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Asked: 2026-06-02T19:18:54+00:00

I’m trying to write a reg exp that matches the following code in a

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I’m trying to write a reg exp that matches the following code in a JSP:

="<%= "Index: " + index %>"

However if I write it in a general manner expressions on the same line that match this end up being combined:

value="<%= "items[" + Index + "].selected" %>" id="<%= "Checkbox" + Index %>"

Can someone help me figure out the reg exp to recognise the value and id tags separately so that I can put a search replace in to replace the outer double quotes with single quotes please?

Thanks,
Alexei Blue.

P.s.
So far I have this which isn ‘t specific enough:

"=<%=.*".*".*%>"
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1 Answer

  1. Editorial Team

    If you want to match the whole “<% %>” element including quotes, no matter what’s inside the tag (apart from %) I would use this regex:

    "<%=[^%]+%>"

    You will probably need to escape the quotes in the code like this: \"

    What it says is:

    • Match “<%
    • match everything that’s not a %
    • match %>”

    EDIT:

    If you are specifically interested only in the elements which have double quotes inside – use this:

    "<%=([^%]*"){2}[^%]+%>"
    • ([^%]*"){2}: match everything that’s not % (optional) and a double quote – repeat twice
    • [^%]+: match any remaining characters
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