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• Non-mathematical Project Euler (or similar)?

  - by Juha Untinen

  I checked the post (Where can I find programming puzzles and challenges?) where there's a lot of programming challenges and such, but after checking several of them, they all seem to be about algorithms and mathematics. Is there a similar site for purely logic/functionality-based challenges? For example: - Retrieve data using a web service - Generate output X from a CSV file - Protect this code against SQL injection - Make this code more secure - What is wrong with this code (where the error is in logic, not syntax) - Make this loop more efficient Does a challenge site like that exist? Especially one that provides hints and/or correct solutions. That would be a very helpful learning site.

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• Studying Quantum Computing?

  - by The_Neo

  Hi I am a computer science student currently on an internship and I have been thinking more and more about looking into working for a company / places that is developing quantum computers/ing when I graduate. Here is my problem, I have a pretty solid grasp of mathematics involved in Comp Sci and enjoy learning about more Comp Sci theory but in doing some minor research about Quantum Computing it seems to me to be more about hardware and I have always leant more to the software side of things. I haven't studied any physics since high school so I am wondering if I would be suitable to work in such a field with a Comp Sci degree, is it a field more aimed at physicists?

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• Can i make a good career with VC++ programming ?

  - by Falconapollo

  I'm addicted to VC++ since 2008, and I begin to work for my current company from 2011 when I graduated in Mathematics. Now I still love VC++, it is a wonderful programming language. Now I'm a little confused whether it's a good idea to continue with Windows Programming. Now I'm in Beijing, China. Of course, I come from China. I want to find a work in Silicon Valley, America in the future. Can anyone tell me is it possible for me to find a VC++ work in Silicon Valley someday in the future? And what should I do in the recent years? Any help would be greatly appreciated!

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• 2D Game Development dynamics in c++ [on hold]

  - by novice

  I am new to developing computer graphic applications in c++ using OpenGl. I want to develop games but I really am facing problems when it comes to understanding concepts like trajectory, collisions, gravity and also the use of various physics engines that are available. when i search the internet I kind of get lost because they aren't for beginners like me. There is some hardcore mathematics, physics and coding involved. I need to pick the concepts that are mostly needed in game dev like trajectory, collision etc. Any good tutorials that can help me out in picking these concepts from the start.

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• Should Equality be commutative within a Class Hierachy?

  - by vossad01

  It is easy to define the Equals operation in ways that are not commutative. When providing equality against other types, there are obviously situations (in most languages) were equality not being commutative is unavoidable. However, within one's own inheritance hierarchy where the root base class defines an equality member, a programmer has more control. Thus you can create situations where (A = B) ? (B = A), where A and B both derive from base class T Substituting the = with the appropriate variation for a given language. (.Equals(_), ==, etc.) That seems wrong to me, however, I recognize I may be biased by background in Mathematics. I have not been in programming long enough to know what is standard/accepted/preferred practice when programming. Do most programmers just accept .Equals(_)may not be commutative and code defensibly. Do they expect commutativity and get annoyed if it is not. In short, when working in a class hierarchy, should effort me made to ensure Equality is commutative?

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• When must arbitrary precision arithmetic functions be used in PHP?

  - by Tjorriemorrie

  My colleague uses the Binary Calculator functions in bandwidth calculations; as much as terrabytes, and with percentage splitting on allocation. His usage of these functions appears correct in order not to lose a byte; although he seems to be using them now for everything. The manual only says: For arbitrary precision mathematics PHP offers the Binary Calculator which supports numbers of any size and precision, represented as strings. How much is any size? Is it really necessary? How big is the default float in PHP? Are there any good advice regarding this or things to keep in mind?

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• Start programming at 26? [closed]

  - by user663250

  Possible Duplicate: Is it too late to start programming? Hi, i am 26 and have a mathematics degree (specialized in logic and set theory). I feel i need a change and wanted to start programming, i have some experience (low-midd) with python and lisp, right now i am starting with c++ (stroustrup book)... My problem is that i am not sure where is a good place to start getting real experience (jobs, projects, etc... to keep motivation up), how much do i need to know to start looking for this and what other things i need to know to be a better programmer... My areas of interest are AI and gaming. But right now i just want to learn all i need or more...

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• Tetris Piece Rotation Algorithm

  - by coppercoder

  What are the best algorithms (and explanations) for representing and rotating the pieces of a tetris game? I always find the piece rotation and representation schemes confusing. Most tetris games seem to use a naive "remake the array of blocks" at each rotation: http://www.codeplex.com/Project/ProjectDirectory.aspx?ProjectSearchText=tetris However, some use pre-built encoded numbers and bit shifting to represent each piece: http://www.codeplex.com/wintris Is there a method to do this using mathematics (not sure that would work on a cell based board)?

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• Where can you find fun/educational programming challenges?

  - by tj9991

  I've searched around for different challenge sites, and most of them seem to be geared towards difficulty in problem solving logically, rather than trying to use your language of choice to do something you haven't used it for. Their center is around mathematics rather than function design. Some kind of point system for correctly solving challenges, or solving them the most efficient/smallest would be neat as well. Listed sites Project Euler TopCoder UVa Online Judge Challenges with Python Google Code Jam Programming Challenges Less Than Dot ACM's Programing Contest archive USACO problems ITA Software's puzzle page Refactor My Code Ruby Quiz

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• Good introductory statistics book?

  - by lmsasu

  Hello, what is a good introductory statistics book you can recommend? if there is a whole sequence of books that should be read, please do not hesitate to mention it. Books with applications are also welcome. I am aware that a single search on Amazon (or any other book seller) will provide me tons of titles, but some of them are avoidable... About my background/knowledge: good knowledge of mathematics and probability theory, but almost null on statistics.

