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• Hard-copy approaches to time tracking

  - by STW

  I have a problem: I suck at tracking time-on-task for specific feature/defects/etc while coding them. I tend to jump between tasks a fair bit (partly due to the inherit juggling required by professional software development, partly due to my personal tendancy to focus on the code itself and not the business process around code). My personal preference is for a hard-copy system. Even with gabillions of pixels of real-estate on-screen I find it terribly distracting to keep a tracking window convienient; either I forget about it or it gets in my ways. So, looking for suggestions on time-tracking. My only requirement is a simple system to track start/stop times per task. I've considered going as far as buying a time-clock and giving each ticket a dedicated time-card. When I start working on it, punch-in; when done working, punch-out.

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• How to translate formulas into form of natural language?

  - by Ricky

  I am recently working on a project aiming at evaluating whether an android app crashes or not. The evaluation process is 1.Collect the logs(which record the execution process of an app). 2.Generate formulas to predict the result (formulas is generated by GP) 3.Evaluate the logs by formulas Now I can produce formulas, but for convenience for users, I want to translate formulas into form of natural language and tell users why crash happened.(I think it looks like "inverse natural language processing".) To explain the idea more clearly, imagine you got a formula like this: 155 - count(onKeyDown) >= 148 It's obvious that if count(onKeyDown) 7, the result of "155 - count(onKeyDown) = 148" is false, so the log contains more than 7 onKeyDown event would be predicted "Failed". I want to show users that if onKeyDown event appears more than 7 times(155-148=7), this app will crash. However, the real formula is much more complicated, such as: (< !( ( SUM( {Att[17]}, Event[5]) <= MAX( {Att[7]}, Att[0] >= Att[11]) OR SUM( {Att[17]}, Event[5]) > MIN( {Att[12]}, 734 > Att[19]) ) OR count(Event[5]) != 1 ) > (< count(Att[4] = Att[3]) >= count(702 != Att[8]) + 348 / SUM( {Att[13]}, 641 < Att[12]) mod 587 - SUM( {Att[13]}, Att[10] < Att[15]) mod MAX( {Att[13]}, Event[2]) + 384 > count(Event[10]) != 1)) I tried to implement this function by C++, but it's quite difficult, here's the snippet of code I am working right now. Does anyone knows how to implement this function quickly?(maybe by some tools or research findings?)Any idea is welcomed: ) Thanks in advance.

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• How can I best study a problem to determine whether recursion can/should be used?

  - by user10326

  In some cases, I fail to see that a problem could be solved by the divide and conquer method. To give a specific example, when studying the find max sub-array problem, my first approach is to brute force it by using a double loop to find the max subarray. When I saw the solution using the divide and conquer approach which is recursion-based, I understood it but ok. From my side, though, when I first read the problem statement, I did not think that recursion is applicable. When studying a problem, is there any technique or trick to see that a recursion based (i.e. divide and conquer) approach can be used or not?

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• Storing Attendance Data in database

  - by Ali Abbas

  So i have to store daily attendance of employees of my organisation from my application . The part where I need some help is, the efficient way to store attendance data. After some research and brain storming I came up with some approaches . Could you point me out which one is the best and any unobvious ill effects of the mentioned approaches. The approaches are as follows Create a single table for whole organisation and store empid,date,presentstatus as a row for every employee everyday. Create a single table for whole organisation and store a single row for each day with a comma delimited string of empids which are absent. I will generate the string on my application. Create different tables for each department and follow the 1 method. Please share your views and do mention any other good methods

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• Should mock objects for tests be created at a high or low level

  - by Danack

  When creating unit tests for those other objects, what is the best way to create mock objects that provide data to other objects. Should they be created at a 'high level' and intercept the calls as soon as possible, or should they be done at a 'low level' and so make as much as the real code still be called? e.g. I'm writing a test for some code that requires a NoteMapper object that allows Notes to be loaded from the DB. class NoteMapper { function getNote($sqlQueryFactory, $noteID) { // Create an SQL query from $sqlQueryFactory // Run that SQL // if null // return null // else // return new Note($dataFromSQLQuery) } } I could either mock this object at a high level by creating a mock NoteMapper object, so that there are no calls to the SQL at all e.g. class MockNoteMapper { function getNote($sqlQueryFactory, $noteID) { //$mockData = {'Test Note title', "Test note text" } // return new Note($mockData); } } Or I could do it at a very low level, by creating a MockSQLQueryFactory that instead of actually querying the database just provides mock data back, and passing that to the current NoteMapper object. It seems that creating mocks at a high level would be easier in the short term, but that in the long term doing it at a low level would be more powerful and possibly allow more automation of tests e.g. by recording data in an out of a DB and then replaying that data for tests. Is there a recommended way of creating mocks? Are there any hard and fast rules about which are better, or should they both be used where appropriate?

