<script language='Javascript'>
test();function test()
{
var tmp;
tmp = 'a2';
var re = /^a(\d+)$/;
re.exec(tmp);
alert(RegExp.$1);//这一行我想得到2,但得不到.为什么?
}
</script>
test();function test()
{
var tmp;
tmp = 'a2';
var re = /^a(\d+)$/;
re.exec(tmp);
alert(RegExp.$1);//这一行我想得到2,但得不到.为什么?
}
</script>
test();function test()
{
var tmp;
tmp = 'a2';
var re = new RegExp("^a(\\d+)$");
re.exec(tmp);
alert(RegExp.$1);//这一行我想得到2,但得不到.为什么?
}
</script>用new RegExp构造时,参数是字符串所以,"\"要用"\\"表示.
{
var tmp;
tmp = 'a2';
var re = new RegExp(/^a(\d+)$/);
re.exec(tmp);
alert(RegExp.$1);
}
{
var tmp;
tmp = 'a2';
var r = tmp.match(/^a(\d+)$/)
if(r) alert(r[1]);
}