Strip all attributes from an html and only return the tag name using regex

As the title says, how can I achieve the following in ru开发者_C百科by using regex or some other ruby magic?

Input

<a href="#" class="css-class">Link</a>
<img src="image.jpg" />

Desired Output

a
img

Thanks in advance

I don't know how regex matching is handled in ruby, but i'm pretty sure that you can retrieve groups out of the regex.

For your case the regex:

<([^\s]*).*(</.*>|/>)

should do the trick.

After using it on your inputstring there will be only the tag names in group #1 for every match.

I agree with Tomalak, but if you still want to go with the regex approach, you could use something like the following:

\<(?<tag>[^ ]+)[^\>/]*(\>[^\<]*</\k<tag>\>|/\>)

I tested it only with the C# regex engine, I hope it works for ruby, too.