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• how to write good programming logic?

  - by user106616

  recently I got job as a java developer, and now I have assigned project too. I want to know what is a good logic? when I check in the code my team lead is saying that its a good code. But when it comes to my project manager he is saying that its a bad code. And he is changing my code, after his changes if I see his code its really very very good and even simple. can you please tell me how to develop the good program, good logic? what is the best way to structure a problem in terms of code?

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• Etymology of software project names [closed]

  - by Benoit

  I would like to have a reference community wiki here in order to know what etymology software name have or why they are named that way. I was wondering why Imagemagick's mogrify was named this way. Today I wondered the same for Apache Lucene. It would be handy to have a list here. Could we extend such a list? Let me start and let you edit it please. I will ask for this to be community wiki. For each entry please link to an external reference. GNU Emacs: stand for “Editor MACroS”. Apache Lucene: Armenian name Imagemagick mogrify: from “transmogrify”. Thanks.

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• Ruby on Rails background API polling

  - by Matthew Turney

  I need to integrate a free/busy calendar integration with Zimbra. Unlike outlook, it seems, Zimbra requires polling their API. I need to be able to grab the free/busy data in background tasks for 10's of thousands of users on a regular time interval, preferably every few minutes. What would be the best way to implement this in a Rails application without bogging down our current resque tasks? I have considered moving this process to something like node.js or something similar in Ruby. The biggest problem is that we have no control over the IO, as each clients Zimbra instances could be slow and we don't want to create a huge backup in tasks. Thoughts and ideas?

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• Is creating a full application in Silverlight advisable?

  - by Anthony

  Is creating a huge public site fully in Silverlight really advisable? for eg. an ecommerce site. I don't want to start any debate but actually I feel Silverlight shouldn't be used for full website because the biggest loss you incur is of SEO. No search engines till today can parse the xap file and index it based on it's content. You can get around it by doing ifs and thens like if Silverlight is not supported then make an Asp.Net equivalent page for it but that only doubles our effort of making application, more than anything else. Why write double code in 2 applications meant for the same purpose. If that is the only option why not create Asp.Net application only. What are your views? Thanks in advance :)

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• Design of input files reading when it comes to defaults/transformations

  - by Stefano Borini

  Suppose you have an application that reads an input file, on a language that does not support the concept of None. The input is read, parsed, and the contents are stored on a structure for later use. Now, in general you want to keep into account transformation of the data from the input, such as adding default values when not specified, or adding full path information to relative path specified in the input. There are two different strategies to achieve this. The first strategy is to perform these transformations at input file reading time. In practice, you put all the intelligence into the input parser, and your application has no logic to deal with unexpected circumstances, such as an unspecified value. You lose the information of what was specified and what wasn't, but you gain in black-boxing the details. Your "running code" needs that information in any case and in a proper form, and is not concerned if it's the default or a user-specified information. The second strategy is to have the file reader a real one-to-one mapper from the file to a memory-stored object, with no intelligent behavior. unspecified values are not filled (which may however be a problem in languages not supporting None) and data is stored verbatim from the file. The intelligence for recovery must now go into the "running code", which must check what was specified in the file, eventually fall back to a default, or modify the input properly before using it. I would like to know your opinion on these two approaches, and in particular which one you found the most frequently implemented.

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• What should my "code sample" look like?

  - by thesunneversets

  I've just had quite a good phone interview (for a CakePHP-related position, not that it's especially important to the question). The interviewer seemed to be impressed with my resume and personality. At the end, though, he asked me to email him a code sample from my existing work project, "to check you're not secretly a terrible programmer, ha ha!" I'm not too worried that my code can't stand on its own two feet, but I'm very much an intermediate programmer rather than an expert. What obvious pitfalls should I make sure my code sample doesn't fall into, in case they rule me out on the spot? Secondly, and this is probably the harder part of the question to answer, what features in a code sample would be so impressive that they would instantly make you much more favourably inclined towards the programmer? All ideas or suggestions welcomed!

