Hi Monks! I have a question regarding the sort function. Can you confirm to me that, having an hash '%hash', and wanting to sort its keys by key, hence returning a list of sorted keys (assuming a monodimensional hash, with numeric sorting), i should use:
sort { $a <=> $b } keys %hash
and if i wanted to sort it by its values, again obtaining a list of sorted keys:
sort { $hash{$a} <=> $hash{$b} } keys %hash
so far, so good.
Now, i want to sort my hash, but by its values, i use "values", and, to sort by value, i should use:
sort { $a <=> $b } values %hash
and if i want to sort by keys i use
sort { $hash{$a} <=> $hash{$b} } values %hash
Am I right? If not, please tell me what's wrong.
If I am, there must be some problem in the last sort, because it does not return me a list of values sorted by keys, it just does simply nothing (at least, in my real code, not this fictional example).

thanks in advance,
larss

In reply to Sort: By keys, values, and their returning values. by larsss31

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.