Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
Dominus,

Thank you for the explanation. Let me see if I have this right:

  1. There are two contexts in which an expression can be evaluated: scalar and list.
  2. There are three major types of variables in perl: scalars, arrays, and hashes. 'Scalar' variable type and 'scalar' context are not the same thing, although scalar variables usually impose scalar context.
  3. Expressions are either constants, the values of variables (either lvalue or rvalue), or the results of functions which may take other expressions as arguments.
So my principle error lies in trying to compare lists and arrays, which are different types of things. The confusion is partly caused by 'scalar' being both a context and a expression variable, and thus capable of being compared with either. Hence, comparisons are not transitive!

Is this right?

-Ton
-----
Be bloody, bold, and resolute; laugh to scorn
The power of man...


In reply to Re: Re: Scalars, Lists, and Arrays by ton
in thread Scalars, Lists, and Arrays by ton

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (7)
    As of 2014-12-20 08:56 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (95 votes), past polls