in reply to How to get a value from a file and save in another file

How about

print("LA-1-00 LA-2-01 LA-03-2\n");

[download]

Sorry, but I don't see the pattern between your input and output. Did you mean to print out all those starting with LA-? If so, you missed LA-03-02. The following prints all the tokens starting with LA-

open(FILE, "< $filename")
or die("Can't open input file: $!\n");
my $text = do { local $/; <FILE> };
close(FILE);

print(join(' ', grep { /^LA-/ } split(/\s+/, $text)), "\n");

[download]

Update: Maybe LA-03-2 and LA-03-02 are considered duplicates, and you're trying to remove duplicates? If so, the following code should help:

open(FILE, "< $filename")
or die("Can't open input file: $!\n");
my $text = do { local $/; <FILE> };
close(FILE);

my %seen;
print(join(' ', grep {
   if (/LA-(\d+)-(\d+)/) {
      my $key = "LA-" . ($1+0) . "-" . ($2+0);
      $seen{$key}++ ? 0 : 1;
   } else {
      0
   }
} split(/\s+/, $text)), "\n");

[download]

Replies are listed 'Best First'.
Re^2: How to get a value from a file and save in another file
by Anonymous Monk on Apr 27, 2005 at 17:34 UTC
    Thank you for the help. I want to print out the first value that start with "LA-" for each record. In my example file there are 3 records and each record has 1 or 2 or more values. In my real file there Hundreds records.
[reply]
      use strict;
use warnings;

my $found_match = 0;

while (<DATA>) {
   s/\s+$//;

   if (/^\d/) {
      $found_match = 0;
   }

   if (!$found_match && /^\d*\s+(LA.*)/) {
      print("$1\n");
      $found_match = 1;
   }
}

__DATA__
1  LA-1-00
2  CON-1-0
   LA-2-01
3  LA-03-2
   LA-03-02

      [download]
[reply]
[d/l]

In Section Seekers of Perl Wisdom