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586.Advanced search and replace -- How to delete/remove all lines that appearred more than once?

User: editor -- 2010-08-11          << 585  587 >>
Hits: 2341
Type: Advanced search and replace   
Search all Advanced search and replace examples
How to delete/remove all lines that appeared more than once?
Input Sample:
line A 
line B 
line A 
line C
Output Sample:
line B 
line C
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. ctrl-o open source text file 
2. ctrl-h open replace window 
* set 'replace with pattern' to: 
* click 'advanced' page, set 'run following for each matched unit' to: 
3. click 'replace', done!

Screenshot 1:  Replace_Window

Screenshot 2:  Replace_Advanced_Window

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