I love to use the one you recommend but I am just a beginner so not sure how to apply See if you can help me to edit my code below I like to change the value in column one to a fix value. Any number should reduced by 1 except "1" becomes "P". I am trying to learn how to use map or grep not creating the hash, that the guys showed me. Thanks Macy 


"Header1","Header2",Header3"
"A123","1","valueB1"
"B234","1","valueB2"
"C345","2","valueB3"
"D456","3","valueB4"
"E567","4","valueB5"
"F678","5","valueB6"

[download]

and the output should be

"Header1","Header2",Header3"
"A123","P","valueB1"
"B234","P","valueB2"
"C345","1","valueB3"
"D456","2","valueB4"
"E567","3","valueB5"
"F678","4","valueB6"

[download]

here is my code

open my $fh1,'<',"NRoomch.txt";
my @a = <$fh1>; 
my @arr;
 for  $i (0..$#a){
  my @b = split(/,/,$a[$i]);
    for $j (0..$#b) {
        $b[$j] =s~/"//g;
if ($j==1 && my @arr = grep { $_ =~ /\"1"$/ } @b);
        @arr = map{$_ = "P"} @arr;            
        else
        @arr = map {$b[$j] - 1} (1..$#b);
        print @arr;
    };
 };
close($fh1);

[download]

In reply to Re^4: Replace value in the text file by mhoang
in thread Replace value in the text file by mhoang

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