Velocity final

finalclassVelocityextendsQuantity<Velocity>

A quantity representing linear velocity (speed in a given direction).

Inheritance

Object → Quantity<A extends Quantity<A>> → Velocity

Constructors

Velocity()

Velocity(doublevalue,UnitOfMeasure<Velocity>unit)

Implementation

Velocity(super.value, super.unit);

Properties

hashCode no setter inherited

intgethashCode

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 Quantity.

Implementation

@override
int get hashCode => Object.hash(value, unit);

runtimeType no setter inherited

TypegetruntimeType

A representation of the runtime type of the object.

Inherited from Object.

Implementation

external Type get runtimeType;

toFeetPerSecond no setter

VelocitygettoFeetPerSecond

Converts this to feet per second (ft/s).

Implementation

Velocity get toFeetPerSecond => to(feetPerSecond).feetPerSecond;

toKilometersPerHour no setter

VelocitygettoKilometersPerHour

Converts this to kilometers per hour (km/h).

Implementation

Velocity get toKilometersPerHour => to(kilometersPerHour).kilometersPerHour;

toKilometersPerSecond no setter

VelocitygettoKilometersPerSecond

Converts this to kilometers per second (km/s).

Implementation

Velocity get toKilometersPerSecond => to(kilometersPerSecond).kilometersPerSecond;

toKnots no setter

VelocitygettoKnots

Converts this to knots (kn).

Implementation

Velocity get toKnots => to(knots).knots;

toMetersPerSecond no setter

VelocitygettoMetersPerSecond

Converts this to meters per second (m/s).

Implementation

Velocity get toMetersPerSecond => to(metersPerSecond).metersPerSecond;

toMillimetersPerSecond no setter

VelocitygettoMillimetersPerSecond

Converts this to millimeters per second (mm/s).

Implementation

Velocity get toMillimetersPerSecond => to(millimetersPerSecond).millimetersPerSecond;

toUsMilesPerHour no setter

VelocitygettoUsMilesPerHour

Converts this to US miles per hour (mph).

Implementation

Velocity get toUsMilesPerHour => to(usMilesPerHour).usMilesPerHour;

unit final inherited

finalUnitOfMeasure<Velocity>unit

The unit of measure that value is expressed in.

Inherited from Quantity.

Implementation

final UnitOfMeasure<A> unit;

value final inherited

finaldoublevalue

The raw numeric value of this quantity expressed in unit.

Inherited from Quantity.

Implementation

final double value;

Methods

equivalentTo() inherited

boolequivalentTo(Quantity<Velocity>other)

Returns true if this quantity represents the same physical magnitude as other, regardless of which unit each is expressed in.

Inherited from Quantity.

Implementation

bool equivalentTo(Quantity<A> other) => other.to(unit) == value;

noSuchMethod() inherited

dynamicnoSuchMethod(Invocationinvocation)

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:

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:

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

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

to() inherited

doubleto(UnitOfMeasure<Velocity>uom)

Converts this quantity to uom and returns the raw double value.

If uom equals unit, the current value is returned unchanged.

Inherited from Quantity.

Implementation

double to(UnitOfMeasure<A> uom) => uom == unit ? value : uom.convertTo(unit.convertFrom(value));

toString() inherited

StringtoString()

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 Quantity.

Implementation

@override
String toString() => '$value ${unit.symbol}';

Operators

operator +() inherited

Velocityoperator +(Velocitythat)

Returns the sum of this quantity and that, expressed in unit.

that is converted to unit before adding, so mixed-unit addition is safe.

Inherited from Quantity.

Implementation

A operator +(A that) => unit.call(value + that.to(unit));

operator -() inherited

Velocityoperator -(Velocitythat)

Returns the difference of this quantity and that, expressed in unit.

that is converted to unit before subtracting, so mixed-unit subtraction is safe.

Inherited from Quantity.

Implementation

A operator -(A that) => unit.call(value - that.to(unit));

operator /()

Accelerationoperator /(Timethat)

Divides this velocity by that time to produce an Acceleration in m/s².

Implementation

Acceleration operator /(Time that) =>
    Acceleration.metersPerSecondSquared(toMetersPerSecond.value / that.toSeconds.value);

operator <() inherited

booloperator <(Velocitythat)

Returns true if this quantity is less than that.

that is converted to unit before comparing.

Inherited from Quantity.

Implementation

bool operator <(A that) => value < that.to(unit);

operator <=() inherited

booloperator <=(Velocitythat)

Returns true if this quantity is less than or equal to that.

that is converted to unit before comparing.

Inherited from Quantity.

Implementation

bool operator <=(A that) => value <= that.to(unit);

operator ==() inherited

booloperator ==(Objectother)

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 Quantity.

Implementation

@override
bool operator ==(Object other) =>
    identical(this, other) ||
    (other is Quantity<A> && other.value == value && other.unit == unit);

operator >() inherited

booloperator >(Velocitythat)

Returns true if this quantity is greater than that.

that is converted to unit before comparing.

Inherited from Quantity.

Implementation

bool operator >(A that) => value > that.to(unit);

operator >=() inherited

booloperator >=(Velocitythat)

Returns true if this quantity is greater than or equal to that.

that is converted to unit before comparing.

Inherited from Quantity.

Implementation

bool operator >=(A that) => value >= that.to(unit);

Static Properties

feetPerSecond final

finalVelocityUnitfeetPerSecond

Unit for feet per second (ft/s).

Implementation

static final VelocityUnit feetPerSecond = FeetPerSecond._();

kilometersPerHour final

finalVelocityUnitkilometersPerHour

Unit for kilometers per hour (km/h).

Implementation

static final VelocityUnit kilometersPerHour = KilometersPerHour._();

kilometersPerSecond final

finalVelocityUnitkilometersPerSecond

Unit for kilometers per second (km/s).

Implementation

static final VelocityUnit kilometersPerSecond = KilometersPerSecond._();

knots final

finalVelocityUnitknots

Unit for knots (kn) — nautical miles per hour.

Implementation

static final VelocityUnit knots = Knots._();

metersPerSecond final

finalVelocityUnitmetersPerSecond

Unit for meters per second (m/s) — the SI unit of velocity.

Implementation

static final VelocityUnit metersPerSecond = MetersPerSecond._();

millimetersPerSecond final

finalVelocityUnitmillimetersPerSecond

Unit for millimeters per second (mm/s).

Implementation

static final VelocityUnit millimetersPerSecond = MillimetersPerSecond._();

units final

finalSet<VelocityUnit>units

All supported Velocity units.

Implementation

static final units = {
  feetPerSecond,
  millimetersPerSecond,
  metersPerSecond,
  kilometersPerSecond,
  kilometersPerHour,
  usMilesPerHour,
  knots,
};

usMilesPerHour final

finalVelocityUnitusMilesPerHour

Unit for US miles per hour (mph).

Implementation

static final VelocityUnit usMilesPerHour = UsMilesPerHour._();

Static Methods

parse() override

Option<Velocity>parse(Strings)

Parses s into a Velocity, returning None if parsing fails.

Implementation

static Option<Velocity> parse(String s) => Quantity.parse(s, units);