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230.Advanced search and replace -- How to reverse all cases of letters in a text file?

User: editor -- 2008-07-21          << 229  231 >>
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Type: Advanced search and replace   
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How to reverse all cases of letters in a text file?
Input Sample:
This is JUST a test.
Output Sample:
tHIS IS just A TEST.
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. ctrl-o open source file.
2. ctrl-h open 'Replace' dialog:
set 'Replace with pattern' to:

3. Click 'Replace', done!

function replace($match,'A-Za-z','a-zA-Z',2) will make a mapping from A-Z to a-z, and a-z to A-Z, the last parameter "2" means make letter-to-letter mapping instead of str replace.

Screenshot 1:  Replace_Window

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