Re: [PLUG] scanning a line

["Kyle R . Burton" <mortis@voicenet.com>]

> hi,
> we all love grep and that's for a reason. however, sometimes i wish to
> scan a single line for a pattern and only get the pattern back. simply
> example:
> 
> the pattern "[0-9]*" should return the string in the second column
> when applied to the string in the first column:
> 
> aaaa9879aaaaaa0870aaaaaaaaaaa09    =>  9879 0870 09
> aa908798986986aaaaaaaaaaaaaaaaa    =>  908798986986
> 
> in the first case, it would be even better to sort of include some
> 'cut' features, such that i could say give me the 2nd occurrence of
> the pattern, and it would only return 0870.
> 
> is this possible? i.e. is there a command to do this? or a simple
> hack? this needs to be shell script...

Try awk or perl.  I don't know awk, but this should do it for perl:


perl -ne 'if(@a=(/\d+/g)) { print join(" ",@a),"\n"; }' < file.txt
cmd | perl -ne 'if(@a=(/\d+/g)) { print join(" ",@a),"\n"; }'

k

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