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• Who determines what is best practice? [closed]

  - by dreza

  I've often searched for answers relating to "best practice" when writing code. And I see many questions regarding what is best practice. However, I was thinking the other day. Who actually determines what this best practice is? Is it the owners or creators of the programming language. Is it the general developer community that is writing in the language and it's just a gut feeling consensus. Is it whoever seems to have the highest prestige in the developer world and shouts the loudest? Is best practice really just another term for personal opinion? I hope this is a constructive question. If I could word it better to ensure it doesn't get closed please feel free to edit, or inform me otherwise.

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• Is Java free/open source or it isn't?

  - by user1598390

  On November 13, 2006, Sun released much of Java as free and open source software, (FOSS), under the terms of the GNU General Public License (GPL). On May 8, 2007, Sun finished the process, making all of Java's core code available under free software/open-source distribution terms, aside from a small portion of code to which Sun did not hold the copyright. OpenJDK (Open Java Development Kit) is a free and open source implementation of the Java programming language. It is the result of an effort Sun Microsystems began in 2006. The implementation is licensed under the GNU General Public License (GNU GPL) with a linking exception. Why there are still people that say Java is not open source or free as in free speech ? Am I missing something? Is Java still privative ?

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• Do employers prefer software engineering over CS majors?

  - by Joey Green

  I'm in grad school at a university that was one of the first to have a software engineering accredited program. My undergrad is in CS. An employer recently recruited at our university and hired 5 SE majors. None of them were CS. Do employers prefer software engineering majors? The reason I ask is because I can focus on many different areas during my graduate studies and really want to take the classes that will help me land a great job. Right now I'm either going to use CUDA and parallelize an advanced ray-tracer for a graduate project or do research on non-photo-realistic rendering in augmented reality. Pursuing these would leave very little SE classes in my schedule. If I went the software engineering route, I would probably either do research into data-oriented programming or software design complexity. Sometimes I think when I'm 40 and look back will it matter at all? For some reason I'm thinking not.

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• How can I rank teams based off of head to head wins/losses

  - by TMP

  I'm trying to write an algorithm (specifically in Ruby) that will rank teams based on their record against each other. If a team A and team B have won the same amount of games against each other, then it goes down to point differentials. Here's an example: A beat B two times B beats C one time A beats D three times C bests D two times D beats C one time B beats A one time Which sort of reduces to A[B] = 2 B[C] = 1 A[D] = 3 C[D] = 2 D[C] = 1 B[A] = 1 Which sort of reduces to A[B] = 1 B[C] = 1 A[D] = 3 C[D] = 1 D[C] = -1 B[A] = -1 Which is about how far I've got I think the results of this specific algorithm would be: A, B, C, D But I'm stuck on how to transition from my nested hash-like structure to the results. My psuedo-code is as follows (I can post my ruby code too if someone wants): For each game(g): hash[g.winner][g.loser] += 1 That leaves hash as the first reduction above hash2 = clone of hash For each key(winner), value(losers hash) in hash: For each key(loser), value(losses against winner): hash2[loser][winner] -= losses Which leaves hash2 as the second reduction Feel free to as me question or edit this to be more clear, I'm not sure of how to put it in a very eloquent way. Thanks!

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• managing information/functionality on shared common project classes

  - by ilansch

  In my company, we have a common solution the contains common projects (2 projects so far, one for .net 3.5 and one for .net 4.5). My main problem is that during time, a lot of code is added, for example hosting a process as windows service is a class called ServiceManagement, But no one but the developer knows it, and if someone wants to use this shared class, he does not know it exist. So i am looking for a way to document and manage all the classes with tags, a 3rd party util/web util, that i can search for tags and maybe find common classes that i can use (if we keep all our code well-documented). Does anyone familiar with sort of tools ?

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• How do you keep from running into the same problems over and over?

