用正则表达式过滤每个数组项

Question

I have this regex that converts any # in a string to a hash tag array

myArr= myStr.match(/#\S+/g);

I also have a this to filter out from a string anything other than alpah numeric minus underscore.

myStr= myStr.replace(/[^a-zA-Z0-9_]/g, "");

But now i want to combine these 2 to make sure that each of the items in that array contain only alpha numeric values including underscore and the # in the begining.

Can anyone help out please, thank you.

Answer 1

Why so complicated?

myArr = myStr.match(/#[a-z0-9_]+/gi);

EDIT: I misunderstood your intention. Here's a slightly less simple, but altogether more efficient, solution:

myArr = myStr.replace(/#\S+/g,function(m) {
    return "#"+m.replace(/[^a-z0-9_]+/gi,"");
}).match(/#\S+/g);