21 lines
517 B
JavaScript
21 lines
517 B
JavaScript
/*!
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* array-initial <https://github.com/jonschlinkert/array-initial>
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*
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* Copyright (c) 2014 Jon Schlinkert, contributors.
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* Licensed under the MIT license.
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*/
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var isNumber = require('is-number');
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var slice = require('array-slice');
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module.exports = function arrayInitial(arr, num) {
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if (!Array.isArray(arr)) {
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throw new Error('array-initial expects an array as the first argument.');
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}
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if (arr.length === 0) {
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return null;
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}
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return slice(arr, 0, arr.length - (isNumber(num) ? num : 1));
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};
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