Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

comment on

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

The difference is in the fact that '*' provides access to all of the slots and the '$', '&', '@' provide access to specific slot.

I understand "normal" typeglob syntax, i.e. that *color represents all variables with the name color. What I don't quite grasp is the syntax *{"color"}. Are the braces causing something to be dereferenced? Because as I understand it, when I write:

 @{"color"}

perl interprets that as an attempt to dereference a string. So perl treats the string "color" as a symbolic reference, which causes perl to go to the symbol table and look up "color", and the @ tells perl to grab what's in the ARRAY slot for "color".

Should I be interpreting:

*{"color"}

to mean: there is an attempt to dereference a string, so perl treats the string "color" as a symbolic reference and therefore perl looks up "color" in the symbol table. Then the * tells perl to create(?) a color typeglob? Or does the color typeglob already exist? I would like for the second choice to be true--for consistency, i.e. 'grab' something already there, rather than 'create' something.


In reply to Re^6: typeglob/symbolic reference question by 7stud
in thread typeglob/symbolic reference question by 7stud

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, 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
  • 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.
  • 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 chilling in the Monastery: (5)
    As of 2021-01-22 10:15 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?