takeWhile

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Subhajit Sahu edited this page May 17, 2020 · 15 revisions

Extracts values till a test passes. 🏃 [:vhs:] 📦 🌔 📒

Alternatives: take, takeWhile.
Similar: take, drop.

iterable.takeWhile(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.takeWhile(x, v => v < 3)];
// [ 1, 2 ]

[...iterable.takeWhile(x, v => v < 4)];
// [ 1, 2, 3 ]

references