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/添加最后一項 aInput[1].onclick = function () { aTmp = getArray(aDiv[0].innerHTML); bS2 ? //刪除最后一項, pop()方法 (aTmp.pop(), this.value = this.value.replace("刪除","添加"), bS2 = false) : //添加最后一項, 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="在第二項后插入(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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