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 函数，它接受映射到这些全局计数器的索引"编号.在此函数中，我需要使用传递给函数的索引"值来读取和写入这些全局计数器.

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很清楚.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.

编辑说明:

我不是要增加计数器的名称，而是要增加计数器包含的值.

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，还是我遗漏了什么?

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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