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  • Do first-class methods exist?

    - by gdhoward
    Okay, I know first-class functions are cool, closures even better, etc. But is there any language with first-class methods? In my mind, I see a first-class method as an "object" that has both a function pointer and a pointer to a specific instance of the class/object, but the implementation doesn't matter. I just want to know if there is any language that uses them. And as a bonus, how were they implemented?

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  • Game programming : C# or C++?

    - by Chronix
    Ok so the faq says : "What language should I learn next? (Unless you have a specific requirement and don't know which language meets that requirement.)" so I guess this is not against the rules of questions. So, I've decided what I really want is to do Game Programming. So the question is, as a 18 years old who wants to learn self taught programming, what is the most suited programming language between C# and C++? ( I should state that I don't care about unix because I believe windows will be still the most used os ) I know the basics of C++, but none about C#. I know that C++ has more tutorials guides, dlls and stuff like that, while C# doesn't, but it's far easier to learn and to use for a single person to develop a program, but I've read even if the program is obfuscated it's easy to get the source of it. Well, I kinda want to focus on basic a lot first, I must say that I have a preference for C++ just because it feels more suitable to me, but I must consider that I work alone.. So even if I like it, it may not be the best thing to do. I am really not sure of which one to go for, i've read a lot of threads on various websites and it looks like C# is becoming more popular than C++. But yeah, that said, I also specified I want to do Game Programming. So I need to know some better points than just "C# is easier because of .net memory handling while C++ isnt" because I couldn't just find it. I hope the thread won't be closed because I've read the faq and I have a specific requirement. Thank you, and if you need more details you're free to ask me, but I think just by saying game programming and that I'd work alone should be enough!

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  • What type of application is this called?

    - by boatingcow
    I am working on a web-based application which combines elements of what my client would call a CMS (content management system) and CRM (customer relations management) but also adds in many other business-specific features such as bookings management, staff task allocation management, wages calculations, document version control etc. However, I'm struggling to find a catch-all term for this type of application so I can research how other people have gone about creating such an integrated solution. Can anyone recommend a term I can use to refer to this, both internally in our team, for the client so they know what to call the 'system' and also for me personally, so that I can ask the Stack community further questions?

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  • Could a singleton type replace static methods and classes?

    - by MKO
    In C# Static methods has long served a purpose allowing us to call them without instantiating classes. Only in later year have we became more aware of the problems of using static methods and classes. They can’t use interfaces They can’t use inheritance They are hard to test because you can’t make mocks and stubs Is there a better way ? Obviously we need to be able to access library methods without instantiated classes all the time otherwise our code would become pretty cluttered One possibly solution is to use a new keyword for an old concept: the singleton. Singleton’s are global instances of a class, since they are instances we can use them as we would normal classes. In order to make their use nice and practical we'd need some syntactic sugar however Say that the Math class would be of type singleton instead of an actual class. The actual class containing all the default methods for the Math singleton is DefaultMath, which implements the interface IMath. The singleton would be declared as singleton Math : IMath { public Math { this = new DefaultMath(); } } If we wanted to substitute our own class for all math operations we could make a new class MyMath that inherits DefaultMath, or we could just inherit from the interface IMath and create a whole new Class. To make our class the active Math class, you'd do a simple assignment Math = new MyMath(); and voilá! the next time we call Math.Floor it will call your method. Note that for a normal singleton we'd have to write something like Math.Instance.Floor but the compiler eliminates the need for the Instance property Another idea would be to be able to define a singletons as Lazy so they get instantiated only when they're first called, like lazy singleton Math : IMath What do you think, would it have been a better solution that static methods and classes? Is there any problems with this approach?

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  • Learning to program in the modern era?

    - by BBHorus
    At this time, lets say in the modern era, in which order do you organize a programing course for teaching and/or learning, what should be learned first, what should emphasize: Databases Data structures Design patterns Programing paradigms(Procedural, functional, OOP, ...etc ) Operating System Some specific programing language What about English if you are not native speaker or doesn't know English AI Anything else... I ask this because in the university that I went, the programing course was awful it was not focus on what you were going to see out when you work what you were supposed to learn. PS: Again sorry about my English is not my main language. ...Experts and gurus please share

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  • Isn't Java a quite good choice for desktop applications?

