59 lines
967 B
JavaScript
59 lines
967 B
JavaScript
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/*!
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* arr-diff <https://github.com/jonschlinkert/arr-diff>
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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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'use strict';
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var flatten = require('arr-flatten');
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var slice = require('array-slice');
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/**
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* Return the difference between the first array and
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* additional arrays.
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*
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* ```js
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* var diff = require('{%= name %}');
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*
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* var a = ['a', 'b', 'c', 'd'];
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* var b = ['b', 'c'];
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*
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* console.log(diff(a, b))
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* //=> ['a', 'd']
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* ```
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*
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* @param {Array} `a`
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* @param {Array} `b`
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* @return {Array}
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* @api public
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*/
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function diff(arr, arrays) {
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var argsLen = arguments.length;
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var len = arr.length, i = -1;
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var res = [], arrays;
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if (argsLen === 1) {
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return arr;
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}
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if (argsLen > 2) {
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arrays = flatten(slice(arguments, 1));
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}
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while (++i < len) {
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if (!~arrays.indexOf(arr[i])) {
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res.push(arr[i]);
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}
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}
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return res;
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}
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/**
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* Expose `diff`
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*/
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module.exports = diff;
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