m to n or just n
in [Shell]
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From: superpollo on 10 Jan 2010 11:42 mop2 ha scritto: > On Sun, 10 Jan 2010 14:06:29 -0200, superpollo <utente(a)esempio.net> wrote: > >> still, i would use sed *after* i checked input in my script that uses >> the sed script in turn (maybe using echo | grep). >> > > > > $ p(){ [ "${1//[0-9]/}${2//[0-9]/}" ]&&echo only numbers >&2&&return > 1;sed -n $1${2//$2/,$2}p;} yea like this! a veritable sed fan, alright? btw (offtopic), are there troff/pic/eqn users down here? bye
From: Ed Morton on 10 Jan 2010 12:00 On 1/10/2010 10:42 AM, superpollo wrote: > mop2 ha scritto: >> On Sun, 10 Jan 2010 14:06:29 -0200, superpollo <utente(a)esempio.net> >> wrote: >> >>> still, i would use sed *after* i checked input in my script that uses >>> the sed script in turn (maybe using echo | grep). >>> >> >> >> >> $ p(){ [ "${1//[0-9]/}${2//[0-9]/}" ]&&echo only numbers >&2&&return >> 1;sed -n $1${2//$2/,$2}p;} > > yea like this! > > a veritable sed fan, alright? That's not sed, it's shell, the sed part didn't change. > btw (offtopic), are there troff/pic/eqn users down here? There's a few of us around, but it's been a long, long time.... Ed.
From: mop2 on 10 Jan 2010 17:56 On Sun, 10 Jan 2010 14:42:10 -0200, superpollo <utente(a)esempio.net> wrote: > mop2 ha scritto: >> On Sun, 10 Jan 2010 14:06:29 -0200, superpollo <utente(a)esempio.net> wrote: >> >>> still, i would use sed *after* i checked input in my script that uses >>> the sed script in turn (maybe using echo | grep). >>> >> >> >> >> $ p(){ [ "${1//[0-9]/}${2//[0-9]/}" ]&&echo only numbers >&2&&return >> 1;sed -n $1${2//$2/,$2}p;} > > yea like this! > > a veritable sed fan, alright? No, as Ed Morton said, that is just shell code before same sed command The sed command is based on one of pks's suggestions For very small files, an option using only shell resources may be enough, and even faster, if sed is not already in disk's cache: p(){ [ ! "$1" ]||[ "${1//[0-9]/}${2//[0-9]/}" ]&&echo need 2 numbers >&2&&return 1 x=0;z=$2;z=${z:=$1};while read;do x=$[x+1] [ $x -ge $1 -a $x -le $z ]&&echo "$REPLY" done } $ seq 9|p need 1 or 2 numbers $ seq 9|p 4 4 $ seq 9|p 4 6 4 5 6 $ seq 9|p 4 oops need 1 or 2 numbers $
From: Arcege on 11 Jan 2010 12:09
On Jan 10, 11:42 am, superpollo <ute...(a)esempio.net> wrote: > mop2 ha scritto: > > > On Sun, 10 Jan 2010 14:06:29 -0200, superpollo <ute...(a)esempio.net> wrote: > > >> still, i would use sed *after* i checked input in my script that uses > >> the sed script in turn (maybe using echo | grep). > > > $ p(){ [ "${1//[0-9]/}${2//[0-9]/}" ]&&echo only numbers >&2&&return > > 1;sed -n $1${2//$2/,$2}p;} > > yea like this! > > a veritable sed fan, alright? > > btw (offtopic), are there troff/pic/eqn users down here? > > bye Yes, there are still some *roff/eqn users around. Never really used pic much. -Arcege |