filter - nodef/extra-object GitHub Wiki

Keep entries which pass a test.

Alternatives: filter, filter$. Similar: filter, filterAt. Similar: map, reduce, filter, reject.

function filter(x, ft)
// x:  an object
// ft: test function (v, k, x)

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

var x = {a: 1, b: 2, c: 3, d: 4, e: 5};
object.filter(x, v => v % 2 === 1);
// → { a: 1, c: 3, e: 5 }

object.filter(x, v => v % 2 === 0);
// → { b: 2, d: 4 }

References

• Data.List.filter: Haskell
• Array.prototype.filter: MDN web docs
• array_filter: PHP
• _.remove: lodash
• _.without: lodash
• _.compact: lodash
• _.pull: lodash
• _.pullAll: lodash
• _.pullAllBy: lodash
• _.pullAllWith: lodash
• Array.filter: sugarjs
• Array.exclude: sugarjs
• Array.compact: sugarjs
• array-tools.where: @75lb