  - by Stephen Furlani

  I keep running into the same problems. The problem is irrelevant, but the fact that I keep running into is completely frustrating. The problem only happens once every, 3-6 months or so as I stub out a new iteration of the project. I keep a journal every time, but I spend at least a day or two each iteration trying to get the issue resolved. How do you guys keep from making the same mistakes over and over? I've tried a journal but it apparently doesn't work for me. [Edit] A few more details about the issue: Each time I make a new project to hold the files, I import a particular library. The library is a C++ library which imports glew.h and glx.h GLX redefines BOOL and that's not kosher since BOOL is a keyword for ObjC. I had a fix the last time I went through this. I #ifndef the header in the library to exclude GLEW and GLX and everything worked hunky-dory. This time, however, I do the same thing, use the same #ifndef block but now it throws a bunch of errors. I go back to the old project, and it works. New project no-worky. It seems like it does this every time, and my solution to it is new each time for some reason. I know #defines and #includes are one of the trickiest areas of C++ (and cross-language with Objective-C), but I had this working and now it's not.

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• Backbone.js, Rails and code duplication

  - by Matteo Pagliazzi

  I'm building a web app and I need a JS framework like Backbone.js to work with my backend rovided by Rails that mostly return JSON objects after DB queries. Searching on the web I've discovered Backbone which seems to be complete, quite populare and actively developed but I've noticed that a lot of things done by Backbone are simply a duplicte of the works done by Rails: for example validation and models. My idea of "perfect" (for my actual needs) JS mvc (it can't be called mvc but i don't have any other names) is something really simple that has a function for each action in my Rails controller that are triggered by a specific event (user/hash changes, click on a button...) and send requests to the server that respond with a JSON object then I'll load a template or execute some JS code. Do you have any concern/suggestion about my idea? Do you know some "micro" js framework like what i have described? If you have worked with backone.js + rails what can you suggest me?

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• Getting rid of Massive View Controller in iOS?

  - by Earl Grey

  I had a discussion with my colleague about the following problem. We have an application where we need filtering functionality. On any main screen within the upper navigation bar, there is a button in the upper right corner. Once you touch that button, an custom written Alert View like view will pop up modally, behind it a semitransparent black overlay view. In that modal view, there is a table view of options, and you can choose one exclusively. Based on your selection, once this modal view is closed, the list of items in the main view is filtered. It is simply a modally presented filter to filter the main table view.This UI design is dictated by the design department, I cannot do anything about it so let accept this as a premise. Also the main filter button in the navbar will change colours to indicate that the filter is active. The question I have is about implementation. I suggested to my colleague that we create a separate XYZFilter class that will be an instance created by the main view controller acquire the filtering options handle saving and restoration of its state - i.e. last filter selected provide its two views - the overlay view and the modal view be the datasource for the table in its modal view. For some unknown reason, my colleague was not impressed by that approach at all. He simply wants to do these functionalities in the main view controller, maybe out of being used to do this in the past like that :-/ Is there any fundamental problem with my approach? I want to keep the view controller small, not to have spaghetti code create a reusable component (for use outside the project) have more object oriented, decoupled approach. prevent duplication of code as we need the filtering in two different places but it looks the same in both.. Any advice?

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• Controllers in CodeIgniter

  - by Dileep Dil

  I little bit new to the CodeIgniter framework and this is my first project with this framework. During a chat on StackOverflow somebody said that we need to make controllers tiny as possible. Currently I have a default controller named home with 1332 lines of codes (and increasing) and a model named Profunction with 1356 lines of codes (and increasing). The controller class have about 46 functions on it and also with model class. I thought that Codeigniter can handle large Controllers or Models well, is there any problem/performance issue/security issues regarding this?

