JavaScript數(shù)組各種常見用法實(shí)例分析

更新時(shí)間：2015年08月04日 12:59:15 作者：皮蛋

這篇文章主要介紹了JavaScript數(shù)組各種常見用法實(shí)例分析,包括數(shù)組的添加、刪除、替換、還原等常見技巧,非常具有實(shí)用價(jià)值,需要的朋友可以參考下

本文實(shí)例講述了JavaScript數(shù)組各種常見用法。分享給大家供大家參考。具體如下：

運(yùn)行效果如下圖所示：

具體代碼如下：

<!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>javascript各種數(shù)組方法的使用</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 = [];
  //刪除/添加第一項(xiàng)
  aInput[0].onclick = function ()
  {
    aTmp = getArray(aDiv[0].innerHTML);
    bS1 ?
    //刪除第一項(xiàng)， shift()方法
    (aTmp.shift(), this.value = this.value.replace("刪除","添加"), bS1 = false) :
    //添加第一項(xiàng), unshift()方法
    (aTmp.unshift("January(1)"), this.value = this.value.replace("添加","刪除"), bS1 = true);
    //輸出
    aDiv[0].innerHTML = aTmp.join()
  };
  //刪除/添加最后一項(xiàng)
  aInput[1].onclick = function ()
  {
    aTmp = getArray(aDiv[0].innerHTML);
    bS2 ?
    //刪除最后一項(xiàng), pop()方法
    (aTmp.pop(), this.value = this.value.replace("刪除","添加"), bS2 = false) :
    //添加最后一項(xiàng), push()方法
    (aTmp.push("December(12)"), this.value = this.value.replace("添加","刪除"), bS2 = true);
    //輸出
    aDiv[0].innerHTML = aTmp.join()
  };
  //復(fù)制, concat()方法
  aInput[2].onclick = function ()
  {
    aTmp = getArray(aDiv[1].innerHTML);
    //輸出
    aDiv[1].innerHTML = aTmp.concat(aTmp).toString().replace(/\s/g,"")
  };
  //還原, 利用數(shù)組的 length 特點(diǎn)
  aInput[3].onclick = function ()
  {
    aTmp = getArray(aDiv[1].innerHTML);
    //設(shè)置數(shù)組長度
    aTmp.length = 10;
    //輸出
    aDiv[1].innerHTML = aTmp.join()
  };
  //第三組數(shù)據(jù)還原
  aInput[4].onclick = function ()
  {
    aTmp = ["red","green","blue","white","yellow","black","brown"];
    //輸出
    aDiv[2].innerHTML = aTmp.join()
  };
  //刪除前三項(xiàng)
  aInput[5].onclick = function ()
  {
    aTmp = getArray(aDiv[2].innerHTML);
    //刪除, 0開始, 刪除3個(gè)
    aTmp.splice(0, 3);  
    //輸出
    aDiv[2].innerHTML = aTmp.join()
  };
  //刪除第二至三項(xiàng)
  aInput[6].onclick = function ()
  {
    aTmp = getArray(aDiv[2].innerHTML);
    //刪除, 2開始, 刪除2個(gè)
    aTmp.splice(1, 2);  
    //輸出
    aDiv[2].innerHTML = aTmp.join()
  };
  //在第二頂后插入"orange", "purple"
  aInput[7].onclick = function ()
  {
    aTmp = getArray(aDiv[2].innerHTML);
    //插入, 2開始, 插入"orange", "purple"
    aTmp.splice(1, 0, "orange", "purple");  
    //輸出
    aDiv[2].innerHTML = aTmp.join()
  };
  //替換第二項(xiàng)和第三項(xiàng)
  aInput[8].onclick = function ()
  {
    aTmp = getArray(aDiv[2].innerHTML);
    //插入, 2開始替換
    aTmp.splice(1, 2, "#009900", "#0000ff");  
    //輸出
    aDiv[2].innerHTML = aTmp.join()
  };
  //將div中的內(nèi)容轉(zhuǎn)為數(shù)組
  //str  div對(duì)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 type="button" value="刪除January(1)" />
<input type="button" value="刪除December(12)" />
<div>0,1,2,3,4,5,6,7,8,9</div>
<input type="button" value="復(fù)制" />
<input type="button" value="還原" />
<div>red,green,blue,white,yellow,black,brown</div>
<input type="button" value="還原" />
<input type="button" value="刪除前三項(xiàng)" />
<input type="button" value="刪除第二至三項(xiàng)" />
<input type="button" value="在第二項(xiàng)后插入(orange, purple)" />
<input type="button" value="替換第二項(xiàng)和第三項(xiàng)" />
</body>
</html>

希望本文所述對(duì)大家的javascript程序設(shè)計(jì)有所幫助。

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