1 |
3a515b92
|
cagy
|
'use strict';
|
2 |
|
|
|
3 |
|
|
var isObject = require('is-extendable');
|
4 |
|
|
|
5 |
|
|
module.exports = function extend(o/*, objects*/) {
|
6 |
|
|
if (!isObject(o)) { o = {}; }
|
7 |
|
|
|
8 |
|
|
var len = arguments.length;
|
9 |
|
|
for (var i = 1; i < len; i++) {
|
10 |
|
|
var obj = arguments[i];
|
11 |
|
|
|
12 |
|
|
if (isObject(obj)) {
|
13 |
|
|
assign(o, obj);
|
14 |
|
|
}
|
15 |
|
|
}
|
16 |
|
|
return o;
|
17 |
|
|
};
|
18 |
|
|
|
19 |
|
|
function assign(a, b) {
|
20 |
|
|
for (var key in b) {
|
21 |
|
|
if (hasOwn(b, key)) {
|
22 |
|
|
a[key] = b[key];
|
23 |
|
|
}
|
24 |
|
|
}
|
25 |
|
|
}
|
26 |
|
|
|
27 |
|
|
/**
|
28 |
|
|
* Returns true if the given `key` is an own property of `obj`.
|
29 |
|
|
*/
|
30 |
|
|
|
31 |
|
|
function hasOwn(obj, key) {
|
32 |
|
|
return Object.prototype.hasOwnProperty.call(obj, key);
|
33 |
|
|
}
|