js---数组习题---

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

   <html xmlns="http://www.w3.org/1999/xhtml"><head>

   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  <title>数组练习：各种数组方法的使用</title>

   <style>

   div{color:green;padding:10px 15px;margin:12px 0;background:#f0f0f0;border:1px dotted #333;font:12px/1.5 Courier New;word-wrap:break-word;}

   </style>

   <script type="text/javascript">

   window.onload = function ()

  {

      var aDiv = document.getElementsByTagName("div");

      var aInput = document.getElementsByTagName("input");

      var i = 0;

      var bS1 = bS2 = true;

      var aTmp = [];

      //删除/添加第一项

      aInput[0].onclick = function ()

      {

          aTmp = getArray(aDiv[0].innerHTML);

          bS1 ?

          //删除第一项， shift()方法

         (aTmp.shift(), this.value = this.value.replace("删除","添加"), bS1 = false) :

        //添加第一项, unshift()方法

          (aTmp.unshift("January(1)"), this.value = this.value.replace("添加","删除"), bS1 = true);

          //输出

          aDiv[0].innerHTML = aTmp.join()

      };

     //删除/添加最后一项

      aInput[1].onclick = function ()

      {

          aTmp = getArray(aDiv[0].innerHTML);

          bS2 ?

          //删除最后一项, pop()方法

          (aTmp.pop(), this.value = this.value.replace("删除","添加"), bS2 = false) :

         //添加最后一项, push()方法

          (aTmp.push("December(12)"), this.value = this.value.replace("添加","删除"), bS2 = true);

          //输出

          aDiv[0].innerHTML = aTmp.join()

      };

     //复制, concat()方法

      aInput[2].onclick = function ()

    {

         aTmp = getArray(aDiv[1].innerHTML);

         //输出

         aDiv[1].innerHTML = aTmp.concat(aTmp).toString().replace(/\s/g,"")

      };

      //还原, 利用数组的 length 特点

      aInput[3].onclick = function ()

      {

          aTmp = getArray(aDiv[1].innerHTML);

          //设置数组长度

          aTmp.length = 10;

         //输出

          aDiv[1].innerHTML = aTmp.join()

      };

      //第三组数据还原

      aInput[4].onclick = function ()

      {

          aTmp = ["red","green","blue","white","yellow","black","brown"];

          //输出

         aDiv[2].innerHTML = aTmp.join()

      };

      //删除前三项

      aInput[5].onclick = function ()

      {

          aTmp = getArray(aDiv[2].innerHTML);

          //删除, 0开始, 删除3个

          aTmp.splice(0, 3);

        //输出

          aDiv[2].innerHTML = aTmp.join()

      };

      //删除第二至三项

      aInput[6].onclick = function ()

      {

         aTmp = getArray(aDiv[2].innerHTML);

         //删除, 2开始, 删除2个

          aTmp.splice(1, 2);

          //输出

          aDiv[2].innerHTML = aTmp.join()

     };

      //在第二顶后插入"orange", "purple"

     aInput[7].onclick = function ()

     {

        aTmp = getArray(aDiv[2].innerHTML);

        //插入, 2开始, 插入"orange", "purple"

         aTmp.splice(1, 0, "orange", "purple");

        //输出

         aDiv[2].innerHTML = aTmp.join()

     };

     //替换第二项和第三项

    aInput[8].onclick = function ()

     {

        aTmp = getArray(aDiv[2].innerHTML);

         //插入, 2开始替换

         aTmp.splice(1, 2, "#009900", "#0000ff");

         //输出

        aDiv[2].innerHTML = aTmp.join()

    };

    //将div中的内容转为数组

     //str    div对象

     function getArray(str)

    {

         aTmp.length = 0;

        str = str.split(",");

         for (var i in str)aTmp.push(str[i]);

         return aTmp

     }

 }

</script>

 </head>

 <body>

 <div>January(1),February(2),March(3),April(4),May(5),June(6),July(7),Aguest(8),September(9),October(10),November(11),December(12)</div>

 <input value="删除January(1)" type="button">

 <input value="删除December(12)" type="button">

<div>0,1,2,3,4,5,6,7,8,9</div>

 <input value="复制" type="button">

<input value="还原" type="button">

 <div>red,green,blue,white,yellow,black,brown</div>

 <input value="还原" type="button">

 <input value="删除前三项" type="button">

 <input value="删除第二至三项" type="button">

 <input value="在第二项后插入(orange, purple)" type="button">

 <input value="替换第二项和第三项" type="button">

</body></html>
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js---数组习题---

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