I use hash of hashes and maybe many layer of hashes,and I often run into the error message like in my title! now I have some codes as follows

    #!/bin/perl -w
    use strict;
    
    my $site_file=$ARGV[0];

    #input the methylation site info
    my %site_info=();
    open(IN_site,"<$site_file");
    while(<IN_site>)
    {
        chomp;
        my @arr=split(/\t/,$_,4);
        if($arr[0] eq "MULTI"){next;}
        my @chr_temp=split //,$arr[0];
        for(1..3)
        {
            shift(@chr_temp);
        }
        $arr[0]=join("",@chr_temp);
        $site_info{$arr[0]}{$arr[1]}{"strand"}=$arr[2];
        $site_info{$arr[0]{$arr[1]}}{"value"}=$arr[3];
    }
    close IN_site;

[download]

i try to use hashes of hashes of hashes to input my $site_flie, and the all the lines have the formats as follows:

chr16 28797601 - 0.777877

I use a lot of there kinds of hashes and this kind of problem often happens,please help me!

Thanks in advance!

I do not want remove use strick

In reply to Can't use string ("16") as a HASH ref while "strict refs" in use by thudzj

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