No output

Shell Programming and Scripting
1

All,
I have a small program which reads 2 text files. Text files has the below layout
dictionary
C_BOX LB_BOX
C_CHAIR LB_CHAIR
C_HAT LB_HAT

lookup
C_HAT
C_BOX
C_CHAIR

The program is below

#!/bin/bash
DICT=$2
exec < $1
while read f1
do
nawk -v fld=${f1} '/$1=fld/ { print fld $2}' $DICT
done

What I am trying is achieve is to generate a third file which will have the output.

file 3

C_HAT LB_HAT
C_BOX LB_BOX
C_CHAIR LB_CHAIR

I want to get the corresponding name and value for the "file1" fields from "dictionary". The sequence of occurence should also be maintained as it is in "file1"

thanks in advance...

2

Try...

 
nawk 'NR==FNR{arr[$1]=$2;next}{for(i in arr)if(i==$1)print $1,arr}' dict lookup
3

Try something like:

nawk -v fld="${f1}" '$1==fld { print fld" "$2}' $DICT

your rest code remains same to avoid changing the logic

4

Use only awk

awk 'NR==FNR{a[$1]=$0;next}{$0=a[$1]}1' dictionary lookup > file3
5

superb!!!! thanks guys :slight_smile:

6

One way to do it in Perl:

$
$ cat dictionary
C_BOX LB_BOX
C_CHAIR LB_CHAIR
C_HAT LB_HAT
$
$ cat lookup
C_HAT
C_BOX
C_CHAIR
$
$ perl -ne 'BEGIN {open(F,"dictionary");while(<F>){chomp; split; $x{$_[0]}=$_[1]} close(F)}
>           chomp; printf("%s %s\n",$_,$x{$_})' lookup
C_HAT LB_HAT
C_BOX LB_BOX
C_CHAIR LB_CHAIR
$
$

tyler_durden

7

something like this :

awk 'NR==FNR {a[$1]=$2;next } {if($1 in a) {b[$1]=$1" "a[$1];c[++n]=$1;next} } END { for(i=1;i<=n;i++) {print b[c]}}' file1 file2