On Nov 23, 9:22 am, jwkr...@shaw.ca (John W. Krahn) wrote:
> shadow52 wrote:
> > Hey everyone,
>
> Hello,
>
> > I am trying to get just the last 3 numbers from the following number
> > from perl using regexs but I have not had no success so I was hoping
> > that I could get a little help on this. I just ordered the regex book
> > from oreilly so that hopefully in the future I will not have to ask a
> > question like this again.
>
> > The number is 0000000000000111
>
> > I was just wanting to get the last 3 digits from this number to be
> > able to get an exact word phrase from my already loaded Hash table
> > that I have created for various numbers that I will get the last 3
> > numbers from.
>
> To get the last three characters:
>
> $ perl -le'my $number = "0000000000000111"; my ( $last_3 ) = $number =~
> /(...)$/; print $last_3'
> 111
>
> Or:
>
> $ perl -le'my $number = "0000000000000111"; my $last_3 = substr $number,
> -3; print $last_3'
> 111
>
> Of course the regex version will ignore any newline at the end.
>
> To get the last three numerical digits only:
>
> $ perl -le'my $number = "0000000000000111"; my ( $last_3 ) = $number =~
> /(\d\d\d)$/; print $last_3'
> 111
>
> Or:
>
> $ perl -le'my $number = "0000000000000111"; my ( $last_3 ) = $number =~
> /.*(\d\d\d)/; print $last_3'
> 111
>
> \d\d\d could also be written as \d{3}.
>
> > Oh yeah all I was doing was putting this number in a
> > file and then passing it to perl on the command line incase that is
> > needed.
>
> I can not think of why that may be needed?
>
> John
> --
> The programmer is fighting against the two most
> destructive forces in the universe: entropy and
> human stupidity. -- Damian Conway
Hello Everyone,
Thanks for all the help all of them worked just what I needed . Also
Thanks John for all of the examples thatI could choose from.
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