ImmutableSet

struct

@DebugElements Public Struct ImmutableSet<T> Implements Iterable<T>, Defaultable, Sendable, Hashable

Local a = ImmutableSet<Int>().AddAll([1, 2])
Local b = a.Add(3)
Expect(a.Count == 2 && b.Count == 3)
Expect(b.Contains(3) && !a.Contains(3))

std/collections/immutable.fb, line 750

• Public New() constructor #

  An empty one.

• Public Static Method From(values: Iterable<T>): ImmutableSet<T> static method #

  One with the values, all read first.

• Public Property Count: Int property #

  How many values it holds.

• Public Method Contains(value: T): Bool method #

  Whether it holds value.

• Public Method Add(value: T): ImmutableSet<T> method #

  A copy with the value, or the same one when it has it.

• Public Method AddAll(values: Iterable<T>): ImmutableSet<T> method #

  A copy with each of the values added, all read first.

• Public Method Remove(value: T): ImmutableSet<T> method #

  A copy without the value, or the same one when it hasn't got it.

• Public Method ToArray(): T[] method #

  The values, in a new array, in the order they go in.

• Public Static Method DefaultValue(): ImmutableSet<T> static method #

  An empty one.

• Operator ==(a: ImmutableSet<T>, b: ImmutableSet<T>): Bool operator #

  Two ImmutableSets are equal when they have the same values.

• Public Method Hash(): UInt64 method #

  Equal ImmutableSets have equal hashes, whatever order their values go in.

• Public Method Iterate(): ImmutableSetIterator<T> method #

  The values, by their hashes, and values of one hash in the order they were added.