[yunqa.de] Re: Converting upper case strings to lower case with regular expression
- From: Sheri <silvermoonwoman@xxxxxxxxxxx>
- To: yunqa@xxxxxxxxxxxxx
- Date: Wed, 25 Nov 2009 16:54:29 -0500
Jim Bretti wrote:
Sorry I didn't explain that better.
My application allows the user to do text manipulations using regular
expressions. The application builds search/replace expressions based on match
patterns and format patterns supplied by the user. So what I'm looking for is a
way for the user to supply a match pattern that matches upper case strings in
the text, and have the strings converted to lower case.
For example:
Match Pattern: ([A-Z]{3,})
Format Pattern: LowerCase($1)
So if there was a LowerCase function like this, this expression would locate
upper case strings in the text 3 characters or longer, and convert to lower case.
I'm just wondering if there is a way to do this without needing to set up
something in my app to handle case conversions.
Jim
Delphi Inspiration wrote:
> At 18:45 25.11.2009, Jim Bretti wrote:
>
>
>> Is it possible to search for upper case strings and convert to lower case, without coding the case conversion?
>>
>
> I am not sure what exactly you want to achieve. Can you please elaborate?
>
> Ralf
DIRegex is used in an editor I use. I and others still wish for this
capability. From an exchange we had a couple years ago:
>>> this is a suggested enhancement: A few other programs
>>> I use or helped design allow "$" to be optionally followed by u,
>>> U, l, L, t or T to cause the string referenced to be forced to
>>> upper, lower or title case in output.
>>
>>
>> I already though about case modifiers, but did not add them
>> because I could not find a regex replace syntax standard.
>
>
> I would encourage you to reconsider. Whatever syntax you choose
> would become the standard for your users (and their users).
> There's no problem making case alterations during substitutions
> in Perl, but Perl evaluation is not available to a PCRE based
> operation. In PHP you can use a preg_replace_callback to achieve
> it. Both AutoHotkey and PowerPro use the single letter case
> signals after the dollar sign, which is really nice and easy.
> Text case is both natural and universally needed at one time or
> another when making regex replacements.
Regards,
Sheri
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