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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/object.assign/implementation.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/object.assign/implementation.js')
-rw-r--r--node_modules/object.assign/implementation.js41
1 files changed, 41 insertions, 0 deletions
diff --git a/node_modules/object.assign/implementation.js b/node_modules/object.assign/implementation.js
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+'use strict';
+
+// modified from https://github.com/es-shims/es6-shim
+var keys = require('object-keys');
+var bind = require('function-bind');
+var canBeObject = function (obj) {
+ return typeof obj !== 'undefined' && obj !== null;
+};
+var hasSymbols = require('has-symbols/shams')();
+var toObject = Object;
+var push = bind.call(Function.call, Array.prototype.push);
+var propIsEnumerable = bind.call(Function.call, Object.prototype.propertyIsEnumerable);
+var originalGetSymbols = hasSymbols ? Object.getOwnPropertySymbols : null;
+
+module.exports = function assign(target, source1) {
+ if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
+ var objTarget = toObject(target);
+ var s, source, i, props, syms, value, key;
+ for (s = 1; s < arguments.length; ++s) {
+ source = toObject(arguments[s]);
+ props = keys(source);
+ var getSymbols = hasSymbols && (Object.getOwnPropertySymbols || originalGetSymbols);
+ if (getSymbols) {
+ syms = getSymbols(source);
+ for (i = 0; i < syms.length; ++i) {
+ key = syms[i];
+ if (propIsEnumerable(source, key)) {
+ push(props, key);
+ }
+ }
+ }
+ for (i = 0; i < props.length; ++i) {
+ key = props[i];
+ value = source[key];
+ if (propIsEnumerable(source, key)) {
+ objTarget[key] = value;
+ }
+ }
+ }
+ return objTarget;
+};