unshift

Adds values to the start.

Alternatives: default, update.
Similar: push, pop, shift, unshift.

iterable.unshift(x, ...vs);
// x:  an iterable
// vs: values to add
// --> iterable

const iterable = require('extra-iterable');

var x = [3, 4];
iterable.unshift(x, 2);
// [ 2, 3, 4 ]

iterable.unshift(x, 1, 2);
// [ 1, 2, 3, 4 ]

references

• iterable.prototype.unshift(): MDN web docs
• immutable-iterable-prototype: @azu