filter (original) (raw)

Keep values which pass a test.

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

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

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

xarray.filter(x, v => v % 2 === 0); // → [ 2, 4 ]