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