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778.Random word generator -- How to remove around 1/2 lines randomly from a large text files?

User: editor -- 2011-05-11          << 777  779 >>
Hits: 2304
Type: Random word generator   
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Description:
How to remove around 1/2 lines randomly from a large text files?
Input Sample:
line1 
line2 
line3 
line4 
line5 
line6 
...
Output Sample:
line2 
line3 
line6 
...
Answer:
Hint: You need to Download and install "Replace Pioneer" on windows platform to finish following steps.
1. ctrl-o open the text file 
2. ctrl-h open 'replace' window 
* set 'replace unit' to 'Line' 
* set 'if' to: 
 
3. click 'replace', done! 
4. ctrl-s save to file.

Screenshot 1:  Replace_Window


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