JavaScript数组各种常见用法实例分析

2019-11-20 11:55:42

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本文实例讲述了JavaScript数组各种常见用法。分享给大家供大家参考。具体如下：

运行效果如下图所示：

具体代码如下：

<!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 type="button" value="删除January(1)" /><input type="button" value="删除December(12)" /><div>0,1,2,3,4,5,6,7,8,9</div><input type="button" value="复制" /><input type="button" value="还原" /><div>red,green,blue,white,yellow,black,brown</div><input type="button" value="还原" /><input type="button" value="删除前三项" /><input type="button" value="删除第二至三项" /><input type="button" value="在第二项后插入(orange, purple)" /><input type="button" value="替换第二项和第三项" /></body></html>

希望本文所述对大家的javascript程序设计有所帮助。

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