Javascript“变量变量”：如何根据另一个变量分配变量？ [英] Javascript "Variable Variables": how to assign variable based on another variable?

问题描述

我在Javascript中有一组全局计数器变量：

I have a set of global counter variables in Javascript:

var counter_0 = 0;
var counter_1 = 0;
var counter_2 = 0;

等

然后我有一个Javascript接受映射到那些全局计数器的'索引'号的函数。在这个函数中，我需要使用传递给函数的'index'值来读取和写入那些全局计数器。

I then have a Javascript function that accepts an 'index' number that maps to those global counters. Inside this function, I need to read and write to those global counters using the 'index' value passed to the function.

我希望它如何工作的示例，但当然根本不起作用：

Example of how I'd like it to work, but of course doesn't work at all:

function process(index) {
    // do some processing

    // if 'index' == 0, then this would be incrementing the counter_0 global variable
    ++counter_+index; 

    if (counter_+index == 13)
    {
        // do other stuff
    }
}

我希望我想要完成的事情是清楚的。如果不是，我会尽力澄清。谢谢。

I hope what I'm trying to accomplish is clear. If not I'll try to clarify. Thanks.

编辑澄清：

我不是想增加柜台的名称，而是计数器包含的值。

I'm not trying to increment the name of the counter, but rather the value the counter contains.

推荐答案

对我来说看起来像一个数组，或者我错过了什么？

Looks like an array to me, or am I missing something?

var counters = [0,0,0];

function process(index) {
   ++counters[index]; 
      /* or ++counters[index]+index, not sure what you want to do */
   if (counters[index] === 13) { 
      /* do stuff */ 
   }
}

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