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• Handling Indirection and keeping layers of method calls, objects, and even xml files straight

  - by Cervo

  How do you keep everything straight as you trace deeply into a piece of software through multiple method calls, object constructors, object factories, and even spring wiring. I find that 4 or 5 method calls are easy to keep in my head, but once you are going to 8 or 9 calls deep it gets hard to keep track of everything. Are there strategies for keeping everything straight? In particular, I might be looking for how to do task x, but then as I trace down (or up) I lose track of that goal, or I find multiple layers need changes, but then I lose track of which changes as I trace all the way down. Or I have tentative plans that I find out are not valid but then during the tracing I forget that the plan is invalid and try to consider the same plan all over again killing time.... Is there software that might be able to help out? grep and even eclipse can help me to do the actual tracing from a call to the definition but I'm more worried about keeping track of everything including the de-facto plan for what has to change (which might vary as you go down/up and realize the prior plan was poor). In the past I have dealt with a few big methods that you trace and pretty much can figure out what is going on within a few calls. But now there are dozens of really tiny methods, many just a single call to another method/constructor and it is hard to keep track of them all.

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• Customizing configuration with Dependency Injection

  - by mathieu

  I'm designing a small application infrastructure library, aiming to simplify development of ASP.NET MVC based applications. Main goal is to enforce convention over configuration. Hovewer, I still want to make some parts "configurable" by developpers. I'm leaning towards the following design: public interface IConfiguration { SomeType SomeValue; } // this one won't get registered in container protected class DefaultConfiguration : IConfiguration { public SomeType SomeValue { get { return SomeType.Default; } } } // declared inside 3rd party library, will get registered in container protected class CustomConfiguration : IConfiguration { public SomeType SomeValue { get { return SomeType.Custom; } } } And the "service" class : public class Service { private IConfiguration conf = new DefaultConfiguration(); // optional dependency, if found, will be set to CustomConfiguration by DI container public IConfiguration Conf { get { return conf; } set { conf = value; } } public void Configure() { DoSomethingWith( Conf ); } } There, the "configuration" part is clearly a dependency of the service class, but it this an "overuse" of DI ?

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• time it takes to develop 4*N lines of code. Nonlinear, but how nonlinear ?

  - by Andrei

  It took me time T to develop program A, 1000 lines of code (SLOC), in certain language/area/complexity. Then how much time it will take to develop program B which is expected 4000 lines, in same area/complexity/language ? I expect it to be 4*N, right ? Any formula how T grows with SLOC ? For contractor, these estimates are important. Is there formula from software enginering books, or from people's experience ? Also, what methods exist to make the code bug-free before it hits QA ?

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• How to handle lookup data in a C# ASP.Net MVC4 application?

  - by Jim

  I am writing an MVC4 application to track documents we have on file for our clients. I'm using code first, and have created models for my objects (Company, Document, etc...). I am now faced with the topic of document expiration. Business logic dictates certain documents will expire a set number of days past the document date. For example, Document A might expire in 180 days, Document 2 in 365 days, etc... I have a class for my documents as shown below (simplified for this example). What is the best way for me to create a lookup for expiration values? I want to specify documents of type DocumentA expire in 30 days, type DocumentB expire in 75 days, etc... I can think of a few ways to do this: Lookup table in the database I can query New property in my class (DaysValidFor) which has a custom getter that returns different values based on the DocumentType A method that takes in the document type and returns the number of days and I'm sure there are other ways I'm not even thinking of. My main concern is a) not violating any best practices and b) maintainability. Are there any pros/cons I need to be aware of for the above options, or is this a case of "just pick one and run with it"? One last thought, right now the number of days is a value that does not need to be stored anywhere on a per-document basis -- however, it is possible that business logic will change this (i.e., DocumentA's are 30 days expiration by default, but this DocumentA associated with Company XYZ will be 60 days because we like them). In that case, is a property in the Document class the best way to go, seeing as I need to add that field to the DB? namespace Models { // Types of documents to track public enum DocumentType { DocumentA, DocumentB, DocumentC // etc... } // Document model public class Document { public int DocumentID { get; set; } // Foreign key to companies public int CompanyID { get; set; } public DocumentType DocumentType { get; set; } // Helper to translate enum's value to an integer for DB storage [Column("DocumentType")] public int DocumentTypeInt { get { return (int)this.DocumentType; } set { this.DocumentType = (DocumentType)value; } } [DataType(DataType.Date)] [DisplayFormat(DataFormatString = "{0:MM-dd-yyyy}", ApplyFormatInEditMode = true)] public DateTime DocumentDate { get; set; } // Navigation properties public virtual Company Company { get; set; } } }

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• Thick models Vs. Business Logic, Where do you draw the distinction?

