文件操作 - define-built-in.js
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文件: /usr/share/nodejs/core-js/internals/define-built-in.js
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var isCallable = require('../internals/is-callable'); var definePropertyModule = require('../internals/object-define-property'); var makeBuiltIn = require('../internals/make-built-in'); var defineGlobalProperty = require('../internals/define-global-property'); module.exports = function (O, key, value, options) { if (!options) options = {}; var simple = options.enumerable; var name = options.name !== undefined ? options.name : key; if (isCallable(value)) makeBuiltIn(value, name, options); if (options.global) { if (simple) O[key] = value; else defineGlobalProperty(key, value); } else { try { if (!options.unsafe) delete O[key]; else if (O[key]) simple = true; } catch (error) { /* empty */ } if (simple) O[key] = value; else definePropertyModule.f(O, key, { value: value, enumerable: false, configurable: !options.nonConfigurable, writable: !options.nonWritable }); } return O; };
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