Re: use of awk instead of complex multielement commands (was Re: 'grep -o -m' (was Re: Can't mount CD image of Win95 game))

[Lee <ler762@gmail.com>]

On 12/20/22, David <bouncingcats@gmail.com> wrote:
> On Tue, 20 Dec 2022 at 22:04, David <bouncingcats@gmail.com> wrote:
>> On Tue, 20 Dec 2022 at 22:02, David <bouncingcats@gmail.com> wrote:
>
>> > $ echo -e '100:CD001\n200:CD001' | awk 'BEGIN { FS=":" } /CD001/ &&
>> > NR==1 { print $1 - 50 }'
>> > 50
>>
>> Oops, my mistake, that's not the solution. Give me another minute and I
>> will post a better one one.
>
> The below does a better job:
> (command should be all on one line)
>
> $ echo -e '100:CD001\nXXX\n200:CD001' | awk 'BEGIN { FS=":" ; done=0 }
> /CD001/ && done==0 { print $1 - 50 ; done=1 }'
> 50

You can do it without flags:

$ echo -e '100:CD001\nXXX\n200:CD001' | awk -F: '/CD001/ { print $1 -
50 ; exit }'
50