[102410] in RedHat Linux List
RE: parsing text files
daemon@ATHENA.MIT.EDU (Rick L. Mantooth)
Wed Dec 2 21:46:53 1998
Date: Wed, 2 Dec 1998 20:47:59 -0600 (CST)
From: "Rick L. Mantooth" <rickdman@cyberramp.net>
To: Ed Lazor <elazor@hcs.state.or.us>
cc: redhat-list@redhat.com
In-Reply-To: <NCBBKAHLNJCALPEJDMAECEAJCEAA.elazor@hcs.state.or.us>
Resent-From: redhat-list@redhat.com
Reply-To: redhat-list@redhat.com
Ed,
Oh for the world to be easier...;)
File one:
abc 123 LineOne
def 456 LineTwo
ghi 789 LineThree
$ nawk '{print $1}' one
abc
def
ghi
(Ah, life is grand)
File two:
ab c 123 LineOne
de f 456 LineTwo
gh i 789 LineThree
^ is a SPACE
$ nawk 'BEGIN{FS=" "}{print $1}' < two
^^^^^ is a TAB
will give the results:
ab c
de f
gh i
Now for a little fun.
Assuming TAB is the Field Separator for the columns and words
with spaces between them belong in the same field. (ass_u_me)
(Above nawk would work here also)
File three:
a b c 123 Line One
de f 456 LineTwo
gh i 7 89 Line Three
$ sed -e 's/ /_/g' three | nawk '{print $1}' | sed -e 's/_/ /g'
a b c
de f
gh i
Let sed swap the SPACES to _ , hand it off to nawk and then let
sed swap _ back to SPACE.
Note:
Not *thoroughly tested*, just some quickies.
Rick
On Wed, 2 Dec 1998, Ed Lazor wrote:
>
> You're right and you're wrong. It turns out that the column of
> information I was actually pulling information from only had one word -
> so I lucked out *grin*. This wouldn't have worked in the example I gave
> though if I were trying to pull the person's last and first name because
> they are separate words and would have been parsed into separate
> variables. So out of curiosity, how would have you gone about
> separating the column if it had multiple words and the number of words
> varied?
>
--
Rick L. Mantooth rickdman@cyberramp.net
http://www.cyberramp.net/~rickdman
I live with FEAR and sometimes she lets me go fishing!
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