Quantity class

A unit of measurement representing a dimensionless quantity (a.k.a. "bare", "pure", or "scalar" quantity). This means it is a quantity that has no corresponding physical dimension associated with it.

Inheritance
Available Extensions

Constructors

Quantity.fromBillions(Rational billions)
Creates a Quantity representing the specified number of billions.
factory
Quantity.fromMillions(Rational millions)
Creates a Quantity representing the specified number of millions.
factory
Quantity.fromOnes(Rational ones)
Creates a Quantity representing the specified number of ones.
factory
Quantity.fromThousands(Rational thousands)
Creates a Quantity representing the specified number of thousands.
factory
Quantity.fromTrillions(Rational trillions)
Creates a Quantity representing the specified number of trillions.
factory
Quantity.fromUnits(QuantityUnit unit, Rational value)
Creates a Quantity given a unit and rational value for that unit.

Properties

baseValue ↔ Rational
The underlying base value of the unit of measurement.
latefinalinherited
billions → Rational
Gets the number of billions in this Quantity, including any fractional portion.
no setter
hashCode → int
The hash code for this object.
no setterinherited
millions → Rational
Gets the number of millions in this Quantity, including any fractional portion.
no setter
ones → Rational
Gets the number of ones in this Quantity, including any fractional portion.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
thousands → Rational
Gets the number of thousands in this Quantity, including any fractional portion.
no setter
trillions → Rational
Gets the number of trillions in this Quantity, including any fractional portion.
no setter

Methods

abs() → Quantity
Gets the absolute value.
inherited
compareTo(Quantity other) → int
Compares this object to another object.
inherited
createValue(Rational baseValue) → Quantity
Creates a unit of measurement value with the specified baseValue.
override
getBaseValue(QuantityUnit unit, Rational value) → Rational
Gets the base value for a unit of measurement of unit and value.
override
getLargestUnit({required Set<QuantityUnit> permissibleUnits}) → QuantityUnit
Determines the largest unit that has a value of at least 1.
inherited
getUnits(QuantityUnit unit) → Rational
Gets the number of unit units in this unit of measurement.
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
per(Duration period) → QuantityRate
Creates a QuantityRate with the specified period from this value.
round(QuantityUnit roundTo) → Quantity
Rounds this unit of measurement such that the roundTo unit will be rounded towards the nearest integer.
inherited
toString() → String
A string representation of this object.
override

Operators

operator *(Rational factor) → Quantity
Multiplies this value by factor.
inherited
operator +(Quantity other) → Quantity
Adds other onto this value.
inherited
operator -(Quantity other) → Quantity
Subtracts other from this value.
inherited
operator /(Rational divisor) → Quantity
Divides this value by divisor.
inherited
operator <(Quantity other) → bool
Determines whether this value is less than other.
inherited
operator <=(Quantity other) → bool
Determines whether this value is less than or equal to other.
inherited
operator ==(Object other) → bool
Determines whether this unit of measurement value is equal to other.
inherited
operator >(Quantity other) → bool
Determines whether this value is greater than other.
inherited
operator >=(Quantity other) → bool
Determines whether this value is greater than or equal to other.
inherited
operator unary-() → Quantity
Negates this value.
inherited

Static Properties

zero → Quantity
A Quantity of zero.
final