17 lines
341 B
JavaScript
17 lines
341 B
JavaScript
'use strict';
|
|
|
|
module.exports = function map(fn) {
|
|
var _this = this;
|
|
|
|
if (Array.isArray(this.items)) {
|
|
return new this.constructor(this.items.map(fn));
|
|
}
|
|
|
|
var collection = {};
|
|
|
|
Object.keys(this.items).forEach(function (key) {
|
|
collection[key] = fn(_this.items[key], key);
|
|
});
|
|
|
|
return new this.constructor(collection);
|
|
}; |