JavaScript: 如何计算关联数组中随机抛硬币的正面和反面的总数？

Question

我有一个数组，其中包含另外两个关联数组：

 var coinToss = [];

 coinToss["FlipNumber"]; coinToss["Result"];

我已经让随机发生器功能正常工作了。我只需要帮助计算所有 'heads' 和 'tails'.

的总和

我试过：

 for (var i = 0; i < coinToss.length; i++)
 {
      var headCount = 0, tailCount = 0;

      if (coinToss["Result"] === 'heads')
            headCount++;
      else
            tailCount++;
 }
 document.getElementByID.innerHTML += "Heads: " + headCount + " " + "Tails: " + tailCount + "<br>";

但它只打印出每个单独的结果，例如，抛 5 次硬币：

 //*Heads: 1   Tails: 0 *
 //*Heads: 1   Tails: 0 *
 //*Heads: 0   Tails: 1 *
 //*Heads: 1   Tails: 0 *
 //*Heads: 0   Tails: 0 *

我想要的是把所有的'heads'加起来，把所有的'tails'分开加起来。为什么每次循环重复时它都会重置为 0？

按要求编辑：

 function coinFlip() {
        return (Math.floor(Math.random() * 2) === 0) ? 'heads' : 'tails';
 }

 for (var x = 0; x < 6 (/*i.e. number of coin toss*/); x++)
 {
     var coinToss = [];
     coinToss["flipNumber"] = /*varies by user input*/;
     coinToss["Result"] = (coinFlip());

     /*a print code that prints Flip Number: () and Result: ()*/
 }

Answer 1

这应该让你开始：

// Make sure you're declaring your variables outside of the for loop:

// I'm not sure what your actual array looks like, but let's say it looks something like this:
var arr = [0, 0, 1, 1, 1, 0, 1, 0, 1];
arr["Result"] = "heads";
var headCount = 0, tailCount = 0;

for (var i = 0; i < arr.length; i++) {
    if (arr["Result"] === "heads")
        headCount += arr[i];
    else
        tailCount += arr[i];
}
console.log("Heads: " + headCount + " " + "Tails: " + tailCount);

Answer 2

//* these variables should be initialised outside the loop
//* otherwise they'll get initialised with zero each time the loop runs

var headCount = 0, tailCount = 0;

for (var i = 0; i < coinToss.length; i++) {

  if (coinToss["Result"] === 'heads')
        headCount++;
  else
        tailCount++;
 }

document.getElementByID.innerHTML += "Heads: " + headCount + " " +     "Tails: " + tailCount + "<br>";

JavaScript: 如何计算关联数组中随机抛硬币的正面和反面的总数？

JavaScript: How To Count Total Number Of Heads and Tails In Random Coin Flip Within Associative Array?

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