Regex-not selector

Lets say that this whole thing down there is a string and I would like to match all those words within < and > who end with words dog or bird. It can be done also done by using regex like this:

<.+(dog|bird)>

But I am trying to select by using NOT selector. Only if it NOT ends with cat, it should be selected. Is it actual开发者_开发问答ly possible to select something that doesn't contain come word in regex?

<This is dog>
<This is also a dog>
<This is cat>
<Dog and cat>
<Where is dog>
<I am a bird>
<I am another bird>

Thanks,

Vizualni.

If we're talking about a flavor of regex that supports it, you can use negative lookahead. This:

<(?![^>]*(?:dog|cat)>).+>

will match angle-bracket-enclosed strings that do not end with dog or cat.

In addition to negative lookahead, you can also use negative lookbehind (match ">" that is not preceded by dog or cat):

<.+(?<!dog|cat)>