22 lines
599 B
JavaScript
22 lines
599 B
JavaScript
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var _getLength = require('./_getLength.js');
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var contains = require('./contains.js');
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// Produce an array that contains every item shared between all the
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// passed-in arrays.
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function intersection(array) {
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var result = [];
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var argsLength = arguments.length;
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for (var i = 0, length = _getLength(array); i < length; i++) {
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var item = array[i];
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if (contains(result, item)) continue;
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var j;
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for (j = 1; j < argsLength; j++) {
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if (!contains(arguments[j], item)) break;
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}
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if (j === argsLength) result.push(item);
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}
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return result;
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}
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module.exports = intersection;
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