Semigroup<T> mixin

A semigroup is any set A with an associative operation (combine).

(xy)z = x(yz) = xyz for all x, y, z in A

Properties

hashCode → int

The hash code for this object.

read-only, inherited

runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Methods

combine(T x, T y) → T

Associative operation which combines two values.

combineN(T a, int n) → T

Return a combined with itself n times.

intercalate(T middle) → Semigroup<T>

Return a Semigroup which inserts middle between each pair of elements.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reverse() → Semigroup<T>

Return a Semigroup that reverses the order.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

first<A>() → Semigroup<A>

Create a Semigroup instance that always returns the lefthand side.

instance<A>(A f(A a1, A a2)) → Semigroup<A>

Create a Semigroup instance from the given function.

last<A>() → Semigroup<A>

Create a Semigroup instance that always returns the righthand side.