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Re: Google CodeJam?

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From vandys@vsta.org
Newsgroups comp.lang.forth
Subject Re: Google CodeJam?
Date 26 Apr 2012 16:45:34 GMT
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WJ <w_a_x_man@yahoo.com> wrote:
> I have barely looked at Python.  The significance of indentation
> doesn't appeal to me.  Also repellent is the fact that the language
> tries to allow you to do a thing only one way: Guido's way.

Having coded heavily in C, Forth, and Python, I can say that the indentation
approach has not turned out to be a big deal.  And although Guido is, in
fact, "Benevolent Dictator for Life", his guidance has evolved Python into a
very effective language.  I suggest you move beyond "barely looking" before
reaching a conclusion on the language.

One of my most recent "aha" moments was this code for doing breadth traversal
of collections:

def breadthfirst(tree, children=iter):
    yield tree
    last = tree
    for node in breadthfirst(tree, children):
	for child in children(node):
	    yield child
	    last = child
	if last == node:
	    return

It's used as:

    for member in breadthfirst(aCollection):
	...

And "member" gets first the things at the top, then things one level down,
and so forth.  It works generically across any collection.

Although the language does not have, as such, lazy evaluation semantics, this
function uses generators to get that effect.  I'm not sure I've seen a more
elegant breadth-first traversal in any language, and I don't know that
there's any other language which could use this implementation technique.

I really hope that, some day, a next generation Forth will marry its elegance
to semantics as powerful as these.

-- 
Andy Valencia
Home page: http://www.vsta.org/andy/
To contact me: http://www.vsta.org/contact/andy.html

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Thread

Google CodeJam? Ian Osgood <iano@quirkster.com> - 2012-04-11 16:23 -0700
  Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-12 00:43 -0700
    Re: Google CodeJam? hughaguilar96@yahoo.com - 2012-04-21 15:13 -0700
      Re: Google CodeJam? Bernd Paysan <bernd.paysan@gmx.de> - 2012-04-22 02:19 +0200
      Re: Google CodeJam? "WJ" <w_a_x_man@yahoo.com> - 2012-04-22 04:03 +0000
        Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-22 23:08 -0700
        Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-22 23:17 -0700
          Re: Google CodeJam? "WJ" <w_a_x_man@yahoo.com> - 2012-04-23 19:27 +0000
            Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-23 22:08 -0700
              Re: Google CodeJam? "WJ" <w_a_x_man@yahoo.com> - 2012-04-24 08:30 +0000
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-24 23:00 -0700
                Re: Google CodeJam? "WJ" <w_a_x_man@yahoo.com> - 2012-04-26 09:19 +0000
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-26 03:17 -0700
                Re: Google CodeJam? vandys@vsta.org - 2012-04-26 16:45 +0000
                Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-26 10:47 -0700
                Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-27 02:26 -0700
                Re: Google CodeJam? vandys@vsta.org - 2012-04-27 16:37 +0000
                Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-27 10:17 -0700
                Re: Google CodeJam? vandys@vsta.org - 2012-04-27 18:15 +0000
            Re: Google CodeJam? Rugxulo <rugxulo@gmail.com> - 2012-04-26 16:00 -0700
      Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-22 12:12 +0200
        Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-22 14:11 +0200
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-22 14:17 +0200
            Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 14:25 +0200
        Re: Google CodeJam? mhx@iae.nl (Marcel Hendrix) - 2012-04-22 18:23 +0200
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-22 22:24 +0200
            Re: Google CodeJam? mhx@iae.nl (Marcel Hendrix) - 2012-04-23 20:59 +0200
              Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-23 13:56 -0700
        Re: Google CodeJam? mhx@iae.nl (Marcel Hendrix) - 2012-04-22 18:29 +0200
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-22 21:36 +0200
        Re: Google CodeJam? Bernd Paysan <bernd.paysan@gmx.de> - 2012-04-22 23:08 +0200
          Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-22 23:06 -0700
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-23 23:19 +0200
            Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-23 22:35 -0700
              Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 01:59 +0200
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-24 22:16 -0700
                Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 14:25 +0200
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-25 11:58 -0700
                Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-26 00:23 +0200
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-25 11:58 -0700
                Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-26 00:23 +0200
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-25 11:58 -0700
                Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-26 00:23 +0200
                Re: Google CodeJam? Albert van der Horst <albert@spenarnc.xs4all.nl> - 2012-04-26 12:36 +0000
                Re: Google CodeJam? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-04-25 13:39 +0000
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-04-25 10:05 -0700
                Re: Google CodeJam? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2012-04-26 16:30 +0000
                Re: Google CodeJam? Bernd Paysan <bernd.paysan@gmx.de> - 2012-04-27 15:21 +0200
            Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-24 00:51 -0700
              Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 01:59 +0200
        Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 01:59 +0200
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-27 14:15 +0200
            Re: Google CodeJam? hughaguilar96@yahoo.com - 2012-04-30 23:54 -0700
              Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-02 01:44 +0200
                Re: Google CodeJam? Hugh Aguilar <hughaguilar96@yahoo.com> - 2012-05-01 20:45 -0700
                Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-02 23:38 +0200
      Re: Google CodeJam? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-04-24 12:50 +0100
        Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-04-24 08:22 -0700
        Re: Google CodeJam? mhx@iae.nl (Marcel Hendrix) - 2012-04-24 22:28 +0200
          Re: Google CodeJam? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-04-25 09:50 +0100
        Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-25 01:59 +0200
          Re: Google CodeJam? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2012-04-25 09:49 +0100
  Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-04-27 18:28 +0200
    Re: Google CodeJam? Bruno Gauthier <bgauthier@free.fr> - 2012-05-01 17:59 +0200
      Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-01 19:12 +0200
        Re: Google CodeJam? Bruno Gauthier <bgauthier@free.fr> - 2012-05-01 20:39 +0200
        Re: Google CodeJam? mhx@iae.nl - 2012-05-01 16:00 -0700
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-02 02:29 +0200
        Re: Google CodeJam? Paul Rubin <no.email@nospam.invalid> - 2012-05-01 19:18 -0700
          Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-02 05:14 +0200
      Re: Google CodeJam? awegel@arcor.de (Alex Wegel) - 2012-05-02 01:44 +0200

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