文件操作 - copy-constructor-properties.js
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文件: /usr/share/nodejs/core-js/internals/copy-constructor-properties.js
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var hasOwn = require('../internals/has-own-property'); var ownKeys = require('../internals/own-keys'); var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor'); var definePropertyModule = require('../internals/object-define-property'); module.exports = function (target, source, exceptions) { var keys = ownKeys(source); var defineProperty = definePropertyModule.f; var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f; for (var i = 0; i < keys.length; i++) { var key = keys[i]; if (!hasOwn(target, key) && !(exceptions && hasOwn(exceptions, key))) { defineProperty(target, key, getOwnPropertyDescriptor(source, key)); } } };
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