takeWhile

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Subhajit Sahu edited this page May 3, 2023 · 15 revisions

Keep values from left, while a test passes.

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

function takeWhile(x, ft)
// x:  an array
// ft: test function (v, i, x)

const xarray = require('extra-array');

var x = [1, 2, 3, 4, 5];
xarray.takeWhile(x, v => v < 3);
// → [ 1, 2 ]

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

References