems.addOne(_removeHeadAssumingNonEmpty());
  }

  return elems.result();
}

removeAt() override

ArrayDeque<A> removeAt(int idx)

Returns a new collection with the element at idx removed.

Throws RangeError if idx is out of bounds.

Implementation

dart

@override
ArrayDeque<A> removeAt(int idx) => from(super.removeAt(idx));

removeFirst()

Option<A> removeFirst(bool Function(A) p, [int from = 0])

Removes the first element satisfying p at or after from and returns Some(element), or None if no such element exists.

Implementation

dart

Option<A> removeFirst(Function1<A, bool> p, [int from = 0]) => indexWhere(p, from).map(remove);

removeHead()

A removeHead({bool resizeInternalRepr = false})

Removes and returns the first element.

Throws UnsupportedError if this deque is empty.

Implementation

dart

A removeHead({bool resizeInternalRepr = false}) {
  if (isEmpty) {
    throw UnsupportedError('ArrayDeque.removeHead: empty');
  } else {
    return _removeHeadAssumingNonEmpty();
  }
}

removeHeadOption()

Option<A> removeHeadOption({bool resizeInternalRepr = false})

Removes and returns the first element wrapped in Some, or returns None when empty.

Implementation

dart

Option<A> removeHeadOption({bool resizeInternalRepr = false}) {
  if (isEmpty) {
    return const None();
  } else {
    return Some(_removeHeadAssumingNonEmpty());
  }
}

removeHeadWhile()

RSeq<A> removeHeadWhile(bool Function(A) p)

Removes and returns all leading elements satisfying p.

Implementation

dart

RSeq<A> removeHeadWhile(Function1<A, bool> p) {
  final elems = IVector.builder<A>();

  while (headOption.exists(p)) {
    elems.addOne(_removeHeadAssumingNonEmpty());
  }

  return elems.result();
}

removeLast()

A removeLast({bool resizeInternalRepr = false})

Removes and returns the last element.

Throws UnsupportedError if this deque is empty.

Implementation

dart

A removeLast({bool resizeInternalRepr = false}) {
  if (isEmpty) {
    throw UnsupportedError('ArrayDeque.removeLast: empty');
  } else {
    return _removeLastAssumingNonEmpty();
  }
}

removeLastOption()

Option<A> removeLastOption({bool resizeInternalRepr = false})

Removes and returns the last element wrapped in Some, or returns None when empty.

Implementation

dart

Option<A> removeLastOption({bool resizeInternalRepr = false}) {
  if (isEmpty) {
    return const None();
  } else {
    return Some(_removeLastAssumingNonEmpty());
  }
}

removeN() override

void removeN(int idx, int count)

Removes count elements starting at idx.

Implementation

dart

@override
void removeN(int idx, int count) {
  if (count > 0) {
    _requireBounds(idx);

    final n = length;
    final removals = min(n - idx, count);
    final finalLength = n - removals;
    final suffixStart = idx + removals;

    &#47;&#47; If we know we can resize after removing, do it right away using arrayCopy
    &#47;&#47; Else, choose the shorter: either move the prefix (0 until idx) right OR the suffix (idx+removals until n) left
    if (_shouldShrink(finalLength)) {
      final array2 = ArrayDeque.alloc<A>(finalLength);
      _copySliceToArray(0, array2, 0, idx);
      _copySliceToArray(suffixStart, array2, idx, n);
      _reset(array2, 0, finalLength);
    } else if (2 * idx <= finalLength) {
      &#47;&#47; Cheaper to move the prefix right
      var i = suffixStart - 1;

      while (i >= removals) {
        _set(i, _get(i - removals));
        i -= 1;
      }

      while (i >= 0) {
        _set(i, null);
        i -= 1;
      }

      start = _startPlus(removals);
    } else {
      &#47;&#47; Cheaper to move the suffix left
      var i = idx;

      while (i < finalLength) {
        _set(i, _get(i + removals));
        i += 1;
      }

      while (i < n) {
        _set(i, null);
        i += 1;
      }

      end = _endMinus(removals);
    }
  } else if (count < 0) {
    throw ArgumentError("removing negative number of elements: $count");
  }
}

reverse() override

ArrayDeque<A> reverse()

Returns a new collection with the order of the elements reversed.

