javascript相当于php $$美元 [英] javascript equivalent of php $$ dollar dollar

问题描述

1. 我在名为validate的函数中声明了一个名为cont的局部变量。


2. 我从内部验证函数进程。


3. 我发送字符串'cont'作为验证函数的参数。


4. 在使用字符串'cont'的进程函数中我想访问javascript局部变量的值喜欢window ['cont']。但我得到了未定义。


5. 我想要做的是尝试访问php或$$中的$ GLOBALS等变量。

1. I have declared a local variable named cont in a function named validate.
2. I am calling a function process from inside validate.
3. I am sending the string 'cont' as argument to validate function.
4. In the process function using the string 'cont' i want to access the javascript local variable's value like window['cont']. But i get undefined.
5. What i am trying to do is trying to access variables like $GLOBALS in php or $$.

这是我做的一个例子。

<script>

function process(str)
{
   alert(window[str]);
}

function validate()
{
   var cont='once there lived a king named midas';
   process('cont')
}

validate();

</script>

原因是我将大部分表格作为ajax。我不想这样做一个请求字符串。

The reason is i do most of the forms as ajax. i dont want to make a request string like this.

var param = "command=insert&content=" + encodeURIComponent(cont);

我想这样做。

var param = makeParam('command,[insert],content,(cont)');

我在makeparam中所做的是使用正则表达式来提取键值对。
所以我从（cont）获得字符串cont并将其替换为窗口变量，如window [cont]。 cont将有字符串'cont'。

what i do in makeparam is i use regular expression to extract key value pairs. so i get the string cont from (cont) and i substitute it into window variable like window[cont]. cont will have the string 'cont'.

那么我们如何通过将变量的名称用作字符串来获取变量的内容？

so how do we get the content of a variable by using the name of the variable as string?

所以我正在寻找javascript相当于php的$$

so i am looking for javascript equivalent of php's $$

已编辑

代码的一部分，我提取内部的cont（续），这意味着我希望字符串的内容在（）之间。

a part of the code where i extract cont which is inside (cont) which means i want the content of the string between ().

nxt = str[i+1].match(/\((.*)\)$/)

if(nxt)param += '=' + encodeURIComponent(window[nxt[1]]);

param的内容将是

the content of param would be

"command=insert&content=once there lived a king"
// assume that once there lived a king is encoded

---

编辑。注2。

经过几次回复，我正在编辑代码以添加此内容。

After few more responses i am editing the code to add this.

I我试图像在PHP中的$ GLOBALS一样。

I am trying to do like $GLOBALS in php.

我还没有尝试过$ GLOBALS是否也会支持局部变量。

I haven't tried whether $GLOBALS would cantain local variables too.

并了解到本地范围不会进入$ GLOBALS。

and learned that local scope will not come into $GLOBALS.

阅读Felix King后更新更新。

我想使用一个函数来构建一个尽可能简单的查询字符串。如下所示。

I want to use a function which will construct a query string as simpler as possible. like the following.

var param = makeParam('command,insert,/title/,/keywords/,/description/,mode,[1],fckcontent,(cont)');

// if it is a text without // or () then the it is a straight key value pair. so i will do comment=insert.

//if it is /title/ then the key is title and its value is an input elements value with id as title so title=getElementById('title')

//if it is mode,[1] then mode is the key and 1 is its direct value//

//if it is fckcontent,(cont) then fckcontent is the key and cont is a javascript local variable which will contain html content from a WYSIWYG editor.

// a sample result will be

 var param = "command=insert&keywords=somekeywords&description=somedescription&mode=1&fckcontent=<p>once there lived a king<p>

然后卡萨布兰卡表示$ GlOBALS不会包含本地范围变量和这在javascript中是一样的。那是对的。

and then casablanca stated that $GlOBALS will not contain local scope variables and that is the same way in javascript. that's right.

推荐答案

function validate()
{
   var cont='once there lived a king named midas';
   process('cont')
}

cont 在函数的本地范围中定义，而不是在全局范围内定义要么只是

cont is defined in the local scope of the function, not in global scope. Either do just

cont='once there lived a king named midas';

（不含 var ）或

window.cont='once there lived a king named midas';

更新：

但是你为什么要在解析字符串时经历这么多麻烦呢？你为什么不这样做：

But why do you want to go through so much trouble with parsing strings? Why don't you do:

var param = makeParam({command: 'insert', content: encodeURIComponent(cont)});

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