OT: help with text file?

[Matthew Flaschen]

Cameron Simpson wrote:
> On 17Jan2009 20:36, Matthew Flaschen <matthew.flaschen at gatech.edu> wrote:
> | Dave Stevens wrote:
> | > I have a sequence of lines of ASCII text of varying length, each of which ends 
> | > with an integer. Anyone have a quick and dirty way of getting these lines 
> | > copied to a new file with only the last number on each line of the new file?
> | 
> | How about:
> | grep -o -E [[:digit:]]+$ foo.txt > new_file.txt
> 
> I see your grep and raise you a sed:
> 
>   sed 's/.*[^0-9]//' foo.txt >new_file.txt

I see your sed and raise you an optimized but less readable grep.

    grep -oE [0-9]+$ foo.txt>new_file.txt

Matt Flaschen