Implementation

dart

@override
ArrayDeque<A> reverse() {
  final n = length;
  final arr = alloc<A>(n);
  var i = 0;

  while (i < n) {
    arr[i] = this[n - i - 1];
    i += 1;
  }

  return ArrayDeque.internal(arr, 0, n);
}

reverseIterator() inherited

RIterator<A> reverseIterator()

Returns an iterator that will emit all elements in this collection, in reverse order.

Inherited from RSeq.

Implementation

dart

RIterator<A> reverseIterator() => reverse().iterator;

sameElements() inherited

bool sameElements(RIterable<A> that)

Returns true if this collection has the same elements, in the same order, as that.

Inherited from RSeq.

Implementation

dart

bool sameElements(RIterable<A> that) {
  final thisKnownSize = knownSize;
  final thatKnownSize = that.knownSize;
  final knownDifference =
      thisKnownSize != -1 && thatKnownSize != -1 && thisKnownSize != thatKnownSize;

  return !knownDifference && iterator.sameElements(that);
}

scan() override

ArrayDeque<B> scan<B>(B z, B Function(B, A) op)

Alias for scanLeft.

Implementation

dart

@override
ArrayDeque<B> scan<B>(B z, Function2<B, A, B> op) => from(super.scan(z, op));

scanLeft() override

ArrayDeque<B> scanLeft<B>(B z, B Function(B, A) op)

Returns a new collection of running totals starting with z.

The first element of the result is z; each subsequent element is the result of applying op to the previous total and the next element.

Implementation

dart

@override
ArrayDeque<B> scanLeft<B>(B z, Function2<B, A, B> op) => from(super.scanLeft(z, op));

scanRight() override

ArrayDeque<B> scanRight<B>(B z, B Function(A, B) op)

Returns a new collection of running totals starting with z, traversing from right to left.

Implementation

dart

@override
ArrayDeque<B> scanRight<B>(B z, Function2<A, B, B> op) => from(super.scanRight(z, op));

segmentLength() inherited

int segmentLength(bool Function(A) p, [int from = 0])

Returns the length of the longest prefix starting at from where every element satisfies p.

Inherited from RSeq.

Implementation

dart

int segmentLength(Function1<A, bool> p, [int from = 0]) {
  var i = 0;
  final it = iterator.drop(from);

  while (it.hasNext && p(it.next())) {
    i += 1;
  }

  return i;
}

slice() override

ArrayDeque<A> slice(int from, int until)

Returns a new collection containing elements in the range [from, until).

Implementation

dart

@override
ArrayDeque<A> slice(int from, int until) => ArrayDeque.from(super.slice(from, until));

sliceInPlace() override

ArrayDeque<A> sliceInPlace(int start, int end)

Keeps only the elements in [start, end) in place and returns this.

Implementation

dart

@override
ArrayDeque<A> sliceInPlace(int start, int end) => from(super.sliceInPlace(start, end));

sliding() override

RIterator<ArrayDeque<A>> sliding(int size, [int step = 1])

Returns an iterator where elements are fixed size chunks of size n of the original collection. Each chunk is calculated by sliding a 'window' of size n over the original collection, moving the window step elements at a time.

Implementation

dart

@override
RIterator<ArrayDeque<A>> sliding(int size, [int step = 1]) => super.sliding(size, step).map(from);

sortBy() override

ArrayDeque<A> sortBy<B>(Order<B> order, B Function(A) f)

Returns a new collection that is sorted according to order after applying f to each element in this collection.

Implementation

dart

@override
ArrayDeque<A> sortBy<B>(Order<B> order, Function1<A, B> f) => from(super.sortBy(order, f));

sorted() override

ArrayDeque<A> sorted(Order<A> order)

Returns a new collection that is sorted according to order.

Implementation

dart

@override
ArrayDeque<A> sorted(Order<A> order) => from(super.sorted(order));

sortWith() override

ArrayDeque<A> sortWith(bool Function(A, A) lt)

Returns a new collection sorted using the provided function lt which is used to determine if one element is less than the other.