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• How to Mentor a Junior Developer

  - by Josh Johnson

  This title is a little broad but I may need to give a little background before I can ask my question properly. I know that similar questions have been asked here already. But in my case I'm not asking if I should be mentoring someone or if the person is a good fit for being a software developer. That is not my place to judge. I have not been asked outright, but it is apparent that myself and other fellow senior developers are to mentor the new developers that start here. I have no problem with this whatsoever and, in many cases, it lends me a fresh perspective on things and I end up learning in the process. Also, I remember how beneficial it was in the beginning of my career when someone would take some time to teach me something. When I say "new developer" they could be anywhere from fresh out of college to having a year or two of experience. Recently and in the past we've had people start here who seem to have an attitude toward development/programming which is different from mine and hard for me to reconcile; they seem to extract just enough information to get the task done but not really learn from it. I find myself going over and over the same issues with them. I understand that part of this could be a personality thing, but I feel it's my job to do my best and sort of push them out of the nest while they're under my wing, so to speak. How can I impart just enough information so that they will learn but not give so much as to solve the problem for them? Or perhaps: What's the proper response to questions that are designed to take the path of least resistance and, in essence, force them to learn instead of take the easy way out? These questions are probably more general teaching questions and don't have that much to do specifically with software development. Note: I do not get a say in what tasks they are working on. Management doles the task out and it could be anything from a very simple bug fix to starting an entire application by themselves. While this is not ideal by any means and obviously presents its own gauntlet of challenges, I feel it's a topic best left for another question. So the best I can do is help them with the problem at hand and try to help them break it down into simpler problems and also check their commit logs and point out mistakes that they made. My main objectives are to: Help them out and give them the tools they need to start becoming more self-reliant. Steer them in the right direction and break bad development habits early on. Lessen the amount of time I spend with them (the personality type described above seems to need much more one-on-one time and does not do well over IM or email. While that's generally fine, I can't always stop what I'm working on, break my stride, and help them debug an error on a moments notice; I have my own projects that need to get done).

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• Why doesn't Haskell have type-level lambda abstractions?

  - by Petr Pudlák

  Are there some theoretical reasons for that (like that the type checking or type inference would become undecidable), or practical reasons (too difficult to implement properly)? Currently, we can wrap things into newtype like newtype Pair a = Pair (a, a) and then have Pair :: * -> * but we cannot do something like ?(a:*). (a,a). (There are some languages that have them, for example, Scala does.)

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• What platform to use for browser based turn based strategy game

  - by sunwukung

  I want to write a browser based strategy game that can be played by two players in separate locations. The game itself is predominantly turn based. To that end, I want to determine the correct platform on which to build this game. To prevent gamers "gaming" the system, the business logic needs to reside in the server. I could arguably use AJAX for a large part of the games functionality, but at two key points in the game loop, the opposing player can "counter" the current players move. In addition, when it's time for the players to swap, AJAX polling is likely to fall short, so it's starting to look like WebSockets is going to be a requirement to pull this off smoothly. So, the remaining question is regarding the back end. I'd kinda like to build this in Python/Flask - but this is primarily out of wanting to tackle a project with that language, not neccessarily because it's the appropriate tool for the job. The next most likely candidate has got to be NodeJS given it's (apparently) tighter integration with the WebSockets protocol. My question, then, is regarding the best platform on which to pursue this objective.

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• How do you manage the testing of your Android software on physical devices?

  - by Philip Regan

  I'm in charge of managing mobile application development at my company, and I am currently building a mobile device "library" for testing. Essentially, we want to have a representative device in-house for each of the OSes we are developing for, currently iOS (iPhone-only), Blackberry, and Android. Simulators only go so far, but I'm placing into the process a step to test software on the devices themselves. The problem we're finding is with Android. I don't think any of us here ever really understood just how fragmented the whole platform is until we started looking at devices to acquire. We are going to wait until v2.3 of Android is released, but which products to choose? Do we go by the most popular by market share? Do we get a small range of products by specs from least to most powerful overall? We're trying to avoid having to manage a dozen different devices to test each app, if not because of cost if only for the repeated time sink. How do you manage the testing of your Android software on physical devices?

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• Why should ViewModel route actions to Controller when using the MVCVM pattern?