    - by tactoth
    At present most applications are still developed with C++, painfully. Lack of portability, in compatible libraries, memory leaks, slow compilation, and poor productivity. Even if you pick only a single from these shortages, it's still a big headache. However the surprising truth is that C++ remains the first choice for desktop applications. Compared to C++ Java has lots of advantages. The success in server side development shows that the language itself is good, Swing is also thought to be as programmer friendly as the highly recognized QT framework (No, never say even a single word about MFC!). All the disadvantages of C++ listed above has a solution in Java. "Performance!", Well that might still be the problem but to my experience it's a slight problem. I'd been using Java to decode some screen video and generate key frames. The video has a duration of more than 1 hour. The time spent on an average machine is just 1 minute. With C++ I don't expect even faster speed. In recent days there are many news on the JIT performance improvements, that make us feel Java is gradually becoming very suitable for desktop development, without people realizing it. Isn't it?

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  • Top X tips to code & debug efficiently [closed]

    - by user1510230
    I'm starting a big Java project and I wanted to have some advices that could benefit us all. What are the X (X could be 5 / 10 / ... or even 100 :) most important tips to code and debug efficiently in general (and in particular with java / javascript) ? I'll start with some basic ones : Use functions everytime a portion of code is used more than twice. Try not to code features with more than 15 lines of code in one shot. Rather write 5 lines of code then check if they work correctly then write 5 more... and so on start with the outcome of the function and then code it backwards (bottom-top approach) ... Thanks everybody

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  • Is it a good practice to code in English? [closed]

    - by Milox
    Possible Duplicate: Do people in non-English-speaking countries code in English? I have a development comming that is intended to be sold across Latin America (Spanish speakers), but I've heard from some partners that is a good practice to always code in English, I mean just code (methods, classes, pages names, etc), labels on GUI are going to be all in Spanish... Code will be edited in the future by developer of companies across Latin America and just maybe some from outside. What do you think?, any experience with this?

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  • Kind of lost, and I don't know where to start

    - by Rasheed Mehrinfar
    I am 16-year-old who's always been interested in the world of programming. I was wondering if anyone could point me in the right direction in what language I should learn first, and possibly suggest any good tutorials/ guides to learn from. Also, do you think it's worth it to kinda of "play around" and get familiar with a program like 3ds max, as my goal is to work in the gaming industry. Or would that just be a waste of time?

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  • Do functional generics exist and what is the correct name for them if they do?

    - by voroninp
    Consider the following generic class: public class EntityChangeInfo<EntityType,TEntityKey> { ChangeTypeEnum ChangeType {get;} TEntityKeyType EntityKey {get;} } Here EntityType unambiguously defines TEntityKeyType. So it would be nice to have some kind of types' map: public class EntityChangeInfo<EntityType,TEntityKey> with map < [ EntityType : Person -> TEntityKeyType : int] [ EntityType : Car -> TEntityKeyType : CarIdType ]> { ChangeTypeEnum ChangeType {get;} TEntityKeyType EntityKey {get;} } Another one example is: public class Foo<TIn> with map < [TIn : Person -> TOut1 : string, TOut2 : int, ..., TOutN : double ] [TIn : Car -> TOut1 : int, TOut2 :int, ..., TOutN : Price ] > { TOut1 Prop1 {get;set;} TOut2 Prop2 {get;set;} ... TOutN PropN {get;set;} } The reasonable question: how can this be interpreted by the compiler? Well, for me it is just the shortcut for two structurally similar classes: public sealed class Foo<Person> { string Prop1 {get;set;} int Prop2 {get;set;} ... double PropN {get;set;} } public sealed class Foo<Car> { int Prop1 {get;set;} int Prop2 {get;set;} ... Price PropN {get;set;} } But besides this we could imaging some update of the Foo<>: public class Foo<TIn> with map < [TIn : Person -> TOut1 : string, TOut2 : int, ..., TOutN : double ] [TIn : Car -> TOut1 : int, TOut2 :int, ..., TOutN : Price ] > { TOut1 Prop1 {get;set;} TOut2 Prop2 {get;set;} ... TOutN PropN {get;set;} public override string ToString() { return string.Format("prop1={0}, prop2={1},...propN={N-1}, Prop1, Prop2,...,PropN); } } This all can seem quite superficial but the idea came when I was designing the messages for our system. The very first class. Many messages with the same structure should be discriminated by the EntityType. So the question is whether such construct exists in any programming language?