Implementation

dart

@override
ArrayDeque<A> sortWith(Function2<A, A, bool> lt) => from(super.sortWith(lt));

span() override

Record span(bool Function(A) p)

Returns two collections: elements before and starting from the first element that does not satisfy p.

Implementation

dart

@override
(ArrayDeque<A>, ArrayDeque<A>) span(Function1<A, bool> p) {
  final (a, b) = super.span(p);
  return (from(a), from(b));
}

splitAt() inherited

Record splitAt(int n)

Returns two collections: the first n elements and the remainder.

Inherited from RSeq.

Implementation

dart

@override
(RSeq<A>, RSeq<A>) splitAt(int n) => super.splitAt(n)((a, b) => (a.toSeq(), b.toSeq()));

startsWith() inherited

bool startsWith(RIterableOnce<A> that, [int offset = 0])

Returns true if the beginning of this collection corresponds with that.

Inherited from RSeq.

Implementation

dart

bool startsWith(RIterableOnce<A> that, [int offset = 0]) {
  final i = iterator.drop(offset);
  final j = that.iterator;
  while (j.hasNext && i.hasNext) {
    if (i.next() != j.next()) return false;
  }

  return !j.hasNext;
}

subtractOne() override

ArrayDeque<A> subtractOne(A x)

Removes the first occurrence of x and returns this.

Implementation

dart

@override
ArrayDeque<A> subtractOne(A x) => from(super.subtractOne(x));

take() override

ArrayDeque<A> take(int n)

Returns a new collection containing only the first n elements.

Implementation

dart

@override
ArrayDeque<A> take(int n) => from(super.take(n));

takeInPlace() override

ArrayDeque<A> takeInPlace(int n)

Keeps only the first n elements in place and returns this.

Implementation

dart

@override
ArrayDeque<A> takeInPlace(int n) => from(super.takeInPlace(n));

takeRight() override

ArrayDeque<A> takeRight(int n)

Returns a new collection with the last n elements of this collection. If n is greater than the size of this collection, the original collection is returned.

Implementation

dart

@override
ArrayDeque<A> takeRight(int n) => from(super.takeRight(n));

takeRightInPlace() override

ArrayDeque<A> takeRightInPlace(int n)

Keeps only the last n elements in place and returns this.

Implementation

dart

@override
ArrayDeque<A> takeRightInPlace(int n) => from(super.takeRightInPlace(n));

takeWhile() override

ArrayDeque<A> takeWhile(bool Function(A) p)

Returns a new collection of leading elements that satisfy p.

Implementation

dart

@override
ArrayDeque<A> takeWhile(Function1<A, bool> p) => from(super.takeWhile(p));

takeWhileInPlace() override

ArrayDeque<A> takeWhileInPlace(bool Function(A) p)

Keeps only the leading elements satisfying p in place and returns this.

Implementation

dart

@override
ArrayDeque<A> takeWhileInPlace(Function1<A, bool> p) => from(super.takeWhileInPlace(p));

tapEach() override

ArrayDeque<A> tapEach<U>(U Function(A) f)

Applies f to each element in this collection, discarding any results and returns this collection.

Implementation

dart

@override
ArrayDeque<A> tapEach<U>(Function1<A, U> f) => from(super.tapEach(f));

toIList() inherited

IList<A> toIList()

Returns an IList with the same elements as this collection.

Inherited from RIterableOnce.

Implementation

dart

IList<A> toIList() => IList.from(this);

toIndexedSeq() inherited

IndexedSeq<A> toIndexedSeq()

Returns an IndexedSeq with the same elements as this collection.

Inherited from RIterableOnce.

Implementation

dart

IndexedSeq<A> toIndexedSeq() => IndexedSeq.from(this);

toISet() inherited

ISet<A> toISet()

Returns an ISet with the same elements as this collection, duplicates removed.

Inherited from RIterableOnce.

Implementation

dart

ISet<A> toISet() => ISet.from(this);

toIVector() inherited

IVector<A> toIVector()

Returns an IVector with the same elements as this collection.

