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This one uses the new(ish) treat-strings-as-file-handles feature (See Effective Perl Programming)
my $data = q(0 ASDF ASEE ASEE 13 DERG DREG 28 QWER QWER 42 WERT WERT WERT 55 QWEASD QWEASD QWEASD QWEASD ); open $hndl , "<", \(my $s = $data); open $out , ">", \(my $formatted = ''); my $substitute_field; READ_FILE: while (my $line = <$hndl>) { chomp $line; ## Ignore any lines that don't contain relevant text $line =~ /\S+/ or next READ_FILE; $line =~ /^\s*(\d+)(\s+)([A-Z]+)/ and do { $substitute_field = $1; print $out $substitute_field, $2 ,$substitute_field,"\n"; next READ_FILE; }; ## If we don't have a field to substitute move on defined $substitute_field or next READ_FILE; ## Must have valid line $line =~ s/^(\s*)([A-Z]+)/$1$substitute_field/; print $out $line,"\n"; } print $formatted; close $hndl; close $out;
In:
0       ASDF
        ASEE
        ASEE

13      DERG
        DREG

28      QWER
        QWER

42      WERT
        WERT
        WERT

55      QWEASD
        QWEASD
        QWEASD
        QWEASD
out:
0       0
        0
        0
13      13
        13
28      28
        28
42      42
        42
        42
55      55
        55
        55
        55

In reply to Re: Modify a txt file by mrstlee
in thread Modify a txt file by la

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