| /*! |
| * array-slice <https://github.com/jonschlinkert/array-slice> |
| * |
| * Copyright (c) 2014-2017, Jon Schlinkert. |
| * Released under the MIT License. |
| */ |
| |
| 'use strict'; |
| |
| module.exports = function slice(arr, start, end) { |
| var len = arr.length; |
| var range = []; |
| |
| start = idx(len, start); |
| end = idx(len, end, len); |
| |
| while (start < end) { |
| range.push(arr[start++]); |
| } |
| return range; |
| }; |
| |
| function idx(len, pos, end) { |
| if (pos == null) { |
| pos = end || 0; |
| } else if (pos < 0) { |
| pos = Math.max(len + pos, 0); |
| } else { |
| pos = Math.min(pos, len); |
| } |
| |
| return pos; |
| } |