Re: My thoughts on C# and gaming.

Richard wrote:
> In article <[email protected]>,
>     Bill Kelly <[email protected]>  writes:
>>
>> However, it's unlikely I would have used that library in this case,
>> [...]
> 
> I only see this snippet out of context and compared with a ruby
> equivalent in the comments.  What I got out of the discussion was a
> lamentation that you couldn't be as concise in C++.  If I wrote the
> ruby code in the equivalent low-level algorithms as the C++ code, I'm
> guessing it wouldn't be a one-liner anymore either.
> 
> So the comparison seems a bit off to me.  Its like comparing a big
> number crunching set of formulas from Mathematica to the equivalent
> naked C++ with no library support.  The reason something like
> Mathematica or ruby is more concise within a particular problem domain
> is that the framework is there to support that problem domain.  If you
> remove that problem domain support and compare apples to apples in
> terms of algorithms, then C++ starts to look more reasonable by
> comparison.

I agree about the pastebin code.  In my enthusiasm last night,
I had overlooked the fact that I had indeed deprived myself of
higher level C++ libraries that I might otherwise ordinarily
have used to make the parsing job simpler.

Unfortunately this gaffe has rather distracted from my claims
that I feel more productive in Ruby for certain tasks than C++.


I don't know if this example will help, but at least it's game-
related.

Here we're starting an interactive Ruby prompt, opening a UDP
socket, and querying a Quake II server for its public status.

 $ irb --simple-prompt
 >> require 'socket'
 => true
 >> sock = UDPSocket.open
 => #<UDPSocket:fd 4>
 >> sock.send("\xFF\xFF\xFF\xFFstatus\0", 0, "tastyspleen.net", 27912)
 => 11
 >> result = sock.recvfrom(65536)
 => ["\xFF\xFF\xFF\xFFprint\n...", ["AF_INET", 27912, "tastyspleen.net", "74.54.186.226"]]
 >> print result[0]
     print
 \Q2Admin\1.17.44-tsmod-2\mapname\ranbase2\anticheat\1\sv_noobquad\0
 \gamedate\Aug  2 2009\gamename\baseq2\maxspectators\8\sv_handicap\1
 \INFO2\NO BOTS, HACKS, CHEATS PLEASE\INFO1\All Skill Levels Welcome
 \cheats\0\timelimit\15\fraglimit\30\dmflags\16404\deathmatch\1\
 version\R1Q2 b7864 i386 Oct  1 2008 Linux
 \hostname\tastyspleen.net::vanilla\maxclients\32
 2 56 "Quahog "
 0 7 "WallFly[BZZZ]"
 13 43 "the.swine.cru"
 12 88 "Pittybull"
 20 59 "Festus"
 18 177 "[XZ]MAYARA"
 9 29 "mojoe"
 1 19 "crusty-cru"
 16 32 "Daemos"
 11 220 "Alice"
 13 227 "Bradley"
 15 150 "[XZ]Zeppelin"
 => nil
 >> sock.close
 => nil

# to me the above is already pretty neat, but for fun i'll go
# ahead and parse the player info results into a data structure:
# (the [4..-1] below is trimming off the leading 0xFF bytes)

 >> lines = result.first[4..-1].split(/\n/)
 >> player_lines = lines[2..-1]
 >> PlayerStatus = Struct.new(:name, :score, :ping)
 >> players = player_lines.map {|info| info =~ /^(\d+) (\d+) "(.*)"$/ && PlayerStatus.new($3, $1.to_i, $2.to_i)}

# done.  we now have the player data parsed into an array of
# instances of our new PlayerStatus class.  The player data is
# currently unsorted, or, rather, retains the ordering from the
# status response, which is probably implicitly by client-ID on
# the server:

 >> players.first.name
 => "Quahog "
 >> players.first.score
 => 2
 >> players.first.ping
 => 56

# we can see that indeed Quahog was the first entry in
# the unparsed server response up above.
# now, let's sort the players by highest score...

 >> sorted_players = players.sort_by {|pl| -pl.score}

# done.

 >> sorted_players.first.name
 => "Festus"
 >> sorted_players.first.score
 => 20


I've just never had a programming experience in C++ that was
anywhere near as facile as that.


Regards,

Bill


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