Hello Dear Monks

I have made a script that works but I would like to generalise it. Could you give me some advice ? Thanks. The aim of the code is to equally redistribute the times of aircraft departures.

here is the input file

11:10 A1
11:30 E4
11:30 Z4
11:50 H5
12:02 H6
12:25 B2
12:25 A8
12:30 F3
12:30 E7
12:50 E15
12:55 E16
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Here is the output

11:00 A1
11:20 E4
11:40 Z4
11:59 H5
12:00 H6
12:10 B2
12:20 A8
12:30 F3
12:40 E7
12:50 E15
12:59 E16
[download]

here is my code

use strict;
use diagnostics;

my $infile = $ARGV[0];
open my $INFILE, q{<}, $infile or die;

my $outfile = "sliced_"."$infile";
open my $OUTFILE, q{>}, $outfile or die;


sub convert_time_in_mn {
  my ($ref_time)=@_;
  my @tab = split(":",$ref_time);
  #$value=$tab[0].$tab[1];  
  my $value=($tab[0]*60)+$tab[1];
  return $value;
}


my @slice_11_12_flights;
my @slice_12_13_flights;


while(my $line = <$INFILE>){
    $line =~ s/\s+$//;
    my $time = substr($line , 0, 5);
    my $time_mn = convert_time_in_mn($time);
    print STDOUT "time_mn is ${time_mn}\n";
    $line = "$line\n";
    if (${time_mn} <= 719){
        push @slice_11_12_flights, $line;
    }
    else{
        push @slice_12_13_flights, $line;
    }
}

my $nb_11_12 = @slice_11_12_flights;
my $nb_12_13 = @slice_12_13_flights;

# the interval number should be equal to the number of elements minus 
+one
my $NB_11_12 = $nb_11_12 -1;
my $NB_12_13 = $nb_12_13 -1;

# mean nb of seconds between two planes in the same slice
my $inter_sec_11_12 = 3600/$NB_11_12;
my $inter_sec_12_13 = 3600/$NB_12_13;

my $time_11_12 = 0;
my $time_12_13 = 0;

my @minutes;


foreach my $i(0..$NB_11_12){
    my $sec = $i * $inter_sec_11_12;
    print STDOUT "sec is $sec\n";
    my $min = int($sec/60); 
    
    # in order to avoid confusion
    if ($min == 60){
        $min = 59;
    }    
    
    if ($min =~ /^(\d)$/){
        $min = "0"."$1";
    }    
    
    
    my $time = join ":", "11", "$min";
    print STDOUT "time is $time\n";
    my $slice = $slice_11_12_flights[$i];
    print STDOUT "slice is $slice\n";
    my $former_time = substr($slice , 0, 5);
    $slice =~ s/$former_time/$time/;
    print $OUTFILE "$slice";
}


foreach my $i(0..$NB_12_13){
    my $sec = $i * $inter_sec_12_13;
    print STDOUT "sec is $sec\n";
    my $min = int($sec/60); 
    
    # in order to avoid confusion
    if ($min == 60){
        $min = 59;
    }    
    
    if ($min =~ /^(\d)$/){
        $min = "0"."$1";
    }    
    
    my $time = join ":", "12", "$min";
    print STDOUT "time is $time\n";
    my $slice = $slice_12_13_flights[$i];
    print STDOUT "slice is $slice\n";
    my $former_time = substr($slice , 0, 5);
    $slice =~ s/$former_time/$time/;
    print $OUTFILE "$slice";
}
[download]