33 lines
576 B
JavaScript
33 lines
576 B
JavaScript
'use strict';
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var isObject = require('is-extendable');
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module.exports = function extend(o/*, objects*/) {
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if (!isObject(o)) { o = {}; }
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var len = arguments.length;
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for (var i = 1; i < len; i++) {
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var obj = arguments[i];
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if (isObject(obj)) {
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assign(o, obj);
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}
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}
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return o;
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};
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function assign(a, b) {
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for (var key in b) {
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if (hasOwn(b, key)) {
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a[key] = b[key];
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}
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}
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}
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/**
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* Returns true if the given `key` is an own property of `obj`.
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*/
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function hasOwn(obj, key) {
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return Object.prototype.hasOwnProperty.call(obj, key);
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}
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