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這個練習是相當學術的,但它對理解JavaScript的行爲很有用。Node.js/JavaScript內置類型的存根?
爲什麼這項工作:
var fs = require('fs');
console.log(fs.readdirSync('/').length); //approximately '28' on my Macbook
fs['readdirSync'] = function(){ return ['/tmp', '/bin']; };
console.log(fs.readdirSync('/').length); //'2' as expected
,這並不:
var a = "hello world";
console.log(a.length); //'11'
a['length'] = 1000;
console.log(a.length); //still '11'... why??
我知道這是可能的猴補丁內置類型如String的JavaScript,但有可能存根他們?
在此先感謝。