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61 lines
1.2 KiB
61 lines
1.2 KiB
4 years ago
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'use strict';
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var isExtendable = require('is-extendable');
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var assignSymbols = require('assign-symbols');
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module.exports = Object.assign || function(obj/*, objects*/) {
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if (obj === null || typeof obj === 'undefined') {
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throw new TypeError('Cannot convert undefined or null to object');
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}
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if (!isObject(obj)) {
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obj = {};
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}
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for (var i = 1; i < arguments.length; i++) {
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var val = arguments[i];
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if (isString(val)) {
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val = toObject(val);
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}
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if (isObject(val)) {
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assign(obj, val);
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assignSymbols(obj, val);
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}
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}
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return obj;
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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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function isString(val) {
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return (val && typeof val === 'string');
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}
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function toObject(str) {
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var obj = {};
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for (var i in str) {
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obj[i] = str[i];
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}
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return obj;
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}
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function isObject(val) {
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return (val && typeof val === 'object') || isExtendable(val);
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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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function isEnum(obj, key) {
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return Object.prototype.propertyIsEnumerable.call(obj, key);
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}
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