15 lines
326 B
JavaScript
Vendored
15 lines
326 B
JavaScript
Vendored
'use strict';
|
|
|
|
module.exports = function union(object) {
|
|
var _this = this;
|
|
|
|
var collection = JSON.parse(JSON.stringify(this.items));
|
|
|
|
Object.keys(object).forEach(function (prop) {
|
|
if (_this.items[prop] === undefined) {
|
|
collection[prop] = object[prop];
|
|
}
|
|
});
|
|
|
|
return new this.constructor(collection);
|
|
}; |