Array Destructuring
Taking elements out of arrays by position.
The Basics
(bind items #a(1 2 3 4 5))
(bind (array first second) items)
(console:log first second)
const items = [1, 2, 3, 4, 5];
const [first, second] = items;
console.log(first, second); // 1 2
Skipping Elements with _
_ skips a position without binding:
(bind (array _ _ third) items)
const [, , third] = items; // third = 3
Note: _ as a skip marker only works in array patterns. In object patterns, _ is a regular binding name.
Collecting Remaining Elements
(bind (array head (rest tail)) items)
const [head, ...tail] = items; // head = 1, tail = [2, 3, 4, 5]
rest collects all remaining elements into an array. It must be the last element in the pattern.
Swapping Variables
A classic destructuring trick — no temporary variable needed:
(bind (array b a) (array a b))
[b, a] = [a, b];