Fraction class

A rational number.

Implemented types
Mixed-in types
Annotations
  • @immutable

Constructors

Fraction(int numerator, [int denominator = 1])
Creates a fraction from a numerator and an optional denominator.
factory
Fraction.fromDouble(num value, {int maxDenominator = 1000000000, double absoluteError = 0.0})
Creates an approximate fraction from a floating point value.
factory

Properties

a int
Returns the numerator of the fraction.
final
b int
Returns the denominator of the fraction.
final
denominator int
Alternative way to access the denominator of the fraction.
no setter
hashCode int
The hash code for this object.
no setteroverride
isFinite bool
Tests if this fraction is finite.
no setter
isInfinite bool
Tests if this fraction is infinite.
no setter
isNaN bool
Tests if this fraction is not defined.
no setter
isNegative bool
Tests if this fraction is negative.
no setter
numerator int
Alternative way to access the numerator of the fraction.
no setter
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
sign int
Returns the sign of this fraction.
no setter

Methods

abs() Fraction
Returns the absolute value of this fraction.
ceil() int
Ceils this fraction to an integer.
closeTo(Fraction other, num epsilon) bool
Tests if this object is close to another object.
compareTo(Fraction other) int
Compares this object to another object.
override
floor() int
Floors this fraction to an integer.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
pow(int n) Fraction
Returns the power of this fraction.
reciprocal() Fraction
Returns the multiplicative inverse of this fraction.
round() int
Rounds this fraction to an integer.
toDouble() double
Converts this fraction to a double.
toInt() int
Converts this fraction to an integer.
toString() String
A string representation of this object.
override
truncate() int
Truncates this fraction to an integer.

Operators

operator *(Object other) Fraction
Returns the multiplication of this fraction and other.
operator +(Object other) Fraction
Returns the sum of this fraction and other.
operator -(Object other) Fraction
Returns the difference of this fraction and other.
operator /(Object other) Fraction
Returns the division of this fraction and other.
operator <(Fraction other) bool
inherited
operator <=(Fraction other) bool
inherited
operator ==(Object other) bool
The equality operator.
override
operator >(Fraction other) bool
inherited
operator >=(Fraction other) bool
inherited
operator unary-() Fraction
Returns the negation of this fraction.

Static Properties

positive Iterable<Fraction>
Infinite iterable over all positive fractions.
no setter

Static Methods

farey(int n, {bool ascending = true}) Iterable<Fraction>
Iterable over the Farey sequence of order n.
tryParse(String source) Fraction?
Parses source as a Fraction. Returns null in case of a problem.

Constants

infinity → const Fraction
The infinite fraction.
nan → const Fraction
The fraction that is not a number.
negativeInfinity → const Fraction
The negative infinite fraction.
one → const Fraction
The neutral multiplicative element, that is 1.
zero → const Fraction
The neutral additive element, that is 0.