takeWhile (original) (raw)

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

• Data.List.takeWhile() : Haskell
• Array.slice() : MDN Web Docs
• _.takeWhile() : Lodash