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printing 3 files side by side based on similar values in rows

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# 1  
Old 12-18-2010
printing 3 files side by side based on similar values in rows

Hi I'm trying to compare 3 or more files based on similar values and outputting them into 3 columns.

For example:



The output should come out like this
file1     file2     file3
ABC              ABC
DEF    DEF         
           DER    DER

I know how to merge the 3 files into one but I don't know how to get the logic needed to output the above.
# 2  
Old 12-18-2010
Matches your example, maybe should be adapted to your exact needs :
bash code:
  1. #!/bin/bash
  2. cat file{1..3} | sort -u | while read
  3. do
  4.    for F in file{1..3}; do
  5.       printf "%-10s" "$(grep "$REPLY" $F)"
  6.    done
  7.    echo
  8. done
ABC                 ABC       
DEF       DEF                 
          DER       DER       

# 3  
Old 12-18-2010
Working on it for you in perl.

Do the files have the same number of lines in them and are there any commas, tabs, or special characters within the files? Thanks, John

---------- Post updated at 03:52 PM ---------- Previous update was at 03:31 PM ----------

If you still need a solution, let me know. However, it looks like frans has a shorter solution than my perl script. jjarrettc
# 4  
Old 12-18-2010
Thanks a lot for your help guys! I'll try to customize it to fit what i need
# 5  
Old 12-20-2010
my $n=0;
my @tmp = glob("*.txt");
for(my $i=0;$i<=$#tmp;$i++){
  my $file = $tmp[$i];
  open FH,"<$file";
    if(exists $hash{$_}){
     my @t = @{$hash{$_}->{VAL}};
     for(my $j=$#t+1;$j<=$i-1;$j++){
      push @{$hash{$_}->{VAL}},0;
     push @{$hash{$_}->{VAL}},1;
     push @{$hash{$_}->{VAL}},1;
  close FH;
foreach my $key (sort {$hash{$a}->{SEQ} <=> $hash{$b}->{SEQ}} keys %hash){
  my @tmp = @{$hash{$key}->{VAL}};
  my @t = map {my $tmp=($_ == 1)?$key:" ";$tmp;} @tmp;
  print join ",", @t;
  print "\n";

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