1module.exports = extend
 2
 3var hasOwnProperty = Object.prototype.hasOwnProperty;
 4
 5function extend() {
 6    var target = {}
 7
 8    for (var i = 0; i < arguments.length; i++) {
 9        var source = arguments[i]
10
11        for (var key in source) {
12            if (hasOwnProperty.call(source, key)) {
13                target[key] = source[key]
14            }
15        }
16    }
17
18    return target
19}