@filter

Keep elements of an array for which a helper returns truthy.

Returns: array

Syntax

@filter(arr fn)

Arguments

Name	Type	Description
arr	array	Source array
fn	helper	Predicate helper returning bool

Examples

# Filter positive numbers
def @isPositive "$n: number -> bool" @bool($n > 0)
set $nums [-1 2 -3 4]
set $pos @filter($nums @isPositive)

See Also

• @find — return the first match
• @all — check if all elements match
• @any — check if any element matches
• @map — transform each element