Inherited from RIterableOnce.

Implementation

dart

IVector<A> toIVector() => IVector.from(this);

toList() inherited

List<A> toList({bool growable = true})

Returns a new List with the same elements as this collection.

Inherited from RIterableOnce.

Implementation

dart

List<A> toList({bool growable = true}) {
  if (growable) {
    final it = iterator;
    final res = List<A>.empty(growable: true);

    while (it.hasNext) {
      res.add(it.next());
    }

    return res;
  } else {
    final it = iterator;
    return List.generate(size, (_) => it.next());
  }
}

toSeq() inherited

RSeq<A> toSeq()

Returns a RSeq with the same elements as this collection.

Inherited from RIterableOnce.

Implementation

dart

RSeq<A> toSeq() => RSeq.from(this);

toString() inherited

String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Inherited from RIterable.

Implementation

dart

@override
String toString() => 'Iterable${mkString(start: '(', sep: ', ', end: ')')}';

traverseEither() override

Either<B, ArrayDeque<C>> traverseEither<B, C>(Either<B, C> Function(A) f)

Applies f to each element of this RSeq and collects the results into a new collection. If Left is encountered for any element, that result is returned and any additional elements will not be evaluated.

Implementation

dart

@override
Either<B, ArrayDeque<C>> traverseEither<B, C>(Function1<A, Either<B, C>> f) =>
    super.traverseEither(f).map(from);

traverseOption() override

Option<ArrayDeque<B>> traverseOption<B>(Option<B> Function(A) f)

Applies f to each element of this RSeq and collects the results into a new collection. If None is encountered for any element, that result is returned and any additional elements will not be evaluated.

Implementation

dart

@override
Option<ArrayDeque<B>> traverseOption<B>(Function1<A, Option<B>> f) =>
    super.traverseOption(f).map(from);

trimToSize()

void trimToSize()

Shrinks the internal array to exactly fit the current number of elements.

Implementation

dart

void trimToSize() => _resize(length);

update()

void update(int idx, A elem)

Replaces the element at idx with elem.

Implementation

dart

void update(int idx, A elem) {
  _requireBounds(idx);
  _set(idx, elem);
}

updated() override

ArrayDeque<A> updated(int index, A elem)

Returns a new collection with the element at index replaced by elem.

Throws RangeError if index is out of bounds.

Implementation

dart

@override
ArrayDeque<A> updated(int index, A elem) => from(super.updated(index, elem));

zip() override

ArrayDeque<Record> zip<B>(RIterableOnce<B> that)

Returns a new collection that combines corresponding elements from this collection and that as a tuple. The length of the returned collection will be the minimum of this collections size and the size of that.

Implementation

dart

@override
ArrayDeque<(A, B)> zip<B>(RIterableOnce<B> that) => from(super.zip(that));

zipAll() override

ArrayDeque<Record> zipAll<B>(RIterableOnce<B> that, A thisElem, B thatElem)

Returns a new collection that combines corresponding elements from this collection and that as a tuple. The length of the returned collection will be the maximum of this collections size and thes size of that. If this collection is shorter than that, thisElem will be used to fill in the resulting collection. If that is shorter, thatElem will be used to will in the resulting collection.

Implementation

dart

@override
ArrayDeque<(A, B)> zipAll<B>(RIterableOnce<B> that, A thisElem, B thatElem) =>
    from(super.zipAll(that, thisElem, thatElem));

zipWithIndex() override

ArrayDeque<Record> zipWithIndex()

Return a new collection with each element of this collection paired with it's respective index.

Implementation

dart

@override
ArrayDeque<(A, int)> zipWithIndex() => from(super.zipWithIndex());

Extension Methods

flatten() extension

RIterable<A> flatten()

Concatenates all inner iterables into a single IList.

