> Not only is that 6 of each number instead of 3, but the order is all messed up. Any idea what's going on here?

A quick note about order -- arrays will stay in the order you assign them in, but hashes may not. If you assign 
$array[0] = "foo"

[download]
Then the value foo will always be in the first position in the array, unless you later reassign it in some way.

However, hashes are a bit different. Whenever you have a hash, Perl put's them in whatever order it finds easiest to store them in. So if you assign:

$hash{foo} = "abc";
$hash{bar} = "xyz";

[download]
and you later run: 
@somearray = keys %hash

[download]
You cannot expect the key 'foo' to be returned first and 'bar' to be second. The only way to guarantee your output here is to run the command through something like sort: 
@somearray = sort(keys %hash);

[download]
-Eric

In reply to Re: Re: Re: Stuck while learning about the hash by andreychek
in thread Stuck while learning about the hash by Stamp_Guy

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.