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  • batch: comparing filenames and renaming [migrated]

    - by user2978770
    i'm new to both this platform and batch programming and i'm slowly but steadily driving crazy :-( I'm studying in Germany and just started on a bigger project that mainly consists of analyzing data and finding algorithms in order to maintain a certain function of a system. In order to get started i got a bunch of recorded data that, unfortunately, is not consistent when i comes to naming. Normally all files (all in one folder) should start with SPY.SPYNODE.SIDE and then go on with the specific names for each values or variables. However, the data logger messed it up a couple of times and gives weird names like SP0E1A~1.csv (all files are .csv-files). An that's when i figured in stead of renaming a couple of thousand files manually i could "easily" use a simple batch file to do that job for name. And that's exactly when I started to go crazy :-) So far i came up with the following: FOR /R %%i in (%CD%) DO ( set file1=%%i if not %file1%=="SPY.SPYNODE.SIDE" DO ( set /p "filename" < %file1% rename %file1% %filename% ) ) So what i want it to do is this (in pseudo) look through the whole folder and every file save the filename in variable file1 if file1 partially equals SPY.SPYNODE.SIDE open the file and save the first line (which contains the correct name of the file) in variable filename rename the file with the correct filename But so far it doesn't really work and i don't know why. Could anybody give me a hint or some advice how i should proceed? I really appreciate any kind of help!

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  • Useful Custom Business Programs

    - by jacktrades
    Can you name the most useful programs for small business you've seen? This comprises small programs (not big open source projects). I'm referring to tools that have done something different and extremely useful that a normal office suite could not. As a developer, I'm looking to propose more products to small businesses clients. In other words, What 'we developers' can do better than standard tools?

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  • What is the most concise, unambiguous syntax for operator associated methods (for overloading etc.) that doesn't pollute the namespace?

    - by Doug Treadwell
    Python tends to add double underscores before its built-in or overloadable operator methods, like __add(), whereas C++ requires declaring overloaded operators as operator + (Thing& thing) { /* code */ } for example. Personally I like the operator syntax because it seems to be more explicit and keeps these operator overloading methods separated from other methods without introducing weird prefix notation. What are your thoughts? Also, what about the case of built-in methods that are needed for the programming language to work properly? Is name mangling (like adding __ prefix or sys or something) the best solution here? What do you think about having another type of method declaration, like ... "system method" for lack of creativity at the moment. So there would be two kinds of declarations: int method_name() { ... } system int method_name() { ... } ... and the call would need to be different to distinguish between them. obj.method_name(); vs obj:method_name(); perhaps, assuming a language where : can be unambiguously used in this situation. obj.method_name() vs obj.(system method_name)() Sure, the latter is ugly, but the idea is to make the common case simple and system stuff should be kept out of the way. Maybe the Objective-C notation of method calls? [obj method_name]? Are there more alternatives? Please make suggestions.

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  • How to write a real time data acquisition program [closed]

    - by Tosin Awe
    I have to write a program in assembly language that will monitor temperature continuously, and I have no idea where to begin. The temperature must be displayed in BCD format, and the high and low set points will be programmed into the system. if the set points are exceeded then an alarm will be indicated. The low point is 20 degrees Celsius, and the high point is 24 degrees Celsius. Can somebody give me some hints on how to complete this task?

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  • Long lines of text in source code [closed]

    - by ale
    Possible Duplicate: Is the 80 character limit still relevant in times of widescreen monitors? I used to set a vertical line set at 80 characters in my text editor and then I added carriage returns if the lines got too long. I later increased the value to 135 characters. I started using word wrap and not giving myself a limit but tried to keep lines short if I could because it took a lot of time shortening my lines. People at work use word wrap and don't give themselves a limit.. is this the correct way? What are you meant to do ? Many thanks.