  - by TokenMacGuy

  Today I got into a heated debate with another developer at my organization about where and how to add methods to database mapped classes. We use sqlalchemy, and a major part of the existing code base in our database models is little more than a bag of mapped properties with a class name, a nearly mechanical translation from database tables to python objects. In the argument, my position was that that the primary value of using an ORM was that you can attach low level behaviors and algorithms to the mapped classes. Models are classes first, and secondarily persistent (they could be persistent using xml in a filesystem, you don't need to care). His view was that any behavior at all is "business logic", and necessarily belongs anywhere but in the persistent model, which are to be used for database persistence only. I certainly do think that there is a distinction between what is business logic, and should be separated, since it has some isolation from the lower level of how that gets implemented, and domain logic, which I believe is the abstraction provided by the model classes argued about in the previous paragraph, but I'm having a hard time putting my finger on what that is. I have a better sense of what might be the API (which, in our case, is HTTP "ReSTful"), in that users invoke the API with what they want to do, distinct from what they are allowed to do, and how it gets done. tl;dr: What kinds of things can or should go in a method in a mapped class when using an ORM, and what should be left out, to live in another layer of abstraction?

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• I'm a student learning C++ and I've recently found out about Ruby. Would learning (some of) Ruby help me with C++ or would it just confuse me?

  - by Von32

  Hi! As the title says, I'm a student that will be starting my second year of C++ very soon. I've discovered Ruby, however. While I've heard much buzz about the language before, I've disregarded it because I always thought it wasn't something that would be useful. However, I've found a number of FANTASTIC tutorials on ruby and am interested in learning it (probably because it seems so straightforward). Would playing around with ruby be a good or bad idea? I understand that there's not such thing as bad knowledge, but I'm afraid that Ruby will only confuse me when dealing with C++. How different from C++ is it? I've read it's based on C in some way, but my google-fu seems to be horrible today. How useful is Ruby in the real world? I'm not specifically asking about jobs- I'm more interested in what sort of applications may come from this language. Any specific examples worth looking at? Going back to Question two- I've read some posts on here that Ruby and C++ can hold hands once in a while. How flexible is this relationship? Is it rarely that this would work? Thank you Very much for your time! EDIT: This has to be the one community on the internet that doesn't suck. Why have I never posted before? You guys are awesome!

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• Good questions to ask a potential new boss?

  - by David Johnstone

  I first asked this question on Stack Overflow, but it turns out this is a better place for it. Imagine you were working as a software developer. Imagine that the manager of your team leaves and your company is looking for a replacement. Imagine that as part of the hiring process you had the opportunity to talk with him. You are not the only person doing an interview, and while it is not ultimately your decision whether or not to hire him, you do have an influence. What questions would you ask? What would you talk with him about?

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• C#/.net features to cut off assuming no backward compatibility needed?

  - by Gulshan

  Any product or framework evolves. Mainly it's done to catch up the needs of it's users, leverage new computing powers and simply make it better. Sometimes the primary design goal also changes with the product. C# or .net framework is no exception. As we see, the present day 4th version is very much different comparing with the first one. But thing comes as a barricade to this evolution- backward compatibility. In most of frameworks/products there are features would have been cut off if there was no need to support backward compatibility. According to you, what are these features in C#/.net? Please mention one feature per answer.

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• Should I implement slugs with my already fairly long URLs?

  - by Earlz

  I'm considering implementing slugs in my blog. My blog uses MongoDB. One of the side-effects of using MongoDB is that it uses relatively long hex string IDs. Example before: http://lastyearswishes.com/blog/view/5070f025d1f1a5760fdfafac after: http://lastyearswishes.com/blog/view/5070f025d1f1a5760fdfafac/improvements-on-barelymvc Of course, that's a relatively short title.. I have some longer ones, but intend to limit the maximum character limit for slugs to something reasonable. At what point does a URL become so long that it hurts SEO instead of improves it? In this case, should I leave my URLs alone, or add slugs?