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• Where do you go to tickle your brain (to get programming challenges)?

  - by Prakash

  I am sure we all have some place to go to get our brain teased! Sometimes i visit Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve. Although mathematics will help you arrive at elegant and efficient methods, the use of a computer and programming skills will be required to solve most problems Where do you all go?

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• who do you admire in a scientific/technical field [closed]

  - by Tshepang

  This off-topic item refers to people with major achievements in fields such as engineering, science, and mathematics. Here's my picks: Eric Drexler for his work on molecular nanotech. His book, Engines of Creations, is mind-blowing. Robert Freitas for his work on molecular nanotech. The breadth of his multi-volume book, Nanomedicine, is impressive. Richard Stallman for promoting Free Software.

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• question about books

  - by davit-datuashvili

  i have question how good is this book? http://www.amazon.com/Concrete-Mathematics-Foundation-Computer-Science/dp/0201558025/ ? and can anybody advise good books about bit manipulations? for example how good is this book? http://www.amazon.com/Hackers-Delight-Henry-S-Warren/dp/0201914654/

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• assign operator to variable in python?

  - by abhilashm86

  Usual method of applying mathematics to variables is a * b Is it able to calculate and manipulate two operands like this? a = input('enter a value') b = input('enter a value') op = raw_input('enter a operand') then how do i connect op and two variables a and b?? i know i can compare op to +, -, %, $ and then assign and compute.... but can i do something like a op b , how to tell compiler that op is an operator?? any tweaks possible?

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• Mathematical attack on the Digital Signature Algorithm

  - by drelihan

  Does anybody know the mathematics behind an attack on DSA where modulus p has p-1 made up of only small factors. In reality, this would not happen as the key generator would guarantee that this is not so. There is much information on the web on generating good input paramters for DSA so that it is hard to crack but no information on how you find X if modulus p has p-1 made up of only small factors.

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• Display formatted text in a window using python

  - by nikolaos

  I make a program in wxpython which displays questions to the user and a radiobox with answers. Questions and answers should be in a database and is formatted text using some mathematics (paranthesis, root squares etc). Could you propose me what widget I should use for such a text and what could be the database? Thanks.

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• Literature and Tutorials for Writing a Ray Tracer

  - by grrussel

  I am interested in finding recommendations on books on writing a raytracer, simple and clear implementations of ray tracing that can be seen on the web, and online resources on introductory raytracing. Ideally, the approach would be incremental and tutorial in style, and explain both the programming techniques and underyling mathematics, starting from the basics.

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• Has anyone "learned how to program in 21 days?"

  - by Sheehan Alam

  I'm not a fan of these learn how to program in X amount of days books. Some even boast, learn how to program in 24 hours. This is a joke and an insult to me as a software engineer who went through a rigorous discipline in computer science and mathematics. So a question to the community, have you benefited from these become a programmer quick books?

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• Good computer science lecture series

  - by joemoe

  Since we have a thread on books.. what are your recommendations of publicly accessible video lecture series related to programming, computer science, or mathematics? Please post specific courses, not websites with courses. :) This is the video equivalent of this thread: http://stackoverflow.com/questions/194812/list-of-freely-available-programming-books

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• current transform being applied by canvas

  - by Allain Lalonde

  How can I determine the current transform that's being applied by an html5 canvas. It seems that it only supports two methods for dealing with transforms "transform", "setTransform" but I can't seem to discover the results of applying the transforms. Short of tracking them all myself and duplicating the the matrix mathematics that it must be doing natively, how can I figure out the current transform?

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• Dynamically Rendering in a Scrollable Area

  - by James

  What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area? For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas. I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view. If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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• Dynamicall Rendering in a Scrollable Area

  - by James

  What is the generic algorithm or process that is commonly used to dynamically render portions of a scrolling area? For example, in Google Maps, when the user scrolls past the bounds of the currently rendered area, a grey checkerboard pattern is displayed within the not-yet-rendered portions while the application loads and renders those areas. I'm looking specifically for the approach, or the mathematics, related to filling a graphics area in chunks based on what has just come into view. If possible, I'm looking for anything relevant to the GDI+ process of doing so.

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• Problem solving/ Algorithm Skill is a knack or can be developed with practice?

  - by KaluSingh Gabbar

  Every time I start a hard problem and if can not figure out the exact solution or can not get started, I get into this never ending discussion with myself, as below: That problem solving/mathematics/algorithms skills are gifted (not that you can learn by practicing, by practice, you only master the kind of problems that you already have solved before) only those who went to good schools can do it, as they learned it early. What are your thoughts, can one achieve awesomeness in problem solving/algorithms just by hard work or you need to have that extra-gene in you?

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• LaTeX vs DocBook

  - by yfel

  I have only little knowledge about LaTeX, basic formatting, basic math fomulae etc.. I found that LaTeX is hard to configure to my own flavor. Recently, I've heard about Docbook, which is also a typesetting mechanism, but much easier since it uses XML. So, if my main job using LaTeX/Docbook is writing a simple document (not a class book) with some mathematics, and I want easy configuration, and a highly constomizable application, which one is better, and is there any good book on Docbook?

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• programming books [closed]

  - by davit-datuashvili

  I have only one dream -- to buy these two books: Introduction to Algorithms, Third Edition Concrete Mathematics: A Foundation for Computer Science Sorry for my dream, this is a site for posting programming questions, but unfortunately everything happened

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