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  • Do functional generics exist or what is the correct name for them if they do?

    - by voroninp
    Consider the following generic class public class EntityChangeInfo<EntityType,TEntityKey> { ChangeTypeEnum ChangeType {get;} TEntityKeyType EntityKey {get;} } Here EntityType unambiguously defines TEntityKeyType. So it would be nice to have some kind of types' map public class EntityChangeInfo<EntityType,TEntityKey> with map < [ EntityType : Person -> TEntityKeyType : int] [ EntityType : Car -> TEntityKeyType : CarIdType ]> { ChangeTypeEnum ChangeType {get;} TEntityKeyType EntityKey {get;} } Another one example is: public class Foo<TIn> with map < [TIn : Person -> TOut1 : string, TOut2 : int, ..., TOutN : double ] [TIn : Car -> TOut1 : int, TOut2 :int, ..., TOutN : Price ] > { TOut1 Prop1 {get;set;} TOut2 Prop2 {get;set;} ... TOutN PropN {get;set;} } The reasonable question how this can be interpreted by the compiler? Well, for me it is just the sortcut for two structurally similar classes: public sealed class Foo<Person> { string Prop1 {get;set;} int Prop2 {get;set;} ... double PropN {get;set;} } public sealed class Foo<Car> { int Prop1 {get;set;} int Prop2 {get;set;} ... Price PropN {get;set;} } But besides this we could imaging some update of the Foo<: public class Foo<TIn> with map < [TIn : Person -> TOut1 : string, TOut2 : int, ..., TOutN : double ] [TIn : Car -> TOut1 : int, TOut2 :int, ..., TOutN : Price ] > { TOut1 Prop1 {get;set;} TOut2 Prop2 {get;set;} ... TOutN PropN {get;set;} public override string ToString() { return string.Format("prop1={0}, prop2={1},...propN={N-1}, Prop1, Prop2,...,PropN); } } This all can seem quite superficial but the idea came when I was designing the messages for our system. The very first class. Many messages with the same structrue should be discriminated by the EntityType. So the question is whether such construct exist in any programming language?

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  • Working for a company vs starting my own? [closed]

    - by Mark
    I need some advice, I am considering going to grad school for CS. I have a few big projects I came up with on my own that I am extremely motivated to work on and complete and try to turn it into a career. I am currently completing an internship working for a big company, decent pay, 9-5 hours in an office. I feel like working for the same company many people would enjoy and like, is extremely boring in my opinion and procedural at times and kills my motivation. As a result, I am kind of unsure if I should continue to get my CS M.S. degree and start working for a big company? What I would enjoy doing most is working for myself and developing my own project, but I am not sure if I will be able to finanically support myself doing that and I do not want to miss out on a big opportuinities/ job offers to work for a company. With that being said, I will never know if my project will ever succeed if I don't give it %110 of my time and dedication, so if I decide to go that route and work on my own project, I will have to set everything else aside, If anyone could give me any advice on what they think about my situation?

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  • How compilers know about other classes and their properties?

    - by OnResolve
    I'm writing my first programming language that is object orientated and so far so good with create a single 'class'. But, let's say I want to have to classes, say ClassA and ClassB. Provided these two have nothing to do with each other then all is good. However, say ClassA creates a ClassB--this poses 2 related questions: -How would the compiler know when compiling ClassA that ClassB even exists, and, if it does, how does it know it's properties? My thoughts thus far had been: instead of compiling each class at a time (i.e scan, parse and generate code) each "file (not really file, per se, but a "class") do I need to scan + parse each first, then generate code for all?

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  • practical use of knowledge vs tutorials [on hold]

    - by Lauris Skraucis
    I DONT NEED FACTS,I NEED OPINIONS FROM OTHER DEVELOPERS! Which would be more useful, spend more time on tutorials than on practical use of knowledge or spend more time making real life apps? Like I do everything 50/50 or better I spend all time practicing and putting my knowledge in real life things (php, jQuery, AngularJS)? This is a big pain, I learnt jQuery, then Angular, then php, but didn't practice and forget the code, now I watched basic and intermediate tutorials to refresh knowledge, so what do you think what is the best?