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• How can I unit test a class which requires a web service call?

  - by Chris Cooper

  I'm trying to test a class which calls some Hadoop web services. The code is pretty much of the form: method() { ...use Jersey client to create WebResource... ...make request... ...do something with response... } e.g. there is a create directory method, a create folder method etc. Given that the code is dealing with an external web service that I don't have control over, how can I unit test this? I could try and mock the web service client/responses but that breaks the guideline I've seen a lot recently: "Don't mock objects you don't own". I could set up a dummy web service implementation - would that still constitute a "unit test" or would it then be an integration test? Is it just not possible to unit test at this low a level - how would a TDD practitioner go about this?

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• Implementation of instance testing in Java, C++, C#

  - by Jake

  For curiosity purposes as well as understanding what they entail in a program, I'm curious as to how instance testing (instanceof/is/using dynamic_cast in c++) works. I've tried to google it (particularly for java) but the only pages that come up are tutorials on how to use the operator. How do the implementations vary across those langauges? How do they treat classes with identical signatures? Also, it's been drilled into my head that using instance testing is a mark of bad design. Why exactly is this? When is that applicable, instanceof should still be used in methods like .equals() and such right? I was also thinking of this in the context of exception handling, again particularly in Java. When you have mutliple catch statements, how does that work? Is that instance testing or is it just resolved during compilation where each thrown exception would go to?

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• how to update child records when updating the Master table using Linq [closed]

  - by user20358

  I currently use a general repositry class that can update only a single table like so public abstract class MyRepository<T> : IRepository<T> where T : class { protected IObjectSet<T> _objectSet; protected ObjectContext _context; public MyRepository(ObjectContext Context) { _objectSet = Context.CreateObjectSet<T>(); _context = Context; } public IQueryable<T> GetAll() { return _objectSet.AsQueryable(); } public IQueryable<T> Find(Expression<Func<T, bool>> filter) { return _objectSet.Where(filter); } public void Add(T entity) { _objectSet.AddObject(entity); _context.ObjectStateManager.ChangeObjectState(entity, System.Data.EntityState.Added); _context.SaveChanges(); } public void Update(T entity) { _context.ObjectStateManager.ChangeObjectState(entity, System.Data.EntityState.Modified); _context.SaveChanges(); } public void Delete(T entity) { _objectSet.Attach(entity); _context.ObjectStateManager.ChangeObjectState(entity, System.Data.EntityState.Deleted); _objectSet.DeleteObject(entity); _context.SaveChanges(); } } For every table class generated by my EDMX designer I create another class like this public class CustomerRepo : MyRepository<Customer> { public CustomerRepo (ObjectContext context) : base(context) { } } for any updates that I need to make to a particular table I do this: Customer CustomerObj = new Customer(); CustomerObj.Prop1 = ... CustomerObj.Prop2 = ... CustomerObj.Prop3 = ... CustomerRepo.Update(CustomerObj); This works perfectly well when I am updating just to the specific table called Customer. Now if I need to also update each row of another table which is a child of Customer called Orders what changes do I need to make to the class MyRepository. Orders table will have multiple records for a Customer record and multiple fields too, say for example Field1, Field2, Field3. So my questions are: 1.) If I only need to update Field1 of the Orders table for some rows based on a condition and Field2 for some other rows based on a different condition then what changes I need to do? 2.) If there is no such condition and all child rows need to be updated with the same value for all rows then what changes do I need to do? Thanks for taking the time. Look forward to your inputs...

