filter

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Subhajit Sahu edited this page Feb 4, 2021 · 17 revisions

Keeps entries which pass a test. 🏃 📼 📦 🌔 📒

Similar: map, reduce, filter, filterAt, reject, rejectAt.

entries.filter(x, ft);
// x:  entries
// ft: test function (v, k, x)

const entries = require("extra-entries");

var x = [["a", 1], ["b", 2], ["c", 3], ["d", 4], ["e", 5]];
[...entries.filter(x, v => v % 2 === 1)];
// [ [ "a", 1 ], [ "c", 3 ], [ "e", 5 ] ]

[...entries.filter(x, v => v % 2 === 0)];
// [ [ "b", 2 ], [ "d", 4 ] ]

References