Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw
 
PerlMonks  

Comment on

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

This task gets absurdly easy in UCBLogo (a Logo dialect that is, in effect, an M-expression dialect of Lisp complete with macros). It is, in fact, so easy as to be almost meaningless in the context of UCBLogo. You don't have to create the procedure (aka function/subroutine) at all because it already exists in the form of the language primitive procedure reverse.

The reason it works that way is pretty simple: in UCBLogo, the way one represents a "string" made up of a number of words is as a bracketed list, what in UCBLogo parlance is the list, or sentence, data type. The reverse procedure operates on lists, same as the Perl function of the same name, but the fact that the list data type in UCBLogo is in effect its string data type eliminates a middleman.

Thus, no procedure definition is needed, and using it looks like this:

reverse [  one   two three four    ]

The output looks like this:

[four three two one]

There are some definite advantages to treating all data as lists (the other type of lists in UCBLogo being known as words).

print substr("Just another Perl hacker", 0, -2);
- apotheon
CopyWrite Chad Perrin


In reply to Re: Five Ways to Reverse a String of Words (C#, Perl 5, Perl 6, Ruby, Haskell) by apotheon
in thread Five Ways to Reverse a String of Words (C#, Perl 5, Perl 6, Ruby, Haskell) by eyepopslikeamosquito

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 having an uproarious good time at the Monastery: (9)
    As of 2014-08-20 21:14 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The best computer themed movie is:











      Results (124 votes), past polls