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Re: learnpython.org - an online interactive Python tutorial

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Date Sun, 24 Apr 2011 18:21:01 +1000
Subject Re: learnpython.org - an online interactive Python tutorial
From Chris Angelico <rosuav@gmail.com>
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Xref x330-a1.tempe.blueboxinc.net comp.lang.python:3944

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On Sun, Apr 24, 2011 at 6:13 PM, Steven D'Aprano
<steve+comp.lang.python@pearwood.info> wrote:
> suppose an implementation might choose to trade off memory for time,
> skipping string -> bignum conversations at the cost of doubling the
> memory requirements. But even if I grant you bignums, you have to do the
> same for floats. Re-implementing the entire floating point library is not
> a trivial task, especially if you want to support arbitrary precision
> floats.

Or just arbitrary precision decimal strings, which aren't "floats" at
all. But to be honest, I've never looked at any implementation of REXX
(and the open source implementations do seem to be inferior to IBM's
OS/2 implementation, I think - haven't done any empirical testing
though), so I can't say how it's done. But it seems to my small
understanding that it'd be simpler to just work with the base 10
string than to convert it to base 256 or base 2**32 or something, just
because you skip the conversions. Obviously this makes REXX a poor
choice for heavy HEAVY computation, but it's potentially faster for
things that involve a little computation and a lot of string
manipulation (which is where REXX does well).

Chris Angelico

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learnpython.org - an online interactive Python tutorial Ron <ron.reiter@gmail.com> - 2011-04-20 10:15 -0700
  Re: learnpython.org - an online interactive Python tutorial Matty Sarro <msarro@gmail.com> - 2011-04-20 13:57 -0400
  Re: learnpython.org - an online interactive Python tutorial Terry Reedy <tjreedy@udel.edu> - 2011-04-20 18:12 -0400
  Re: learnpython.org - an online interactive Python tutorial Chris Angelico <rosuav@gmail.com> - 2011-04-21 14:07 +1000
  Re: learnpython.org - an online interactive Python tutorial Algis Kabaila <akabaila@pcug.org.au> - 2011-04-21 17:10 +1000
    Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-21 02:29 -0500
  Re: learnpython.org - an online interactive Python tutorial Chris Angelico <rosuav@gmail.com> - 2011-04-21 17:19 +1000
  Re: learnpython.org - an online interactive Python tutorial Heiko Wundram <modelnine@modelnine.org> - 2011-04-21 09:30 +0200
    Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-22 01:38 -0500
      Re: learnpython.org - an online interactive Python tutorial Chris Angelico <rosuav@gmail.com> - 2011-04-22 17:08 +1000
        Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-23 19:37 -0500
          Re: learnpython.org - an online interactive Python tutorial Cameron Simpson <cs@zip.com.au> - 2011-04-24 12:23 +1000
            Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-23 21:39 -0500
              Re: Re: learnpython.org - an online interactive Python tutorial Dave Angel <davea@ieee.org> - 2011-04-24 07:16 -0400
                Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-25 01:14 -0500
      Re: learnpython.org - an online interactive Python tutorial Mel <mwilson@the-wire.com> - 2011-04-22 09:07 -0400
        Re: learnpython.org - an online interactive Python tutorial Roy Smith <roy@panix.com> - 2011-04-22 09:22 -0400
      Re: learnpython.org - an online interactive Python tutorial Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-04-22 23:28 -0700
        Re: learnpython.org - an online interactive Python tutorial flebber <flebber.crue@gmail.com> - 2011-04-23 05:49 -0700
          Re: learnpython.org - an online interactive Python tutorial Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2011-04-23 11:01 -0700
        Re: learnpython.org - an online interactive Python tutorial rantingrick <rantingrick@gmail.com> - 2011-04-23 08:16 -0700
      Re: learnpython.org - an online interactive Python tutorial rantingrick <rantingrick@gmail.com> - 2011-04-23 08:21 -0700
      Re: learnpython.org - an online interactive Python tutorial Dotan Cohen <dotancohen@gmail.com> - 2011-04-23 19:51 +0300
      Re: learnpython.org - an online interactive Python tutorial Tim Chase <python.list@tim.thechases.com> - 2011-04-23 12:25 -0500
      Re: learnpython.org - an online interactive Python tutorial Westley Martínez <anikom15@gmail.com> - 2011-04-23 12:38 -0700
      Re: learnpython.org - an online interactive Python tutorial Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-24 00:42 +0000
        Re: learnpython.org - an online interactive Python tutorial Chris Angelico <rosuav@gmail.com> - 2011-04-24 11:35 +1000
          Re: learnpython.org - an online interactive Python tutorial Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-24 08:13 +0000
            Re: learnpython.org - an online interactive Python tutorial Chris Angelico <rosuav@gmail.com> - 2011-04-24 18:21 +1000
        Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-23 22:10 -0500
          Re: learnpython.org - an online interactive Python tutorial Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2011-04-24 09:18 +0000
            Re: learnpython.org - an online interactive Python tutorial harrismh777 <harrismh777@charter.net> - 2011-04-25 01:20 -0500
              Re: learnpython.org - an online interactive Python tutorial Terry Reedy <tjreedy@udel.edu> - 2011-04-25 11:43 -0400
              Re: learnpython.org - an online interactive Python tutorial Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2011-04-26 13:06 +1200
          Re: learnpython.org - an online interactive Python tutorial jmfauth <wxjmfauth@gmail.com> - 2011-04-24 08:15 -0700
  Re: learnpython.org - an online interactive Python tutorial Westley Martínez <anikom15@gmail.com> - 2011-04-21 07:14 -0700
  Re: learnpython.org - an online interactive Python tutorial MRAB <python@mrabarnett.plus.com> - 2011-04-21 17:13 +0100
  Re: learnpython.org - an online interactive Python tutorial Dotan Cohen <dotancohen@gmail.com> - 2011-04-23 16:45 +0300

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