如何在Javascript中使用goto？ [英] How can I use goto in Javascript?

问题描述

我有一些代码，我绝对必须使用 goto 来实现。例如，我想写一个这样的程序：

I have some code that I absolutely must implement using goto. For example, I want to write a program like this:

start:
alert("RINSE");
alert("LATHER");
repeat: goto start

有没有办法在Javascript中执行此操作？

Is there a way to do that in Javascript?

推荐答案

绝对！有一个名为 Summer of Goto 的项目允许您使用JavaScript它的最大潜力将彻底改变您编写代码的方式。

Absolutely! There is a project called Summer of Goto that allows you use JavaScript at its fullest potential and will revolutionize the way you can write your code.

这个JavaScript预处理工具允许您创建标签，然后使用以下语法转到它：

This JavaScript preprocessing tool allows you to create a label and then goto it using this syntax:

[lbl] <label-name>
goto <label-name>

例如，问题中的示例可以写成如下：

For example, the example in the question can be written as follows:

[lbl] start:
alert("LATHER");
alert("RINSE");
[lbl] repeat: goto start;

请注意，您不仅限于简单的琐碎程序，如无尽的 LATHER RINSE 重复循环 - goto 提供的可能性是无穷无尽的，你甚至可以制作一个 Hello，world！向JavaScript控制台发送538次消息，如下所示：

Note that you are not just limited to simple trivial programs like an endless LATHER RINSE repeat cycle—the possibilities afforded by goto are endless and you can even make a Hello, world! message to the JavaScript console 538 times, like this:

var i = 0;
[lbl] start:
console.log("Hello, world!");
i++;
if(i < 538) goto start;

你可以阅读更多关于如何实现goto的信息，但基本上，它会进行一些JavaScript预处理，利用你可以用标记为，而循环。所以，当你写下Hello，world！上面的程序，它被翻译成这样的东西：

You can read more about how goto is implemented, but basically, it does some JavaScript preprocessing that takes advantage of the fact that you can simulate a goto with a labelled while loop. So, when you write the "Hello, world!" program above, it gets translated to something like this:

var i = 0;
start: while(true) {
  console.log("Hello, world!");
  i++;
  if(i < 538) continue start;
  break;
}

此预处理过程存在一些限制，因为while循环无法跨越多个功能或块。但这并不是什么大不了的事 - 我确信在JavaScript中利用 goto 的好处绝对会让你无所适从。

There are some limitations to this preprocessing process, because while loops cannot stretch across multiple functions or blocks. That's not a big deal, though—I'm sure the benefits of being able to take advantage of goto in JavaScript will absolutely overwhelm you.

以上所有导致goto.js库的链接都是DEAD，这里是需要的链接：

All above link that lead to goto.js library is ALL DEAD, here is links needed:

goto.js（未压缩） --- parseScripts.js（未压缩）

来自 Goto.js ：

PS对于任何想知道的人（到目前为止总共为零人），Goto的夏天是一个由Paul Irish推广的术语，同时讨论这个脚本和PHP决定将goto添加到他们的语言中。

P.S. For anyone who is wondering (so far a total of zero people), Summer of Goto is a term that was popularized by Paul Irish, while discussing this script and PHP’s decision to add goto into their language.

对于那些没有立即认识到这一切都是个笑话的人，请原谅我。 < ;-(保险）。

And for those who do not immediately recognize that this entire thing is a joke, please forgive me. <—(insurance).

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