prefixes - nodef/extra-array GitHub Wiki

Obtain all possible prefixes.

Alternatives: iprefixes, prefixes. Similar: randomPrefix, prefixes, hasPrefix.

function prefixes(x, n)
// x: an array
// n: number of values [-1 ⇒ any]

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

xarray.prefixes([1, 2]);
// → [ [], [ 1 ], [ 1, 2 ] ]

xarray.prefixes([1, 2, 3]);
// → [ [], [ 1 ], [ 1, 2 ], [ 1, 2, 3 ] ]

References