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• Continual Professional Development - proving new skills to non-technical employers

  - by Tom

  Background I work in a non-IT based company, as a professional software developer, building a large scale internal database system. I am fortunate to have a fairly senior position within the company, and have been working here for around 4 years. Often I get asked by management "how do you learn new things?". To be honest, I don't know how to answer this. Over the last 6 months, I've really gotten my teeth into some new techniques and technologies to make my level of coding far better and hopefully improve the quality of the software. Even if it's just refreshing my skills on things I've learnt already. Like last week I dived into some complex XLinq and TPL code (.net). Nothing revolutionary, but I feel like I am a bit better than before. Question The question is, how do I prove this to my employer? It'd be nice to be able to put this on paper. Possibilities I could: Keep a journal of what I've learnt - keeping the technical bits in (nobody would understand or care, but it's better than them being omitted) ???? (I've run out of ideas already) Any ideas? Thanks, Tom

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• When to delete a branch in Git

  - by Jo-Herman Haugholt

  I have a script project I've been managing with Git. Besides two main branches, several minor branches have been introduced over time to cover minor features, tweaks or temporary changes. Some of these branches are nearing end-of-life, and I won't be updating them any more. What's the different philosophies for handling branches like this? Should they be removed, or left in the repository unmaintained? If I do, won't I end up with a cluttered repository?

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• Who owns the IP rights of the software without written employment contract? Employer or employee? [closed]

  - by P T

  I am a software engineer who got an idea, and developed alone an integrated ERP software solution over the past 2 years. I got the idea and coded much of the software in my personal time, utilizing my own resources, but also as intern/employee at small wholesale retailer (company A). I had a verbal agreement with the company that I could keep the IP rights to the code and the company would have the "shop rights" to use "a copy" of the software without restrictions. Part of this agreement was that I was heavily underpaid to keep the rights. Recently things started to take a down turn in the company A as the company grew fairly large and new head management was formed, also new partners were brought in. The original owners distanced themselves from the business, and the new "greedy" group indicated that they want to claim the IP rights to my software, offering me a contract that would split the IP ownership into 50% co-ownership, completely disregarding the initial verbal agreements. As of now there was no single written job description and agreement/contract/policy that I signed with the company A, I signed only I-9 and W-4 forms. I now have an opportunity to leave the company A and form a new business with 2 partners (Company B), obviously using the software as the primary tool. There would be no direct conflict of interest as the company A sells wholesale goods. My core question is: "Who owns the code without contract? Me or the company A? (in FL, US)" Detailed questions: I am familiar with the "shop rights", I don't have any problem leaving a copy of the code in the company for them to use/enhance to run their wholesale business. What worries me, Can the company A make any legal claims to the software/code/IP and potential derived profits/interests after I leave and form a company B? Can applying for a copyright of the code at http://www.copyright.gov in my name prevent any legal disputes in the future? Can I use it as evidence for legal defense? Could adding a note specifying the company A as exclusive license holder clarify the arrangements? If I leave and the company A sues me, what evidence would they use against me? On what basis would the sue since their business is in completely different industry than software (wholesale goods). Every single source file was created/stored on my personal computer with proper documentation including a copyright notice with my credentials (name/email/addres/phone). It's also worth noting that I develop significant part of the software prior to my involvement with the company A as student. If I am forced to sign a contract and the company A doesn't honor the verbal agreement, making claims towards the ownership, what can I do settle the matter legally? I like to avoid legal process altogether as my budget for court battles is extremely limited at the moment. Would altering the code beyond recognition and using it for the company B prevent the company A make any copyright claims? My common sense tells me that what I developed is by default mine in terms of IP, unless there is a signed legal agreement stating otherwise. But looking online it may be completely backwards, this really worries me. I understand that this is not legal advice, and I know to get the ultimate answer I need to hire a lawyer. I am only hoping to get some valuable input/experience/advice/opinion from those who were in similar situation or are familiar with the topic. Thank you, PT

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• Android Development: MVC vs MVVM

  - by Mel

  I've started coding for android and I'm having difficulty trying to properly partition my code. I always end up with a very tight coupling between my UI logic and the actual controls I use to represent them. I have background in both WPF MVVM and ASP.net MVC so I'm familiar with those patterns. After some digging, I found Android Binding. It seems nice and fits nicely with my WPF background. However, it bugs me that its not built in. I'm pretty sure that the android makers have thought of this when designing the android programming interface. So my question is, what is the best practice pattern to use when developing in android, if any. I have looked and looked at their site but didn't find anything...

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