Dear Monks,

Is there another way to have the intersection of two lists ? Thanks a lot

Here is my code 

#usr/bin/perl
use strict;

my $name_1 = q{list_1.txt};
my $name_2 = q{list_2.txt};

open my $INFILE_1, q{<}, $name_1 or die "Can't open $name_1 : $!";
open my $INFILE_2, q{<}, $name_2 or die "Can't open $name_2 : $!";


my @list_1;
while (my $line_1 = <$INFILE_1>){
    $line_1 =~ s/\s+$//;
    push @list_1, $line_1;
}    

my @list_2;
while (my $line_2 = <$INFILE_2>){
    $line_2 =~ s/\s+$//;
    push @list_2, $line_2;
}    

my @intersection;
my %count;

my $element;
my @two_lists = (@list_1,@list_2); 

print STDOUT "@two_lists\n";

foreach $element(@two_lists){
    $count{$element}++;
}

my $key;
my @KEYS = keys %count; 
foreach $key(@KEYS){
    if ($count{$key} == 1){
        print STDOUT "$key;$count{$key}\n\n";
    }    
}        

close $INFILE_1;
close $INFILE_2;

[download]
Here is the first file 
car
train
plane

[download]
Here is the second file 
boat
car
train

[download]

In reply to is there a more simple way to have the intersection of two lists ? by steph_bow

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