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Re: Space/Time tradeoff

Cross-posted to 4 groups.

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vallor wrote:
> On Mon, 21 Jul 2025 02:19:14 -0500, "Lane \"Stonehowler\" Waldby"
> <wichitajayhawks@msn.com> wrote in <me67viFq4huU1@mid.individual.net>:
> 
>> vallor wrote:
>>> On Sun, 20 Jul 2025 20:21:17 -0500, "Lane \"Stonehowler\" Waldby"
>>> <wichitajayhawks@msn.com> wrote in <me5j0dFmse5U2@mid.individual.net>:
>>>
>>>> vallor wrote:
>>>>> On Tue, 20 Jun 2023 18:35:04 -0700 (PDT), entwickeln14 wrote:
>>>>>
>>>>>> On Saturday, June 17, 2023 at 8:07:31 PM UTC-4, nikolai kingsley
>>>>>> wrote:
>>>>>>> "a while ago" being around 1988.
>>>>>>
>>>>>> Hello.
>>>>>> What's new?
>>>>>>
>>>>>> e
>>>>>
>>>>> hi
>>>>>
>>>>> In 8th grade, I wrote a game on the Commodore PET.  You would
>>>>> maneuver your avatar (an asterisk) through a landscape of
>>>>> constantly-changing random blocks appearing and disappearing.
>>>>>
>>>>> Kind of a funky maze game.  Would have been around 1981.
>>>>>
>>>> Lies.  You never did that. You can't even count to 1981.
>>>
>>> Not only did I write it, I optimized the movement keys by using the
>>> numeric keypad numbers as indices for two arrays that held +/-1 values
>>> for x and y.
>>>
>>> Was a lot faster than the "if then" chain I was using previously.
>>>
>>> (This was in PET BASIC, of course.)
>>>
>>> Recently I asked ChatGPT about the principle I'd used, and it called it
>>> "time for space trade off".  Posted about it in comp.theory in passing.
>>>
>>> Message-ID: <101bvbm$58on$2@dont-email.me>
>>>
>>> It's pretty obvious that pre-computing values can speed things up.
>>> Orthogonally-related, I once made a lookup table for IPv4 unicast
>>> addresses whose decimal representation was an md5 hash.
>>>
>>> -rw-rw-r-- 1 xxx xxx  75161927360 May  6  2016 md5_ipv4_rainbow.b
>>>
>>> (Turns out, back in the days of Usenet yore, certain NSP's didn't salt
>>> their posting-host hashes.  Used it to figure out who was posting as
>>> certain socks in a.u.k.)
>>>
>> Yes and you noticed a fatal flaw on line 262 and decided that you would
>> do it again some day and didn't make a single penny off of it.
>>
>> One of the oldbies here wrote "Bilestoad," and I'm certain you've heard
>> of that.  If not, wikipedia.org will quickly bring you up to speed on
>> it.
> 
> Impressive.  Never ran across that one.
> 
> On the Apple ][, I played Karateka, Bolo, Taxman, and
> Choplifter to name a few.
> 

Yes I've played Karateka and Choplifter.

Have you ever rescued all 64 hostages?  IIRC my best was 60 hostages 
rescued.

-- 
Hasbro

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Thread

Video games are a waste of life "Pr. Mandrake" <niodoru@hotmail.com> - 2022-12-11 14:25 -0800
  Re: Video games are a waste of life Creon <creon@creon.earth> - 2022-12-13 06:02 +0000
    Re: Video games are a waste of life "Pr. Mandrake" <niodoru@hotmail.com> - 2023-01-16 13:30 -0800
      Re: Video games are a waste of life "Pr. Mandrake" <niodoru@hotmail.com> - 2023-03-09 03:48 -0800
    Re: Video games are a waste of life "Pr. Mandrake" <niodoru@hotmail.com> - 2023-01-29 18:08 -0800
    Re: Video games are a waste of life "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-20 20:13 -0500
  Re: Video games are a waste of life nikolai kingsley <sheramil@gmail.com> - 2023-06-16 19:31 -0700
    Re: Video games are a waste of life nikolai kingsley <sheramil@gmail.com> - 2023-06-17 17:07 -0700
      Re: Video games are a waste of life entwickeln14 <entwickeln14@gmail.com> - 2023-06-20 18:35 -0700
        Re: Video games are a waste of life vallor <vallor@cultnix.org> - 2023-06-22 21:08 +0000
          Re: Video games are a waste of life entwickeln14 <entwickeln14@gmail.com> - 2023-06-22 15:13 -0700
            Re: Video games are a waste of life vallor <vallor@cultnix.org> - 2023-06-22 22:48 +0000
              Re: Video games are a waste of life entwickeln14 <entwickeln14@gmail.com> - 2023-06-23 12:17 -0700
          Re: Video games are a waste of life nikolai kingsley <sheramil@gmail.com> - 2023-06-23 03:47 -0700
            Re: Video games are a waste of life vallor <vallor@cultnix.org> - 2023-06-24 07:47 +0000
              Re: Video games are a waste of life entwickeln14 <entwickeln14@gmail.com> - 2023-06-24 07:14 -0700
                Apple ][+ (was: Re: Video games are a waste of life vallor <vallor@cultnix.org> - 2023-07-01 10:33 +0000
          Re: Video games are a waste of life "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-20 20:21 -0500
            Space/Time tradeoff (was: Re: Video games are a waste of life) vallor <vallor@cultnix.org> - 2025-07-21 06:54 +0000
              Re: Space/Time tradeoff "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-21 02:19 -0500
                Re: Space/Time tradeoff vallor <vallor@cultnix.org> - 2025-07-21 07:44 +0000
                Re: Space/Time tradeoff "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-21 02:48 -0500
                Re: Space/Time tradeoff Doc Hammerslack <dochammerslack@creon.earth> - 2025-07-21 07:57 +0000
                Re: Space/Time tradeoff "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-21 03:05 -0500
                Re: Space/Time tradeoff vallor <vallor@cultnix.org> - 2025-07-21 08:25 +0000
                Re: Space/Time tradeoff "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-21 04:04 -0500
                Re: Space/Time tradeoff snipeco.2@gmail.com (Sn!pe) - 2025-07-21 12:12 +0100
                Re: Space/Time tradeoff "kaboota@kala.boo" <kaboota@kala.boo> - 2025-07-21 06:45 -0700
      Re: Video games are a waste of life "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-20 20:20 -0500
    Re: Video games are a waste of life "Lane \"Stonehowler\" Waldby" <wichitajayhawks@msn.com> - 2025-07-20 20:14 -0500

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