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堆:内存分配,js引用类型的值是分配在堆内存中的
栈:当函数运行的时候将会把函数推进push到调用栈中去,结束的时候就会把栈顶元素移除。浏览器存在最大调用栈,当超过的时候将会报错。
那么左边的head存在什么用处,平常我们听到的就是基本类型存放在栈中,引用类型存放在堆中,但是这些到底和head是不是有一定的联系呐?调用栈和内存堆栈的区别?
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好像不建議用 try catch 做設計,好像是因為 memory會lock住,所以catch 還要在補清除catch的寫法。
大概是這樣的解釋吧。 https://docs.microsoft.com/zh-tw/cpp/mfc/exceptions-freeing-objects-in-exceptions?view=vs-2019
當初我也會用 try catch 取代 promise 因為結構比較簡潔但後來就沒做這樣的堅持了。
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调用堆栈定义
堆:内存分配,js引用类型的值是分配在堆内存中的
栈:当函数运行的时候将会把函数推进push到调用栈中去,结束的时候就会把栈顶元素移除。浏览器存在最大调用栈,当超过的时候将会报错。
调用栈和内存堆栈的区别
那么左边的head存在什么用处,平常我们听到的就是基本类型存放在栈中,引用类型存放在堆中,但是这些到底和head是不是有一定的联系呐?调用栈和内存堆栈的区别?
问题:
里面存放的是上下文,分为两种上下文,一种是全局上下文,另一种是函数上下文
The text was updated successfully, but these errors were encountered: