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replacing all 4 first upper char of every rec to lowercase ?

 
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# 1  
Old 08-02-2006
replacing all 4 first upper char of every rec to lowercase ?
I have a file where some records have been updated the wrong way and need to fix it quickly since the amount can be alot.

Every record where any of the first 4 characters are in upper case need to be changed to lowercase.

Records can have '#' in position-1 for comments. These musn't be changed.

How do I do it with VI ?

If not with VI, with what and how ?
Last edited by Browser_ice; 08-02-2006 at 11:34 AM.. Reason: error
# 2  
Old 08-02-2006
can you move this thread to the right place ?

it got posted in the wrong place by mistake
# 3  
Old 08-02-2006
Gosh, I'm not sure if this can be done in vi but here's how to do it via awk:

Code:
nawk '{
    sub(/^[A-Z][A-Z][A-Z][A-Z]/, tolower(substr($0,1,4)) substr($0,5),$0)
} 1' yourfile > newfile

 
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