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I have recently decompiled a Java program I had written quite a while ago, and I noticed where I had Math.pi it replaced it with 3.1415... etc, I also have gotten this weird number and I cannot figure out what it is, if it was a number I put in myself or the result of something the compiler did like with Pi. What is this number?
The number is 0.7853981633974483
Edit:
Thank you, those who helped me I am sorry, I was not able to figure out this simple thing, I now know what it is and I will consider that in the future, I now know that when you decompile Java, it puts 3.1415... in place of the math.pi, and if it is math.pi * 2 it would do that math and put 6.283.. in place of it. I did not know that before.
0.785398... is pi / 4. Without knowing more about the code we can't know if that makes sense to you or not...
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Im pretty new to Android but I have worked with Java before.
I dont understand why my algorithm doesn't work. The result I get is 0.0%.
txtInfo.setText(Double.toString((RadioProgress/255)*100)+"%");
txtInfo is a TextView.
I can see in my graphic that my RadioProgress gets the right value. But still I get 0.0% all the time.
Please help me understand :)
Thanks in advance!
If RadioProgress is of integer type and less than 255 then division will always return 0. Cast it to double and you will see values.
Another way would be to divide by 255.0 to enforce conversion
txtInfo.setText(Double.toString((RadioProgress/255.0)*100)+"%");
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I want to start with a simple 2d game in xna as shown in the picture like character jumping, catching the points. Any help is appreciated. thank u.
You may want to try the Platformer Starter Kit from Microsoft. It contains a basic level system that can handle a few tiles, with basic collision. It supports enemies and "gems" by default.
It has quite a few problems, but that is part of the learning process, it is only designed to get you started in XNA.
You can view the documentation and enhancements here.
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I have applied to couple of startups and most of them are asking to solve programming challenge before they start on the interviewing candidate.
I have submitted couple of the solution and all the time getting rejected in the initial screening.
Now what i think is, they will see my coding style, algorithm and OOD concepts that i have used to solve the problem. Can you guys input more on it as what other details are taken into consideration and how can i improve my coding for getting selected.
By the way, i did all my coding in either Java/Perl.
Nice question, I am a new grad too... One thing I notice: When you do the exercise home, they expect you to use the best algorithm out there. In my opinion code modularity, even on a small function is key. Put lot effort into the code because they are not just judging you, but comparing you against other candidate. The one which seems to have put the more effort wins.
ps: Ask this question on programmers.stackexchange, you will obtain some good inputs there.
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I'm having Memcache problems and I was wondering what is the best way to know how big the objects I create are.
The only solution I have is to put them into Memcache which display their size in bytes (by the way, can I customize Memcache's output? I want readable kilobytes…).
Thank you,
Kevin
The excellent Eigenclass blog had an interesting article on that once:
http://web.archive.org/web/20120126022146/http://eigenclass.org/R2/writings/object-size-ruby-ocaml
There also was a good discussion on ruby-talk, which led to some code by Robert Klemme (Ruby Best Practices):
http://www.ruby-forum.com/topic/156648
http://www.pastie.org/217131
Plugging the values from the first article into the script might get you started and is probably quite educational.
You could also check out memprof, though it's more about object references and finding memory leaks than actual sizes:
http://github.com/ice799/memprof
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I am writing a server for playing the great diplomacy game online. Does anyone know an algorithm for the judge, that will calculate all moves/supports/convoys on the map at the end at each round?
For implementing the protocol I use twisted, for db-access django
Yes. DPjudge Adjudication Algorithm. Also see the DPJudge FAQ answer to the question about convoy paradoxes.
A check the njudge page that links to source code.
You might also want to look into the DAIDE project. They have a full comm protocol for create dip bot players against special servers. It's not open source (unfortunately) but there is a small community who use it to play real-time Dip games when 7 humans aren't available to play.