字符串连接追加字符串:使用s+=anotherStr操作,不要使用s=s+anotherStr
连接多个字符串:应该写成s+=a+b+c,不要s+=a;s+=b;s+=c
收集字符串:使用JavaScript数组来收集再用join方法连接起来
例如:
var buf = new Array();
for(var i = 0; i < 100; i++) { buf.push(i.toString()); }
var all = buf.join("");
连接多个字符串:应该写成s+=a+b+c,不要s+=a;s+=b;s+=c
收集字符串:使用JavaScript数组来收集再用join方法连接起来
例如:
var buf = new Array();
for(var i = 0; i < 100; i++) { buf.push(i.toString()); }
var all = buf.join("");
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title></title>
<script type="text/javascript">
function test1()
{ var d1 = new Date();
var innerHtml = ' <table> <tbody> ';
var i = 0;
for (var i = 0; i < 1000; i++)
{
innerHtml += ' <tr> ';
innerHtml += ' <td> ' + i + ' </td> ';
for (var j = 0; j < 2; j++)
{
innerHtml += ' <td> ';
innerHtml += 'abc';
innerHtml += ' </td> ';
}
innerHtml += ' </tr> ';
}
innerHtml += ' </tbody> </table> ';
var d2 = new Date();
alert(d2.getTime()-d1.getTime()); document.getElementById("aaa").innerHTML = innerHtml;}
function test2()
{
var d1 = new Date();
var buf = new Array();
buf.push(' <table> <tbody> ');
for (var i = 0; i < 1000; i++)
{
buf.push('<tr><td>')
buf.push(i.toString())
buf.push('</td>');
for (var j = 0; j < 2; j++)
{
buf.push('<td>')
buf.push('abc')
buf.push('</td>');
}
buf.push('</tr>')
}
buf.push('</tbody> </table>'); var str = buf.join("");
var d2 = new Date();
alert(d2.getTime()-d1.getTime());
document.getElementById("aaa").innerHTML = str;
}</script>
</head>
<body>
<input id="Button1" type="button" value="test1" onclick ="test1();"/>
<input id="Button1" type="button" value="test2" onclick ="test2();"/>
<div id="aaa"></div>
</body>
</html>