perl checking if a number is not int not working

Question

Hello I have a matrix which contains floats and int numbers I want to print it to a file in a way if it's not integer print the value rounded to 1 number after float. Below is my code

use Scalar::Util::Numeric qw(isint);

    for ( $i = 0 ; $i < $#matrix ; $i++ ) {
    for ( $j = 0 ; $j < $#{ $matrix[0] } ; $j++ ) {
        if (not isint $matrix[$i][$j] ) {

            printf MYFILE ("%.1f",$matrix[$i][$j]{score});
        }
        else {
            print MYFILE $matrix[$i][$j]{score}.' ';
        }
    }
    print MYFILE "\n";
}

The problem is that this code output write everything as float even if it is an integer. How to fix it ?

Answer 1

Here is my comment --> answer:

I guess $matrix[$i][$j] is a reference to a hash because of $matrix[$i][$j]{score} used in print statement. So it 's never an int.

I'd do (with some fixes):

for ( my $i = 0 ; $i < $#matrix ; $i++ ) {
#   __^^
    for ( my $j = 0 ; $j < $#{ $matrix[$i] } ; $j++ ) {
    #                                __^^
        if (not isint $matrix[$i][$j]{score} ) {
        #                          __^^^^^^^
            printf MYFILE ("%.1f",$matrix[$i][$j]{score});
        }
        else {
            print MYFILE $matrix[$i][$j]{score}.' ';
        }
    }
    print MYFILE "\n";
}

And don't forget:

use strict;
use warnings;

in all your scripts, always.