  - by Lea Hayes

  When reading examples across the Internet (including the MSDN reference) I have found that code examples are all doing the following type of thing: public class FooViewModel : BaseViewModel { public FooViewModel(FooController controller) { Controller = controller; } protected FooController Controller { get; private set; } public void PerformSuperAction() { // This just routes action to controller... Controller.SuperAction(); } ... } and then for the view: public class FooView : BaseView { ... private void OnSuperButtonClicked() { ViewModel.PerformSuperAction(); } } Why do we not just do the following? public class FooView : BaseView { ... private void OnSuperButtonClicked() { ViewModel.Controller.SuperAction(); // or, even just use a shortcut property: Controller.SuperAction(); } }

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• Is Intellisense faster in Visual Studio 2012 compared to Visual Studio 2010 for C++ projects?

  - by syplex

  We switched to VS2010 from VS2003 a few months ago, and there are many many improvements. But the speed of Intellisense is not one of them (although it does generate higher quality results, which is great). I read that Intellisense and the MSDN help system were being improved in VS2012, so I'm curious if its actually faster? The only data I could find were graphs of an early release (VS2011). For the record, I am using a vanilla install of VS2010 with SP1 on Windows 7 SP1 (x64). No plugins or add-ins running. What I'm looking for specifically: Has the speed of intellisense autocomplete improved? Has the speed of F12 (goto definition) improved? The answers to these questions will help in determining if VS2012 is worth the money to upgrade at this time as the intellisense slowness would be the only major reason for upgrading. I'd also be interested in knowing if the help system has improved. I'm currently using MSDN help from VS2008SP1 because it has filtering and is faster.

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• Web to Print system - which client side technology should I use

  - by mr null

  I'm getting started to develop Web to Print system. My main concern is which client-side techology should I use: jQuery/CSS Flex/ActionScript or something else? For now, idea is that user/customer choose Product eg: Business card Attributes: Dimensions,Paper type, ... etc Template or blank Adjust product (editor) Preview & order Output should be PDF 300dpi. My main issue is: adding/adjusting text in editor. (font size, font family...). Because application should be cross browser. And I think that 10px Arial can't be the same in Firefox 5 and IE 8. It must be pixel perfect in every browser. If somebody order $100 of business cards, and text is different that he/she saw when ordering - that is a big problem. So, Flash platform should be the answer. But, as I see it's dying technology, 2012 is here - HTML5 is replacing Flash rapidly. I hope that you understand me, so every guideline or few smart words would be very appreciating.

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• How can I justify software testing to management?

  - by Nate

  I work for a small company (less than 200 employees) whose software group only makes up a small part of our staff (4 employees, occasionally with a few contractors). The four of us have been making strides in transitioning to better practices, and one of the next logical steps is to improve our testing. As anyone who has done any meaningful tests knows, testing takes a lot of time - and at my company, it takes too much time to justify to management, so we generally do what little we do on the sly. I don't think this is serving us well, as we keep coming up against otherwise avoidable problems when we ship under-tested software. I would like to be able to come to management with a justification for hiring a dedicated software test engineer (someone who can both write automated tests and perform manual ones). Are there any good published studies that show the benefits of adding such a position to a small company? Where can I find information about costs associated with the position? I plan on doing a little number crunching on our own history, but having some external sources to point to would help bolster my case.

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• Drawing shapes dynamically on an image through web browser

  - by Tom Beech

  We have a scenario where we create floor plans of locations when we visit. The floor plan is finally shown on the web. It's come to the point now where we want to show floor plans but have a key with various items on them, when an item on the key is clicked, the image should highlight all the areas of the floorplan that have that specific item. I guess we're looking for some sort of open standard javascript lib to deal with SVG (has to work pre IE9 so pure SVG wont cut it) and the floor plans have to be able to be created through a .net application to be deployed on the web. I'd rather stay away from flash if at all possible to be honest. Below are a few conceptual images of what we're trying to achieve.

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• Algorithm for Shortest Job First with Preemption

