Question

I have question about regexp in TCL.
How i can find and change some text in TCL string variable with regexp function.
Example of the text:
/folder/folder2/test-c+a+t -test1 -test2
I want to receive:
/folder/folder2/test-d+o+g

Or for example it can be just:
test-c+a+t
and i want to recieve:
test-d+o+g

Sorry for this addition:
In this situation:
/test-c+a+t/folder2/test-c+a+t -test1 -test2
i want to recieve:
/test-c+a+t/folder2/test-d+o+g -test1 -test2

Answer 1

% set old {/folder/folder2/test-c+a+t -test1 -test2}
/folder/folder2/test-c+a+t -test1 -test2
% set new [regsub {(test)-c\+a\+t.*} $old {\1-d+o+g}]
/folder/folder2/test-d+o+g

Note the literal + symbols need to be escaped because they are regular expression quantifiers.

http://tcl.tk/man/tcl8.5/TclCmd/re_syntax.htm
http://tcl.tk/man/tcl8.5/TclCmd/regsub.htm