Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
  • Okay, now in applying this further to Perl specifically, is a list (in distinction from an array or a hash) an entity? It seems to me it is not, but rather a value like your string "hello world.\n" that must be placed within an entity in order to be usable.

If I'm understanding you correctly, the kind of list you're talking about would be a value, and yes, you'd store it in an entity like an array or a hash.

  • Also, where do anonymous entities, that is, anonymous subroutines and datastructures, fit in here? Are these entities that are not bound to a name, but rather have only references? Or are such things bound still in the theoretical sense, with the difference between named and anonymous thingies meaningful only at the language level?

First version.. an anonymous thingy is an entity, and the reference is the value of that entity. An anonymous entity has no bindings until we create one for it.

In practical terms, we have raw symbols, things that live in the storage heap, entries in a symbol table, and strings that we use in our code. The things in the storage heap encapsulate raw symbols, and the entries in the symbol table give us programmatic access to things in the heap.

The raw symbol is a value. We probably associate it with some human assumption, but it doesn't exist in the computer until we encapsulate it with an entity.

The thing in the heap is an entity. It encapsulates a value, which puts the symbol into the computer.

The entry in the symbol table is a binding. It gives us the power to access an entity whenever and wherever we want (subject to the scope limits of the binding itself).

The string we use in our code is the identifier. It's one field of the symbol table entry, and it's the thing we actually see when we look at a piece of code and think, "variable."

In reply to Re4: MOPT-03 - identification, part 1 by mstone
in thread MOPT-03 - identification, part 1 by mstone

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?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others cooling their heels in the Monastery: (7)
    As of 2018-06-19 09:30 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (111 votes). Check out past polls.