Problem with regex at start of line

[kaveh1000]

I am reasonably familiar with Regex and its implementation in LiveCode. I currently have a problem that relates to the start of string, i.e. using the caret: "^".

In the attached stack I am trying to remove all leading spaces from each line, using:

Code: Select all

put replacetext( \
         fld "Original",  \
         "(^ +)",  \
         "")  \
         into fld "Replacement"

The caret should tell the code to remove spaces only at the start of lines and nowhere else. But it does not match any string. Removing the caret of course removes all spaces.

I could use more complex constructions, e.g. "char before is a return", but I want to keep it simple.

Grateful for any ideas.

Regards
Kaveh

[Thierry]

Hi Kaveh,

Your regex will suppress *only* the first spaces of the beginning of the whole text !

Try this one instead:

"(?m)^(\s+)"

will do it on every line.

The clue hereis (?m) -> mode multi-line which changes the meaning of the caret.

Regards,

Thierry

[kaveh1000]

Thierry to the rescue! That works. I had never come across that!

Thank you as ever...

Regards
Kaveh

[Klaus]

I had no idea that one can use \ inside of the params of a function!?

[bogs]

Me either, that is awesome!

Thank you Thierry!

[dunbarx]

Klaus.

Neither did I. This works:

Code: Select all

on mouseUp
   answer doubleValue(25 +\
   25)
end mouseUp

function doubleValue var
   return var * 2
end doubleValue

But this does not:

Code: Select all

on mouseUp
   answer doubleValue(2\
   5 + 25)
end mouseUp

Craig

[kaveh1000]

I normally use the backslash breaks with multi-parameter functions. The indenting makes things more readable, especially when there is regex as a parameter!!