Beefy Boxes and Bandwidth Generously Provided by pair Networks
more useful options

Comment on

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

If you're getting interested in functional programming, you should really read John Backus' 1978 Turing Award paper, "Can programming be liberated from the Von Neumann style?", which was really seminal to the whole field. (I don't believe it's available to the general public on the web -- I couldn't find it -- but look for the August 1978 issue of Communications of the ACM.)

In spite of its age, the points it makes are still fresh and interesting. One of the main ideas, which you point out but don't really emphasize above, is that it's not procedural: your program doesn't say, "Copy these bits over there, then if that was zero, copy these others over here." It says something more like, "The result I want can be described like this." The main tool for describing the like this part are functions (in the mathematical and logical sense) and functional composition. (Hence the name. ;-)

In my experience, functional programming doesn't have a steep learning curve, but it does involve an "Aha!" experience. One day, it just starts making sense. Sorry, but I don't have a good way of getting you to that point, other than what you're doing. Like geometry, there is no royal road to non-procedural programming.

In reply to Re: When would you use functional programming? by VSarkiss
in thread When would you use functional programming? by Ovid

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 the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others meditating upon the Monastery: (5)
    As of 2015-11-28 09:39 GMT
    Find Nodes?
      Voting Booth?

      What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

      Results (740 votes), past polls