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Saving file edited whith sed

 
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# 8  
Old 06-26-2010
Quote:
Originally Posted by jim mcnamara
pseudocoder - doesn't alternation usually require '(pattern1|pattern2)' - the surrounding parentheses?
Obviously no Smilie
# 9  
Old 06-26-2010
Quote:
Originally Posted by Scrutinizer
Hi Eagl€, you probably mean:
Code:
egrep '>|^[AGC]*$' infile

But I do not think that works here, since then you filtering on the fact that there happens to be no T present on the lines with 3 characters, otherwise it would match lines with more than 3 of those characters as well.
Right, then T should be added but this time other lines can be matched too.

Code:
egrep '^>|^[A-Z]{3}$' infile

is generic Smilie
# 10  
Old 06-27-2010
@EAGLE,
It is generic, but with any regex pattern you have to wonder what minimum precision is required. In this case [A-Z] is ample precision IMO.

---------- Post updated at 11:18 ---------- Previous update was at 02:57 ----------
Quote:
Originally Posted by pseudocoder
Obviously no Smilie
Smilie There is no need for that..

Quote:
Originally Posted by jim mcnamara
pseudocoder - doesn't alternation usually require '(pattern1|pattern2)' - the surrounding parentheses? I've never tried it that way....
Hi Jim, with egrep you can leave out the outer parentheses if all the patterns are part of the alternation.
 
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