takeWhile

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