34 lines
838 B
JavaScript
34 lines
838 B
JavaScript
'use strict';
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module.exports = function crossJoin() {
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function join(collection, constructor, args) {
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var current = args[0];
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if (current instanceof constructor) {
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current = current.all();
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}
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var rest = args.slice(1);
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var last = !rest.length;
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var result = [];
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for (var i = 0; i < current.length; i += 1) {
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var collectionCopy = collection.slice();
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collectionCopy.push(current[i]);
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if (last) {
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result.push(collectionCopy);
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} else {
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result = result.concat(join(collectionCopy, constructor, rest));
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}
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}
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return result;
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}
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for (var _len = arguments.length, values = Array(_len), _key = 0; _key < _len; _key++) {
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values[_key] = arguments[_key];
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}
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return new this.constructor(join([], this.constructor, [].concat([this.items], values)));
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}; |