JavaScript數組各種常見用法實例分析
編輯：關於JavaScript
本文實例講述了JavaScript數組各種常見用法。分享給大家供大家參考。具體如下：
運行效果如下圖所示：
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
aInput[0].onclick = function ()
{
aTmp = getArray(aDiv[0].innerHTML);
bS1 ?
//刪除第一項， shift()方法
(aTmp.shift(), this.value = this.value.replace("刪除","添加"), bS1 = false) :
//添加第一項, 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/添加最後一項
aInput[1].onclick = function ()
{
aTmp = getArray(aDiv[0].innerHTML);
bS2 ?
//刪除最後一項, pop()方法
(aTmp.pop(), this.value = this.value.replace("刪除","添加"), bS2 = false) :
//添加最後一項, 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, 利用數組的 length 特點
aInput[3].onclick = function ()
{
aTmp = getArray(aDiv[1].innerHTML);
//設置數組長度
aTmp.length = 10;
//輸出
aDiv[1].innerHTML = aTmp.join()
};
//第三組數據還原
aInput[4].onclick = function ()
{
aTmp = ["red","green","blue","white","yellow","black","brown"];
//輸出
aDiv[2].innerHTML = aTmp.join()
};
//刪除前三項
aInput[5].onclick = function ()
{
aTmp = getArray(aDiv[2].innerHTML);
//刪除, 0開始, 刪除3個
aTmp.splice(0, 3);
//輸出
aDiv[2].innerHTML = aTmp.join()
};
//刪除第二至三項
aInput[6].onclick = function ()
{
aTmp = getArray(aDiv[2].innerHTML);
//刪除, 2開始, 刪除2個
aTmp.splice(1, 2);
//輸出
aDiv[2].innerHTML = aTmp.join()
};
//在第二頂後插入"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()
};
//替換第二項和第三項
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中的內容轉為數組
//str div對象
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" />
<input type="button" value="刪除第二至三項" />
<input type="button" value="在第二項後插入(orange, purple)" />
<input type="button" value="替換第二項和第三項" />
</body>
</html>
希望本文所述對大家的javascript程序設計有所幫助。
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