正则 问题

Question

arr=" <title>1 </title>dfsdfsdf <title>2 </title>fsffd <title>3 </title>"; var arr = arr.match(/ <title>(.*?) <\/title>/i); 
alert(arr[1]); 
上面的有个错误

Answer 1

g是所有
<script>
arr=" <title>1 </title>dfsdfsdf <title>2 </title>fsffd <title>3 </title>"; var arr = arr.match(/ <title>(.*?) <\/title>/gi); 
alert(arr.join('\n')); 
</script>

Answer 2

s=" <title>1 </title>dfsdfsdf <title>2 </title>fsffd <title>3 </title>";
re= / <title>(.*?) <\/title>/ig;while(re.test(s)){
alert(RegExp.$1)
}

Answer 3

你没全局匹配？var arr = arr.match(/ <title>(.*?) <\/title>/gi); 即可