JavaScript擷取不重複隨機數

來源:互聯網
上載者:User

 
<!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>隨機不重複_www.jb51.net</title>
<script type="text/javascript">
var count=3000;
var original=new Array;//原始數組
//給原始數組original賦值
for (var i=0;i<count;i++){
original[i]=i+1;
}
var d1=new Date().getTime();
original.sort(function(){ return 0.5 - Math.random(); });
for (var i=0;i<count;i++){
document.write(original[i]+" , ");
}
var d2=new Date().getTime();
document.write("運算耗時"+(d2-d1));
</script>
</head>
<body>
<a href=http://www.jb51.net>指令碼之家</a>
</body>
</html>

詳細出處參考:http://www.jb51.net/article/15747.htm

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