crow/col/set.crow (source)

new[t] t set(...a t array) t key

Set containing the given elements (with duplicates removed).

to[t] t set(a t array) t key

Set containing the given elements (with duplicates removed).

to[t] t array(a t set) t key

Copies set elements to a list.

is-empty[t] bool(a t set) t key

true iff a.size == 0.

size[t] nat64(a t set) t key

Number of elements in the set.

in[t] bool(value t, a t set) t key

true iff value is an element of a.

subscript[t] bool(a t set, value t) t key

Alternative way of writing 'value in a'

~[t] t set(a t set, value t) t key

Adds an element to the set.

If value is alerady in the set, returns a unmodified.

~~[t] t set(a t set, b t set) t key

Same as a | b.

|[t] t set(a t set, b t set) t key

Union of two sets.

This is a set containing all elements in either a or b.

&[t] t set(a t set, b t set) t key

Intersection of two sets.

This is a set containing all elements in both a and b.

-[t] t set(a t set, b t set) t key

Set difference.

This is a set containing all elements in a but not in b.

try-add[t] t set?(a t set, value t) t key

If value is already in the set, returns an empty option.
Else, adds it and returns the new set.

iterate[t] bool(a t set, f mut bool(t)) t key

build[t] t set(a build-options, f mut void(t set-builder)) t key

~=[t] void(a t set-builder, value t) t key

~~=[t, col] void(a t set-builder, values col) t key, (col, t) iterate