Hamurabi (#223)

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

The three rules of Ruby Q.:

  1. Please do not post any solutions or spoiler discussion for this
    quiz until 48 hours have elapsed from the time this message was
    sent.

  2. Support Ruby Q. by submitting ideas and responses
    as often as you can.

  3. Enjoy!

Suggestion: A [QUIZ] in the subject of emails about the problem
helps everyone on Ruby T. follow the discussion. Please reply to
the original quiz message, if you can.


RSS Feed: http://rubyquiz.strd6.com/quizzes.rss

Suggestions?: http://rubyquiz.strd6.com/suggestions

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

Hamurabi (#223)

Boo Rubyists,

This week’s quiz was submitted by Martin DeMello1

Back in the microcomputer age, there was a fascinating little game
called Hamurabi (no, that isn’t a typo - there was an eight character
limit). The game mechanics were pretty simple: you were the ruler of a
kingdom, and every year you had to decide what proportion of your
grain to allocate to planting, and what proportion to feeding the
people. The game engine would then set up the formulae, toss in a few
random numbers and simulate your crop and population growth. For all
its simplicity, though, it was a lot of fun to play, and oddly
compulsive.

The Wikipedia page2 links to a couple of implementations in BASIC;
pick one and reimplement it in Ruby.

Extra credit: if someone can come up with a fun multiplayer version,
I’ll be impressed :slight_smile:

Have fun!

On Oct 31, 2009, at 6:23 PM, Daniel M. wrote:

The Wikipedia page[2] links to a couple of implementations in BASIC;
pick one and reimplement it in Ruby.

Thanks for a very enjoyable quiz!

I wrote a super minimal BASIC interpreter to avoid translating the
code. (Yes, I am aware that’s insane. I’ll seek help.)

Ironically, I think supporting that victory FOR loop at the very end
was the hardest part. I still have bugs in that. :frowning:

James Edward G. II

On 2009-11-01, James Edward G. II [email protected] wrote:

On Oct 31, 2009, at 6:23 PM, Daniel M. wrote:

Back in the microcomputer age, there was a fascinating little game
called Hamurabi (no, that isn’t a typo - there was an eight character
limit). The game mechanics were pretty simple: you were the ruler of a
kingdom, and every year you had to decide what proportion of your
grain to allocate to planting, and what proportion to feeding the
people. The game engine would then set up the formulae, toss in a few
random numbers and simulate your crop and population growth. For all
its simplicity, though, it was a lot of fun to play, and oddly
compulsive.

Oh, man! I remember that. There was one for the econ students at St.
Olaf loooong ago, I actually wrote my own from scratch once. In mine,
there were also woolen mills (or, in an early version, wollen mills –
I speld ril gud as a kid), and the win condition was to have a given
amount of
land, plus enough bolts of fabric to make wedding dresses for your
population,
and enough people that you could have hundreds of happy families. (The
question of whether wool was a good choice for a wedding dress was never
answered).

I wrote a super minimal BASIC interpreter to avoid translating the
code. (Yes, I am aware that’s insane. I’ll seek help.)

It’s a good kind of crazy.

-s

On Mon, Nov 2, 2009 at 5:29 AM, James Edward G. II
[email protected] wrote:

I wrote a super minimal BASIC interpreter to avoid translating the code.
(Yes, I am aware that’s insane. I’ll seek help.)

Wow, I thought translating the code would be fairly simple, but it’s a
morass of gotos and one-letter variables. I think I’d have written the
interpreter a lot quicker :slight_smile: But now my stubborn side has kicked in
and I’m going to finish the translation instead.

martin

I wrote a super minimal BASIC interpreter to avoid translating the
code. (Yes, I am aware that’s insane. I’ll seek help.)

Hah, ingenious!

I really didn’t want to go about translating that BASIC either, but
instead, I was just going to make my own version based on whatever I
just read about the game. Making a simple BASIC interpreter is so much
cooler though, it should be a ruby quiz in and of itself really (make it
a DSL for extra credit :P).

BTW, does anybody have any ideas for how a (fun) multiplayer version of
Hamurabi would look like? What I was thinking: Add in a model of free
markets to set price of land, so there would then be real trading
between players. Then a smart player could influence prices through
supply, to his opponents’ detriment, if he could see the state of their
kingdoms. And then there could be all sorts of nice strategies and
counter-strategies in the struggle to be the best. Also: quick (say 30
seconds or a minute at most), timed rounds, ending at round ten or so,
at which point the winner is announced, and the game is restarted.

What do you guys think of that? Sound like any fun? A problem might be
finding other players to actually play with live! In which case a
slower, non-timed version that emailed you when it was your turn might
be more appropriate (and less of a time sucker).

