aaac7fed
 liuqimichale
add
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'use strict';
var isExtendable = require('is-extendable');
var assignSymbols = require('assign-symbols');
module.exports = Object.assign || function(obj/*, objects*/) {
if (obj === null || typeof obj === 'undefined') {
throw new TypeError('Cannot convert undefined or null to object');
}
if (!isObject(obj)) {
obj = {};
}
for (var i = 1; i < arguments.length; i++) {
var val = arguments[i];
if (isString(val)) {
val = toObject(val);
}
if (isObject(val)) {
assign(obj, val);
assignSymbols(obj, val);
}
}
return obj;
};
function assign(a, b) {
for (var key in b) {
if (hasOwn(b, key)) {
a[key] = b[key];
}
}
}
function isString(val) {
return (val && typeof val === 'string');
}
function toObject(str) {
var obj = {};
for (var i in str) {
obj[i] = str[i];
}
return obj;
}
function isObject(val) {
return (val && typeof val === 'object') || isExtendable(val);
}
/**
* Returns true if the given `key` is an own property of `obj`.
*/
function hasOwn(obj, key) {
return Object.prototype.hasOwnProperty.call(obj, key);
}
function isEnum(obj, key) {
return Object.prototype.propertyIsEnumerable.call(obj, key);
}
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