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  • How to determine if a .NET Type is a custom struct?

    - by SztupY
    Hi! How to write a simple method, that checks whether a concrete type is a custom struct (created with public struct { };) or not. Checking Type.IsValueType is not enough, because it is also true to int, long, etc, and adding a check to !IsPrimitiveType won't exclude decimal, DateTime and maybe some other value types. I know that most of the built in value types are actually "structs", but I only want to check for "custom structs" These questions are mostly the same but without the answer I need: #1 #2 #3

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  • Extending the User model with custom fields in Django

    - by Gaurav
    I am trying to extend the User model so that I can add my own custom fields but I keep getting an error stating: 'NoneType' object has no attribute '_default_manager' whenever I try to use user.get_profile() to add values to the custom field i.e. whenever I use it like so: user = User.objects.create_user(username, email, password) user.first_name = fname user.last_name = lname user.save() uinfo = user.get_profile() uinfo.timezone = "Asia/Pune" uinfo.save() I have already followed the steps given at http://stackoverflow.com/questions/44109/extending-the-user-model-with-custom-fields-in-django/965883#965883 with no luck.

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  • What are great _specific_ usability guidelines?

    - by Jilles
    Usability is extremely important, and yet there are so many products that violate a lot of rules. There are several questions on StackOverflow that are about usability (see: link1, link2, link3), however what I feel is missing still is a comprehensive list of usability "tactics": concrete examples of what (not) to do for a web application. Please don't add references to books. Please list one example per answer so that we can use the voting to actually prioritize the list.

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  • Semantic urls with dots in .net

    - by Jokin
    I'm trying to make semantic urls for search pages, but if someone use a search finished in dot, the .net engine return a 404. The request don't even get to the routing engine, so i think its something related to security or something like that. For example, the stackoverflow routes also don't work in these case: http://stackoverflow.com/questions/tagged/etc.

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  • how to get path froma variable

    - by yoshco
    following http://stackoverflow.com/questions/659647/how-to-get-folder-path-from-file-path-with-cmd i want to strip the path (without the filename) from a variable. following the logic of the methods discussed above i would like to use batch bellow, which doesnt work. any takers? possible? set cpp="C:\temp\lib.dll" echo %cpp% "C:\temp\lib.dll" echo %~dpcpp "C:\temp\" > doesn't work

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  • Porting QT application from Linux to Windows?

    - by umanga
    Greetings all, We are developing a QT application (QT 4.6 LGPL version) in Linux platform.All the libraries we use are cross-platform. Now we want to port it into Windows and continue develop in Windows. My questions are: Which compiler should we use ,Can we use MinGW or Visual C++ compiler? 2.If its Visual C++ compiler, which Visual Studio version should be used ,can we use 'Visual C++ Studio 2010 express' ? thanks in advance.

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  • How can char* be a condition in for loop?

    - by Jackie
    In a book I am reading there is a piece of code : string x; size_t h=0; for(const char* s=x.ctr();*s;++s) h=(h*17)^*s; Regarding this code, I have two questions: how can *s be a condition? what does it mean? what does "h=(h*17)^*s" mean? Thanks for help!

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  • Can jpg images support animation?

    - by Ashish
    Well guys. we are not supposed to ask theoratical questions here .. but dint know any other forum where someone would answer this :) jpeg image How is the above jpg image can be animated? As far as I know jpg format does not support animation.

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  • What is the most easy way to get in advanced Type Theory.

    - by Bubba88
    Of course, by 'advanced' I mean here just something beyond what every programmer does know. I'm currently more-or-less comfortable with the basics and want to understand the most important, most elegant and most practically applicable achievements of modern type theory. I just do not have much time, desire and mental powers to study all the formalistics more thoroughly and that may change in the future. But there is something really attractive for me in that branch, that just forces to ask silly questions like this :) Thank you very much!

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  • Why is giving a fixed width to a label an accepted behavior?

    - by kemp
    There are a lot of questions about formatting forms so that labels align, and almost all the answers which suggest a pure CSS solution (as opposed to using a table) provide a fixed width to the label element. But isn't this mixing content and presentation? In order to choose the right width you basically have to see how big your longest label is and try a pixel width value until "it fits". This means that if you change your labels you also have to change your CSS.

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  • Is it possible to implement Separated Interface in PHP?