Available on RIterable<A>, provided by the RIterableNested2Ops<A> extension

Implementation

dart

RIterable<A> flatten() {
  final it = iterator;
  final b = IList.builder<A>();

  while (it.hasNext) {
    b.addAll(it.next());
  }

  return b.toIList();
}

product() extension

double product()

Returns the product of all elements in this list

Available on RIterableOnce<A>, provided by the RIterableDoubleOps extension

Implementation

dart

double product() {
  var p = 1.0;
  final it = iterator;

  while (it.hasNext) {
    p *= it.next();
  }

  return p;
}

product() extension

int product()

Returns the product of all elements in this list

Available on RIterableOnce<A>, provided by the RIterableIntOps extension

Implementation

dart

int product() {
  var p = 1;
  final it = iterator;

  while (it.hasNext) {
    p *= it.next();
  }

  return p;
}

sum() extension

double sum()

Returns the sum of all elements in this list

Available on RIterableOnce<A>, provided by the RIterableDoubleOps extension

Implementation

dart

double sum() {
  var s = 0.0;
  final it = iterator;

  while (it.hasNext) {
    s += it.next();
  }

  return s;
}

sum() extension

int sum()

Returns the sum of all elements in this list

Available on RIterableOnce<A>, provided by the RIterableIntOps extension

Implementation

dart

int sum() {
  var s = 0;
  final it = iterator;

  while (it.hasNext) {
    s += it.next();
  }

  return s;
}

toIMap() extension

IMap<A, B> toIMap()

Creates a new IMap where element tuple element of this list is used to create a key and value respectively.

Available on RIterable<A>, provided by the RIterableTuple2Ops<A, B> extension

Implementation

dart

IMap<A, B> toIMap() => IMap.from(this);

unzip() extension

Record unzip()

Available on IndexedSeq<A>, provided by the IndexedSeqTuple2Ops<A, B> extension

Implementation

dart

(IndexedSeq<A>, IndexedSeq<B>) unzip() => (
  iseqviews.Map(this, (a) => a.$1),
  iseqviews.Map(this, (a) => a.$2),
);

unzip() extension

Record unzip()

Splits a collection of pairs into two separate collections.

Available on RIterable<A>, provided by the RibsIterableTuple2Ops<A, B> extension

Implementation

dart

(RIterable<A>, RIterable<B>) unzip() => (
  views.Map(this, (a) => a.$1),
  views.Map(this, (a) => a.$2),
);

Operators

operator ==() inherited

bool operator ==(Object other)

The equality operator.

The default behavior for all Objects is to return true if and only if this object and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

Total: It must return a boolean for all arguments. It should never throw.
Reflexive: For all objects o, o == o must be true.
Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.
Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator, it should override the hashCode method as well to maintain consistency.

Inherited from RSeq.

Implementation

dart

@override
bool operator ==(Object other) {
  return identical(this, other) ||
      switch (other) {
        final RSeq<A> that => canEqual(that) && sameElements(that),
        _ => false,
      };
}

operator override

A operator [](int idx)

Returns the element at index idx.

Implementation

dart

@override
A operator [](int idx) {
  _requireBounds(idx);
  return _get(idx);
}

Static Methods

alloc()

Array<T> alloc<T>(int len)

Implementation

dart

@protected
static Array<T> alloc<T>(int len) {
  if (len <= 0) {
    return Array.ofDim(DefaultInitialSize);
  } else {
    &#47;&#47; Use len + 1 to ensure array.length > len (ring buffer needs one spare slot)
    final nextPowerOf2 = pow(2, (log(len + 1) &#47; ln2).ceil()).toInt();

    return Array.ofDim(max(nextPowerOf2, DefaultInitialSize));
  }
}

from() override

ArrayDeque<A> from<A>(RIterableOnce<A> elems)

Creates an ArrayDeque from a RIterableOnce.

Returns elems directly when it is already an ArrayDeque; otherwise copies elements into a new deque, pre-sizing the backing array when the element count is known.

Implementation

dart

static ArrayDeque<A> from<A>(RIterableOnce<A> elems) {
  if (elems is ArrayDeque<A>) {
    return elems;
  } else {
    final s = elems.knownSize;

    if (s >= 0) {
      final array = alloc<A>(s);
      final actual = elems.iterator.copyToArray(array);

      if (actual != s) throw StateError('ArrayDeque: copied $actual of $s');

      return ArrayDeque.internal(array, 0, s);
    } else {
      return ArrayDeque<A>().addAll(elems);
    }
  }
}

fromDart() override

ArrayDeque<A> fromDart<A>(Iterable<A> elems)

Creates an ArrayDeque from a Dart Iterable.

