Fraction class

Dart representation of a fraction having both the numerator and the denominator as integers.

Fraction(-2, 5);
Fraction.fromDouble(1.5);
Fraction.fromString("4/5");

There also are extension methods to quickly build Fraction objects from primitive types:

1.5.toFraction();
"4/5".toFraction();

If the string doesn't represent a valid fraction, a FractionException object is thrown.

Inheritance

Constructors

Fraction(int numerator, [int denominator = 1]): Creates a new representation of a fraction. If the denominator is negative, the fraction is 'normalized' so that the minus sign only appears in front of the denominator.
factory
Fraction.fromDouble(double value, {double precision = 1.0e-12}): Tries to give a fractional representation of a double according with the given precision. This implementation takes inspiration from the continued fraction algorithm.
factory
Fraction.fromGlyph(String value): Returns an instance of Fraction if the source string is a glyph representing a fraction.
factory
Fraction.fromMixedFraction(MixedFraction mixed): Converts a MixedFraction into a Fraction.
factory
Fraction.fromString(String value): Returns an instance of Fraction if the source string is a valid representation of a fraction. Some valid examples are:
factory

denominator → int: The divisor b of the a/b division, which also is the denominator of the associated fraction.
no setteroverride
hashCode → int: The hash code for this object.
no setteroverride
isFractionGlyph → bool: Returns true if this Fraction object has an associated unicode glyph. For example:
no setter
isImproper → bool: Returns true if the numerator is equal or greater than the denominator.
no setter
isNegative → bool: True or false whether this rational number is positive or negative.
no setteroverride
isProper → bool: Returns true if the numerator is smaller than the denominator.
no setter
isWhole → bool: True or false whether this rational number is whole or not.
no setteroverride
numerator → int: The dividend a of the a/b division, which also is the numerator of the associated fraction.
no setteroverride
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

compareTo(Rational other) → int: Compares this object to another object.
inherited
copyWith({int? numerator, int? denominator}) → Fraction: Creates a deep copy of this object with the given fields replaced with the new values.
inverse() → Fraction: The numerator and the denominator of this object are swapped and returned in a new Fraction object.
negate() → Fraction: The sign is changed and the result is returned in new instance.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
reduce() → Fraction: Reduces this rational number to the lowest terms and returns the result in a new instance.
override
toDouble() → double: A floating point representation of this rational number.
override
toEgyptianFraction() → List<Fraction>: Represents this rational number as an egyptian fraction.
override
toMixedFraction() → MixedFraction: Converts this object into a MixedFraction.
toString() → String: A string representation of this object.
override
toStringAsGlyph() → String: If possible, this method converts this Fraction instance into an unicode glyph string.

operator *(Fraction other) → Fraction: The product of two fractions.
operator +(Fraction other) → Fraction: The sum between two fractions.
operator -(Fraction other) → Fraction: The difference between two fractions.
operator /(Fraction other) → Fraction: The division of two fractions.
operator <(Rational other) → bool: Checks whether this rational number is smaller than the other.
inherited
operator <=(Rational other) → bool: Checks whether this rational number is smaller or equal than the other.
inherited
operator ==(Object other) → bool: The equality operator.
override
operator >(Rational other) → bool: Checks whether this rational number is greater than the other.
inherited
operator >=(Rational other) → bool: Checks whether this rational number is greater or equal than the other.
inherited
operator [](int index) → int: Allows retrieving numerator or denominator by index. In particular, ´0´ refers to the numerator and ´1´ to the denominator.