Question

I need to create a RegEx (that works in Eclipse’s search/replace) that will match a group of letters only if a different match occurs anywhere prior in the same sentence.

Specifically, I need to match .css only if it occurs in the same line that includes jsSrc.

Eclipse doesn’t support indefinite lookbehinds.

Example:

<link rel="stylesheet" type="text/css" href="<% { out.print( jsSrc( request, "/builder/builder.css" />

Attempted regEx:

\.css(?<=jsSrc)

Does not produce a match of .css

Answer 1

You used the lookbehind ?<= the wrong way, here is the sample from book Mastering Regular Expression: provide you have string see Jeffs book, and you replace (?<=\b Jeff)(?=s\b) with ', you will get see Jeff's book

In your case, there’s no need to use lookbehind:

jsSrc.*\.css

works for me.
Maybe you want replace only .css part with XXX, then you can do it like this:
In Find: field, input (jsSrc.*)\.css and in Replace with: field , input \1XXX