    - by sunwukung
    I recently asked a question regarding the resolution of dependencies between Unit of Work and Data Mapper classes: http://stackoverflow.com/questions/3012657/dependency-injection-and-unit-of-work-pattern - (which was answered by Gabor de Mooij - thx) In PoEAA, Martin Fowler suggests using Separated Interface to manage these dependencies. My question is simple - is it actually possible to implement this pattern in PHP, or is it specific to Java interfaces? I've searched high and low and it's hard to find references to this pattern anywhere outside of PoEAA.

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  • Does anyone know what happens if you do not implement iequtalable when using generic collections?

    - by ChloeRadshaw
    I asked a question here : http://stackoverflow.com/questions/2476793/when-to-use-iequatable-and-why about using Iequatable. From the msdn: The IEquatable(T) interface is used by generic collection objects such as Dictionary(TKey, TValue), List(T), and LinkedList(T) when testing for equality in such methods as Contains, IndexOf, LastIndexOf, and Remove. If you dont implement that interface what exactly happens?? Exception / default object equals / ref equals?

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  • vim adding new function names for project's API

    - by Flavius
    Hi How can I add new function names for .c and .h files to be highlighted, similar to this http://stackoverflow.com/questions/2464593/custumizing-syntax-highlighting-in-vim but much easier? (as I don't need to color words in different colors, only in the default color for keywords as defined by my theme). I need this to add highlighting for function names in a project written in C which has a clearly defined API. Thanks

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  • Extracting data from jpeg files

    - by Ronny
    Hi, I want to extract some kind of bmp/rgb data from jpeg files. I had a look at libjpeg, but there seemed not to be any good documentation available. So my questions are: Where is documentation on libjpeg? Can you suggest other c-based jpeg-decompression libraries? thanks in regard ps: I am using GNU/Linux, and c/c++

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  • increase a field value based on the radio button selection

    - by sts
    <% count = 1 % <% for question in @questions % <%=count%. <%= question.title if question.title% <% for response in @response % <% if response.question_id.eql?(question.id) % <%=radio_button(count, :voting, :count_modification) % <%= response.nomination % <% end % <% end % <% count += 1 % <% end % This is my whole code to implment the survey in views. if i give the count as third argument in radio button i cant select answer for each question. i can select only one answer for the whole survey.

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  • jQuery resize not working at FireFox, Chrome and Safari

    - by naveen
    $("#dvMyDIV").bind("resize", function(){ alert("Resized"); }); or $("#dvMyDIV").resize(function(){ alert("Resized"); }); The questions Why is this not working at FireFox, Chrome and Safari? Can this be considered a jQuery bug since the resize is not handled for other browsers? Could the only workaround be calling a SetTimeout function checking the clientHeight and clientWidth? Any workarounds using jQuery?

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  • Looking for an Open Source Project in need of help

    - by hvidgaard
    Hi StackOverflow! I'm a CS student on well on my way to graduate. I have had a difficult time of finding relevant student jobs (they seems to be taken merely hours after the notice gets on the board) , so instead I'm looking for an open source project in need of help. I'm aware that I should choose one that I use, but I'm not aware of any OS-project that I use that needs help. That's why I'm asking you. I don't have any deep experience, but I here are some of my biggest projects so far: BitTorrent-ish client in Python (a subset of BitTorrent) HTTP 1.1 webserver in Java Compiler from a subset of Java to run on JRE Flash-framework project to model an iPad look and feel (not to run actual iPad programs) complete with an API for programs. Complete MySQL database for a booking system, with departure and arrival times, so you could only book valid tickets (with a Java frontend). I know, Java and languages like AS3 and C# feels natural per se, Python, and have done a fair bit of hacking around in C, but I don't feel very comfortable with it. Mostly I'm afraid to make a fuckup because I have such a high degree of control. I would like to think I'm well aware of good software design practices, but in reality what I do is ask myself "would I like to use/maintain this?", and I love to refactor my code because I see optimizations. I love algorithms and to make them run in the best possible time. I don't have any preferred domain to work in, but I wouldn't mind it to be graphics or math heavy. Ideally I'm looking for a project in C++ to learn the in's and out's of it, but I'm well aware that I don't know that language very well. I would like to have a mentor-like figure until I'm confident enough to stand on my own, not one to review all my code (I'm sure someone will to start with anyway), but to ask questions about the project and language in question. I do have a wife and two children, so don't expect me to put in 10+ hours every week. In return I can work on my own, I strive to program modular and maintainable code. Know how to read an API, use Google, StackOverflow and online resources in general. If you have any questions, shoot. I'm looking forward to your suggestions.

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