filter

Keeps the values which pass a test. [:running:] [:vhs:] [:package:] [:moon:]

iterable.filter(x, fn, [ths]);
// x:   an iterable
// fn:  test function (v, i, x)
// ths: this argument

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

var x = [1, 2, 3, 4, 5];
[...iterable.filter(x, v => v % 2 === 0)];
// [2, 4]

references

• Array.prototype.filter(): MDN web docs
• iterable_filter: PHP
• Data.List.filter(): Haskell [:running:]: https://npm.runkit.com/@extra-iterable/filter [:vhs:]: https://asciinema.org/a/xhdLLhqcfQQAg35XR8pNcurNY [:package:]: https://www.npmjs.com/package/@extra-iterable/filter [:moon:]: https://www.npmjs.com/package/@extra-iterable/filter.min