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717.Advanced search and replace -- How to join every 20 emails into one group that delimitered by semicolon?

User: editor -- 2011-02-15          << 716  718 >>
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Type: Advanced search and replace   
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How to join every 20 emails into one group that delimitered by semicolon?
There are many email addresses, each one occupies a single line, how to join them into groups, each group has 20 emails that seperated by semicolon?
Input Sample:
Output Sample:;;...;;...
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. ctrl-o open text file that contains email addresses
2. ctrl-h open replace window
* set 'search for pattern' to:

* set 'unit number filter' to:
(means numbers not equal to 20,40,60,...)
* set 'replace with pattern' to a single semicolon:

3. click 'replace', done!

Note: the operation above means change the newline to semicolon if the line_no is not 20,40,60,80,...

Screenshot 1:  Replace_Window

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