  • Ehsan

On Mon, Nov 2, 2009 at 10:25 AM, Ehsanul H. [email protected]
wrote:

BTW, does anybody have any ideas for how a (fun) multiplayer version of Hamurabi would look like? What I was thinking: Add in a model of free markets to set price of land, so there would then be real trading between players. Then a smart player could influence prices through supply, to his opponents’ detriment, if he could see the state of their kingdoms. And then there could be all sorts of nice strategies and counter-strategies in the struggle to be the best. Also: quick (say 30 seconds or a minute at most), timed rounds, ending at round ten or so, at which point the winner is announced, and the game is restarted.

What do you guys think of that? Sound like any fun? A problem might be finding other players to actually play with live! In which case a slower, non-timed version that emailed you when it was your turn might be more appropriate (and less of a time sucker).

You could also have disaffected people moving from city to city,
adjusting the populations upward and downward respectively.

martin

Great ideas.

I suggest a new disaster that could happen to a kingdom as well.

Public Healthcare

2009/11/3 Martin DeMello [email protected]

On Nov 2, 2009, at 2:19 PM, Martin DeMello wrote:

and I’m going to finish the translation instead.
Yeah, I’m am looking forward to seeing your translated version so I
can tell if my interpreter is even doing the right things. :slight_smile:

James Edward G. II

okay, that was long and painful, but i have emerged triumphant … i
hope :slight_smile:

http://pastie.org/681968 and attached

martin

On Oct 31, 2009, at 6:23 PM, Daniel M. wrote:

Back in the microcomputer age, there was a fascinating little game
called Hamurabi (no, that isn’t a typo - there was an eight character
limit).

Here’s my sort-of solution (via Pastie because it’s longish):

http://pastie.textmate.org/680908

I started cleaning it up a bit today, but ran out of time. There’s
still a lot more that could be done.

It also has a pretty big bug in it. My simple stack solution for
GOTO, GOSUB, and FOR doesn’t really work. It looked like it worked
most of the way through the code because, GOTO’s and GOSUB’s only
appear on their own lines or at the end of a compound instruction.
The FOR loop at the end isn’t like that though, and my interpreter
doesn’t really run it 10 times because it cannot resume into the
middle of a compound instruction line. Drat, foiled again.

I did have a ton of fun playing with this problem. Thanks again to
the organizers for a great problem!

James Edward G. II

“8k MICROSOFT BASIC”, apparently :slight_smile: It’s the one here:
http://www.dunnington.u-net.com/public/basicgames/HMRABI

martin

Wow this looks old, almost like GWBasic.

I would suggest flow charting this thing first, then creating it in Ruby
from your chart rather than trying to translate it line for line.

2009/11/2 Martin DeMello [email protected]

BASIC wasn’t that bad…

it was horrible :slight_smile:

Just out of curiosity, which BASIC interpreter was the BASIC script
you’re
trying to port written for?

2009/11/2 Martin DeMello [email protected]

Sorry I’m new to the list. Is it ok to post solutions at this point
(Nov 1 10:30am to now +48hrs)?

And then there could be all sorts of nice strategies and
You could also have disaffected people moving from city to city,
2009/11/3 Martin DeMello [email protected]
Existing disaster is when there is no public responsibility for
healthcare.
When the world is full of pharisees who pass by on the other side.

Human concern for others is something with a value beyond rubies!!

David

On Nov 2, 2009, at 6:37 PM, genericpenguin wrote:

Sorry I’m new to the list. Is it ok to post solutions at this point
(Nov 1 10:30am to now +48hrs)?

It sure is. Post away.

And welcome to the list.

James Edward G. II

ha ha ha, hard to argue against that point. Too bad our laws aren’t
written
in Ruby.

2009/11/3 David S. [email protected]

Well, here goes. I did it the bad way (no flowcharts or anything) and
it was pretty painful (meaning I regretted it later). I got it to the
point where it is semi-reasonable but it’s not very um, Rubyish. I
ironed out all the showstopper bugs but I’m sure there’s quite a few
more. In any case it works after a fashion (compared the output to a
running instance of http://www.calormen.com/applesoft/) and it doesn’t
make my eyes bleed (no guarantees on yours).

http://dl.getdropbox.com/u/1826667/hamurabi.rb

I spent so much time on it that in the end I didn’t clean up all the
puts’. Sorry!

On Nov 3, 11:50 am, James Edward G. II [email protected]

On Wed, Nov 4, 2009 at 4:23 AM, David S. [email protected]
wrote:

Existing disaster is when there is no public responsibility for healthcare.
When the world is full of pharisees who pass by on the other side.

Human concern for others is something with a value beyond rubies!!

Yeah, not having public healthcare could garner you a few extra
bushels of wheat per year, but increase your chances of plague and
decrease your immigration rates. There’s a nice continuum between
HAMURABI and Civilisations :slight_smile:

m.

Hi, I did the hard-way too, but no so sure I regret :slight_smile:

In fact it was interesting how to transform jumps into methods.

So here is my pastie:
http://pastie.textmate.org/681199

Still bugged, because I couldn’t understand so much the part with
planting
seeds. (and why using the variable dead at that moment?)

For the “for” loop at the end, what is it supposed to do? output
7.chr(bell)
?

2009/11/3 genericpenguin [email protected]

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs