Question

我希望能够取出定时事件的结果，但我不知道如何找到它的索引。问题是我按时间从数组中选择一个项目，但是按索引号选择，所以我需要能够在计时器运行后得到结果。

这将是

mixedgroup1.splice(i, 1);

其中i是最终结果的索引号，但我不知道如何得到它。

有什么想法吗？

这是JS代码：

var basket = ['apple', 'banana', 'cherry', 'durian', 'eggplant', 'fig', 'grapes', 'huckleberry', 'kiwi', 'lemon', 'mango'];

 function randOrd(){
return (Math.round(Math.random())-0.5); } 

 mixedBasket = basket.sort( randOrd ); //randomize the array

 var i = 0;  // the index of the current item to show


 function showBasket(){
 fruitDisplay = setInterval(function() {            
    document
        .getElementById('fruit')
        .innerHTML = mixedBasket[i++];    // get the item and increment
    if (i == mixedBasket.length) i = 0;   // reset to first element if you've reached the end
 }, 70);  //speed to display items

 var endFruitDisplay = setTimeout(function( ) { clearInterval(fruitDisplay); }, 3600); 
 //stop display after x milliseconds
}

这是HTML：

<html>

<head></head>
<body>


<center>
   <h1> <span id="fruit"></span><p></h1>
 <script> var fruitSound = new Audio(); 
        fruitSound.src = "boardfill.mp3"; 

    function showFruitwithSound()
    { 
    fruitSound.play(); // Play button sound now 
    showBasket()
    } 

 </script>

<button onclick="showFruitwithSound()">Choose Fruit</button>

</center> 

<script type="text/javascript" src="Fruitpicker3.js"></script>
</body>
</html>

Answer 1

以下是如何获得最终结果的索引：

mixedBasket.indexOf(document.getElementById('fruit').innerHTML);

在此处添加：

var endFruitDisplay = setTimeout(function( ) { 
        clearInterval(fruitDisplay); 
        var index = mixedBasket.indexOf(document.getElementById('fruit').innerHTML); 

        //do splice and stuff

        document.getElementById("indexnum").innerHTML = index;    
    }, 3600);

Answer 2

很抱歉这么密集，但我对js相当新。我根本无法获得任何输出。这是重写：

 <center>
 <h1> <span id="fruit"></span><p></h1> 

   <script> var fruitSound = new Audio(); 
    fruitSound.src = "boardfill.mp3"; 

    function showFruitwithSound()
    { 
    fruitSound.play(); // Play button sound now 
    showBasket()
    } 

 </script>

 <p id = "indexnum">
 <button onclick="showFruitwithSound()">Choose Fruit</button>

   </center> 
 <script>  
 var indexf = mixedBasket.indexOf(document.getElementById('fruit').innerHTML);
 document.getElementById("indexnum").innerHTML = indexf + " this is the index number."; 
 </script>

  <script type="text/javascript" src="Fruitpicker3.js"></script>
 </body>

如果定时事件，拼接结果

2 个答案: