Hello again!
Here's another question. Same Calc Guide 6.2:
Hi Celia,
I am not sure that the paragraph is obsolete.
Taking your example a little further, suppose one of the cells in the range B1:B13 contains the string "$Celia".
* Firstly, let us assume that "No wildcards or regular expressions in
formulas" is selected on the Tools > Options > LibreOffice Calc >
Calculate dialog. Then the formula =COUNTIF(B1:B13,"$Celia") should
give the expected value of 1.
* If we now select "Enable regular expressions in formulas" on the
Tools > Options > LibreOffice Calc > Calculate dialog, then the same
formula (=COUNTIF(B1:B13,"$Celia")) gives the answer 0. Why? Because
the $ is a special character.
* With regular expressions still enabled, the formula
=COUNTIF(B1:B13,"\$Celia") gives the answer 1 again. So the
backslash is required before the $ so that the regex processor does
not treat it as a special character.
I hope this makes sense and answers your question.
Regards,
Steve Fanning