css3 - 我是做PHP的，为什么我现在看<java从入门到精通>这本书暂时毫无压力，为什么看《javascript》权威指南感觉很吃力呢？-PHP Tutorial-php.cn

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css3 - 我是做PHP的，为什么我现在看<java从入门到精通>这本书暂时毫无压力，为什么看《javascript》权威指南感觉很吃力呢？

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Jun 06, 2016 pm 08:46 PM

css3javajavascriptphpprogrammer

我是做PHP的，为什么我现在看这本书暂时毫无压力，为什么看《javascript》权威指南感觉很吃力呢？个人感觉基于对象的javascript 比纯面对对象的java难度要大得多啊

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JS与前两者差别较大的估计是： 面向对象、模块化、作用域，特别是面向对象，用了特别奇特的构造函数模式来模拟类定义、封装和继承，而php中则与Java相差无几。由于javascript不是特别强调面向对象(虽然它本身就是面向对象)，所以那些习惯了面向对象思维的code们在理解JS代码的逻辑组织方式时，是比较相对"混乱"些的。而JS在在模块化方面写法也是多样化，没有统一性，最后就是作用域， JS 的变量作用域与php和java相比，是属于比较宽松的,就像它的变量定义一样....

因为你看的Java是入门,Javascript是权威...

马云和马伊琍有关系吗。。。

javascript是基于原型继承的面向对象实现，跟java和php的面向对象有很大不同。

你暂时先把以前php和java里面学到的那些面向对象忘记，忘记class，别想着用extend class来做继承啊什么的，完全以javascript的方式来学一段时间再说。

翻译的用词比较难以理解，如果你看一些翻译比较通俗易懂的就很容易领悟了。其实javascript不是很难。

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