Implementation

dart

static ArrayDeque<A> fromDart<A>(Iterable<A> elems) => from(RIterator.fromDart(elems.iterator));

Constants

DefaultInitialSize

const int DefaultInitialSize

Implementation

dart

static const DefaultInitialSize = 16;

ArrayDeque<A> ​

Constructors ​

ArrayDeque() ​

ArrayDeque.internal() ​

Properties ​

array read / write ​

end read / write ​

hashCode no setter inherited ​

head no setter inherited ​

headOption no setter inherited ​

init no setter override ​

inits no setter override ​

isEmpty no setter override ​

isNotEmpty no setter inherited ​

isTraversableAgain no setter inherited ​

iterator no setter override ​

knownSize no setter override ​

last no setter inherited ​

lastOption no setter inherited ​

length no setter override ​

nonEmpty no setter inherited ​

runtimeType no setter inherited ​

size no setter inherited ​

start read / write ​

tail no setter override ​

tails no setter override ​

Methods ​

addAll() override ​

addOne() override ​

append() override ​

appendAll() override ​

appended() override ​

appendedAll() override ​

canEqual() inherited ​

clear() override ​

collect() override ​

collectFirst() inherited ​

combinations() override ​

concat() override ​

contains() inherited ​

containsSlice() inherited ​

copyToArray() inherited ​

corresponds() inherited ​

count() inherited ​

diff() override ​

distinct() override ​

distinctBy() override ​

drop() override ​

dropInPlace() override ​

dropRight() override ​

dropRightInPlace() override ​

dropWhile() override ​

dropWhileInPlace() override ​

endsWith() inherited ​

exists() inherited ​

filter() override ​

filterNot() override ​

find() inherited ​

findLast() inherited ​

flatMap() override ​

fold() inherited ​

foldLeft() inherited ​

foldRight() inherited ​

forall() inherited ​

foreach() inherited ​

groupBy() override ​

grouped() override ​

groupMap() override ​

groupMapReduce() inherited ​

indexOf() inherited ​

indexOfSlice() inherited ​

indexWhere() inherited ​

indices() inherited ​

insert() override ​

insertAll() override ​

intersect() override ​

intersperse() override ​

isDefinedAt() inherited ​

lastIndexOf() inherited ​

lastIndexOfSlice() inherited ​

ArrayDeque<A>

Constructors

ArrayDeque()

ArrayDeque.internal()

Properties

array read / write

end read / write

hashCode no setter inherited

head no setter inherited

headOption no setter inherited

init no setter override

inits no setter override

isEmpty no setter override

isNotEmpty no setter inherited

isTraversableAgain no setter inherited

iterator no setter override

knownSize no setter override

last no setter inherited

lastOption no setter inherited

length no setter override

nonEmpty no setter inherited

runtimeType no setter inherited

size no setter inherited

start read / write

tail no setter override

tails no setter override

Methods

addAll() override

addOne() override

append() override

appendAll() override

appended() override

appendedAll() override

canEqual() inherited

clear() override

collect() override

collectFirst() inherited

combinations() override

concat() override

contains() inherited

containsSlice() inherited

copyToArray() inherited

corresponds() inherited

count() inherited

diff() override

distinct() override

distinctBy() override

drop() override

dropInPlace() override

dropRight() override

dropRightInPlace() override

dropWhile() override

dropWhileInPlace() override

endsWith() inherited

exists() inherited

filter() override

filterNot() override

find() inherited

findLast() inherited

flatMap() override

fold() inherited

foldLeft() inherited

foldRight() inherited

forall() inherited

foreach() inherited

groupBy() override

grouped() override

groupMap() override

groupMapReduce() inherited

indexOf() inherited

indexOfSlice() inherited

indexWhere() inherited

indices() inherited

insert() override

insertAll() override

intersect() override

intersperse() override

isDefinedAt() inherited

lastIndexOf() inherited

lastIndexOfSlice() inherited