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  • Will Java or C# be a better career choice for the future? [closed]

    - by learner_17
    I am in a tough situation here,and i know this question has been asked a thousand times.I have been asked by an employer to switch to java ,although i am currently working on c# for the last 3-4 months. my dilemna is should i go for it? is java tough?and if i go whats the best way to learn java. And if I dont switch how do i sharpen my c# skills - or should is say my whole grip over the entire .net framework.

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  • Which Provides a better Foundation Java or .Net (C#, ASP.NET)?

    - by Deadlocked_Thread
    I am not asking this question to start arguments (people often consider Java and .Net as religions) but which provides a better foundation and helps to gain real programming skills (of Computer Science and Web Development), I have worked with ASP.NET and C# but most of my time spends on Dragging and Dropping i am a C++ programmer and Drag and Drop irritates me.I haven't tried Java so i want to ask is Java also like .Net family (Drag and Drop)?

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  • Laser range finder, what language to use? Beginner advice

    - by DrOnline
    I hope this is the right place. I am a programming beginner, and I want to make a laser range finder, and I need advice about how to proceed etc. In a few weeks I will get a lot of dirt cheap 3-5V lasers and some cheap usb webcams. I will point the laser and webcam in parallel, and somehow use trigonometry and programming to determined distance. I have seen online that others made done it this way, I have purposefully not looked at the details too much because I want to develop it on my own, and learn, but I know the general outline. I have a general idea of how to proceed. The program loads in a picture from the webcam, and I dunno how images work really, but I imagine there is a format that is basically an array of RGB values.. is this right? I will load in the red values, and find the most red one. I know the height difference between the laser and the cam. I know the center dot in the image, I know the redmost dot. I'm sure there's some way to figure out some range there. TO THE POINT: 1) Is my reasoning sound thus far, especially in terms of image analysis? I don't need complete solutions, just general points 2) What I need to figure out, is what platform to use. I have an arduino... apparently, I've read it's too weak to process images. Read that online. I know some C I know some Python I have Matlab. Which is the best option? I do not need high sampling rates, I have not decided on whether it should be automated or whether I should make a GUI with a button to press for samples. I will keep it simple and expand I think. I also do not need it to be super accurate, I'm just having fun here. Advice!

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  • Programming Carreer. What should i choose? [closed]

    - by thenewbie
    I have an experience in programming. Im not that experience but i have created some desktop application like payroll etc. In web i had created some websites. Now im studying java for android. I already created an application on android and submitted it on google play.However, i feel like the excitement in creating application for android or web is gone. What i think i like is to program in c++ language. but i have a doubt mastering it. Because nowadays only a handful of company hire a c++ junior programmer. I think only in gaming industry that they would hire a c++ programmer and has an 3 or more years of xp. While in java there are lots of oppurtuniy especialy for android. and I dont have a plan studying objective c cause i dont have mac. SO what should i realy choose? thank you..

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  • Someone who needs inspiration [on hold]

    - by Anestis
    My apologies if it is not a code problem. However, it is a problem that concerns programming. As a recently graduated Computer Systems Engineering I have gained some basic knowledge with programming using JAVA. I have realised 2 things, the first one is that I realy liked programming and the second is that I am not good at all. More specifically, I struggle on problem solving and when i face complex tasks I feel lost. Every day , I spend some quality time doing simple exercises in order to be more familiar with JAVA. My target is to become a good programmer and find a job on a software company. I am afraid maybe " I dont have it" thats why I am asking you , what should I do? Should i give up? Thanks in advance, Anestis

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  • How to export user input data from python (Tkinter) to excel? [migrated]

    - by mrn
    I am trying to develop a user form in python 2.7.3. Please note that I am a python beginner. I am trying to use xlwt to export data to excel. I want to write values of following variables i.e. a (value to write:'x1') & d (value to write: be user defined information in text box), to an excel sheet, a=StringVar() checkBox1=Checkbutton(root, text="text1", variable=a, onvalue="x1", offvalue="N/A") checkBox1.place(relx=0., rely=0., relwidth=0., relheight=0.) checkBox1.pack() d=StringVar() atextBox1=Entry(root, textvariable=d, font = '{MS Sans Serif} 10') atextBox1.pack()

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