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I have edited your code:

#!/usr/bin/perl
use Modern::Perl; #does an implict use strict; use warnings and activa
+tes "new" features
no warnings qw /uninitialized/;

my @result; # declares the array we will use to store the results

{ # starts a block
    open my $INPUTFILE, '<', '/Users/ts/numbers.txt' or die "File erro
+r: input file: $!";
    while (<$INPUTFILE>) {
        chomp; #removes new line
        my ($index, $value) = split /\t/; # splits each record at the 
+tab "\t" -character
        $result[$index] = $value; # and store the value in the array a
+t the right place
    }
} # ends the block, $INPUTFILE goes out of scope and closes the fileha
+ndle automatically

$result[3000050] = 0 unless $result[3000050];

{ # starts a block
    open my $OUTPUTFILE, '>', '/Users/ts/full_number.txt'or die "File 
+error: output file: $!";
    while (my ($index, $value) = each @result) {
        next if $index == 0;
        say $OUTPUTFILE, "$index\t", $value+0; # saves the results in 
+a >>indexnumber tab value<< format
    }
} # ends the block, $OUTPUTFILE goes out of scope and closes the fileh
+andle automatically

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CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In reply to Re^5: Completing a list/ array? by CountZero
in thread Completing a list/ array? by Taylorswift13

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