awk or sed - Convert 2 lines to 1 line


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# 1  
awk or sed - Convert 2 lines to 1 line

Hi,

Just trying to get to grips with sed and awk for some reporting for work and I need some assistance:

I have a file that lists policy names on the first line and then on the second line whether the policy is active or not.

Code:
Policy Name:       Policy1
Active:            yes
Policy Name:       Policy2
Active:            yes
Policy Name:       Policy3
Active:            no
Policy Name:       Policy4
Active:            yes
Policy Name:       Policy5
Active:            no

What I'm trying to get to is a list of policy names and whether or not they are active on the same line:

Code:
Policy1 yes
Policy2 yes
Policy3 no
Policy4 yes
Policy5 no

Would appreciate any pointers.

Thanks.
# 2  
Code:
awk 'NR%2 {keep=$2; next}
       !NR%2 {print keep, $2} ' inputfile > outputfile

This User Gave Thanks to jim mcnamara For This Post:
# 3  
Or if you are having problems with awk.
Code:
while read a b
do
   read c d
   echo $b $d
done <inputfile

This User Gave Thanks to jgt For This Post:
# 4  
Hi.

An alternate with sed , cut , paste:
Code:
#!/usr/bin/env bash

# @(#) s1	Demonstrate combine lines fro specific column (field).

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C sed cut paste

FILE=${1-data1}
pl " Input data file $FILE:"
cat -A $FILE

pl " Results of sed, cut, paste:"
sed 's/   */\t/g' $FILE |
cut -f2 |
paste - -

pl " Same thing, compressed with \"Process Substitution\":"
cut -f2 <( sed 's/   */\t/g' $FILE ) |
paste - -

exit 0

producing:
Code:
% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
bash GNU bash 3.2.39
sed GNU sed version 4.1.5
cut (GNU coreutils) 6.10
paste (GNU coreutils) 6.10

-----
 Input data file data1:
Policy Name:       Policy1$
Active:            yes$
Policy Name:       Policy2$
Active:            yes$
Policy Name:       Policy3$
Active:            no$
Policy Name:       Policy4$
Active:            yes$
Policy Name:       Policy5$
Active:            no$

-----
 Results of sed, cut, paste:
Policy1	yes
Policy2	yes
Policy3	no
Policy4	yes
Policy5	no

-----
 Same thing, compressed with "Process Substitution":
Policy1	yes
Policy2	yes
Policy3	no
Policy4	yes
Policy5	no

The sed converts 3 or more blanks to TABs, the cut extracts column (field) 2, and the paste combines 2 lines into one.

If the whitespace in the results does not show up on your display, rest assured that the tokens are separated by a TAB. You can copy and paste them to see it.

See man pages for details.

Best wishes ... cheers, drl

( edit 1: correct minor spelling errors )

Last edited by drl; 04-28-2012 at 12:25 PM..
These 3 Users Gave Thanks to drl For This Post:
# 5  
Code:
awk '{ORS=(ORS==RS)?FS:RS; print $NF}' infile

These 2 Users Gave Thanks to Scrutinizer For This Post:
# 6  
Using cat, cut, tr and paste:

Code:
cat filename|cut -d':' -f2|tr -d ' '|paste -s -d" \n" -

This User Gave Thanks to elixir_sinari For This Post:
# 7  
A perl:
Code:
perl -ne '/Policy Name:\s*(\S+)/;$pol=$1;print $pol." ".$1."\n" if /Active:\s*(\S+)/' infile

This User Gave Thanks to Klashxx For This Post:
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