Processing 2 files with different field separators using awk

Question

Let\'s say I have 2 files :

$ cat file1
A:10
B:5
C:12

$ cat file2
100 A
50 B
42 C

I\'d like to have something like :

A 10          


        

Answer 1

You can try something like:

$ cat f1
A:10
B:5
C:12

$  cat f2
100 A
50 B
42 C

$ awk 'NR==FNR{split($0,tmp,/:/);a[tmp[1]]=tmp[2];next}$2 in a{print $2,a[$2],$1}' f1 f2
A 10 100
B 5 50
C 12 42

or set multiple field separators

$ awk -F"[: ]" 'NR==FNR{a[$1]=$2;next}$2 in a{print $2,a[$2],$1}' f1 f2
A 10 100
B 5 50
C 12 42