Hi! Monks,
Can I please ask for your wisdom? I want to print the hash keys in numerical order, but my short script sorts keys in ASCII order. I was wondering if you could advice me on this. A second question is that I am planning to run this script on a file that contain 10-15 million lines. Do you think this is the best way of doing it. I am just trying to calculate the coverage on each base position. Thank you for your help! 

 
use warnings;
use strict;
use 5.010;
my %base_positon;

while(<DATA>){
    my ($chr, $start, $end)= split;
    $base_positon{$_}++ for ($start..$end);
}

# while( my($key, $value) = each %base_positon){
#     say $key,"\t",$value;
# } 
foreach my $key (sort(keys %base_positon) ){
    say $key,"\t", $base_positon{"$key"};
}


__DATA__
chrM    0    49    M01193:66:000000000-A386C:1:1112:20711:7517    0   
+ +
chrM    0    49    M01193:66:000000000-A386C:1:1112:12448:7530    0   
+ +
chrM    0    46    M01193:66:000000000-A386C:1:2108:26167:23502    0  
+  +
chrM    0    46    M01193:66:000000000-A386C:1:1101:17077:1444    0   
+ -
chrM    0    50    M01193:66:000000000-A386C:1:1101:17602:1741    42  
+  +
chrM    0    46    M01193:66:000000000-A386C:1:1101:13807:1866    0   
+ +
chrM    0    46    M01193:66:000000000-A386C:1:1101:16360:2204    0   
+ -
chrM    0    46    M01193:66:000000000-A386C:1:1101:13075:2236    0   
+ -
chrM    0    46    M01193:66:000000000-A386C:1:1101:15485:2329    0   
+ -
chrM    0    50    M01193:66:000000000-A386C:1:1101:13054:2607    42  
+  -

[download]

In reply to How to sort hash keys numerically? by rnaeye

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.