  - by Shray

  I want to implement a shortest job first routine using C# or C++. Priority of Jobs are based on their processing time. Jobs are processed using a binary (min) heap. There are three types of jobs. Type 1 is when jobs come in between every 4-6 seconds, with processing times between 4-6. Type 2 job comes in between 8-12 seconds, with processing times between 8-12. Type 3 job comes in between 24-26 seconds, with processing times between 14-16. So far, I have written the binary heap functionality, but Im kinda confused on how to start processing spawn and also the processor. #include <iostream> #include <stdlib.h> #include <time.h> using namespace std; int timecounting = 20; struct process{ int atime; int ptime; int type; }; class pque{ private: int count; public: process pheap[100]; process type1[100]; process type2[100]; process type3[100]; process type4[100]; pque(){ count = 0; } void swap(int a, int b){ process tempa = pheap[a]; process tempb = pheap[b]; pheap[b] = tempa; pheap[a] = tempb; } void add(process c){ int current; count++; pheap[count] = c; if(count > 0){ current = count; while(pheap[count/2].ptime > pheap[current].ptime){ swap(current/2, current); current = current/2; } } } void remove(){ process temp = pheap[1]; // saves process to temporary pheap[1] = pheap[count]; //takes last process in heap, and puts it at the root int n = 1; int leftchild = 2*n; int rightchild = 2*n + 1; while(leftchild < count && rightchild < count) { if(pheap[leftchild].ptime > pheap[rightchild].ptime) { if(pheap[leftchild].ptime > pheap[n].ptime) { swap(leftchild, n); n = leftchild; int leftchild = 2*n; int rightchild = 2*n + 1; } } else { if(pheap[rightchild].ptime > pheap[n].ptime) { swap(rightchild, n); n = rightchild; int leftchild = 2*n; int rightchild = 2*n + 1; } } } } void spawn1(){ process p; process p1; p1.atime = 0; int i = 0; srand(time(NULL)); while(i < timecounting) { p.atime = rand()%3 + 4 + p1.atime; p.ptime = rand()%5 + 1; p1.atime = p.atime; p.type = 1; type1[i+1] = p; i++; } } void spawn2(){ process p; process p1; p1.atime = 0; srand(time(NULL)); int i = 0; while(i < timecounting) { p.atime = rand()%3 + 9 + p1.atime; p.ptime = rand()%5 + 6; p1.atime = p.atime; p.type = 2; type2[i+1] = p; i++; } } void spawn3(){ process p; process p1; p1.atime = 0; srand(time(NULL)); int i = 0; while(i < timecounting) { p.atime = rand()%3 + 25 + p1.atime; p.ptime = rand()%5 + 11; p1.atime = p.atime; p.type = 3; type3[i+1] = p; i++; } } void spawn4(){ process p; process p1; p1.atime = 0; srand(time(NULL)); int i = 0; while(i < timecounting) { p.atime = rand()%6 + 30 + p1.atime; p.ptime = rand()%5 + 8; p1.atime = p.atime; p.type = 4; type4[i+1] = p; i++; } } void processor() { process p; process p1; p1.atime = 0; int n = 1; int n1 = 1; int n2 = 1; for(int i = 0; i<timecounting;i++) { if(type1[n].atime == i) { add(type1[n]); n++; } if(type2[n1].atime == i) { add(type1[n1]); n1++; } if(type3[n2].atime == i) { add(type1[n2]); n2++; } /* if(pheap[1].atime <= i) { while(pheap[1].atime != 0){ pheap[1].atime--; i++; } remove(); }*/ } } };

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• There is any reason for which a delete method/field/function refactoring doesn't exist?

  - by raisercostin

  An operation in an interface is obsolete so I decided to delete it. It seems that there is no automatic support for such a "refactoring". For me is a refactoring operation since the behavior of the code will be preserved since nobody(tests, client apis) will notice that the operation was removed. In eclipse, in java code, on an method in an interface I have the following options: rename, move, change method signature, inline, extract interface, extract superclass, use supertype when possible, pull up, push down, introduce parameter objet, introduce indirection, generate declared type. There is any reason for which a delete method/field/function refactoring doesn't exist?

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• Do we need use case levels or not?

  - by Gabriel Šcerbák

  I guess no one would argue for decomposing use cases, that is just wrong. However sometimes it is necessary to specify use cases, which are on lower, more technical level, like for example authetication and authorization, which give the actor value, but are further from his business needs. Cockburn argues for levels when needed and explains how to move use cases from/to different levels and how to determine the right level. On the other hand, e.g. Bittner argues against use case levels, although he uses subflows and at the end of his book mentions, that at least two levels areneeded most of the time. My questionis, do you find use case levels necessary, helpful or unwanted? What are the reasons? Am I misssing some important arguments?

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• What is the supposed productivity gain of dynamic typing?

  - by hstoerr

  I often heard the claim that dynamically typed languages are more productive than statically typed languages. What are the reasons for this claim? Isn't it just tooling with modern concepts like convention over configuration, the use of functional programming, advanced programming models and use of consistent abstractions? Admittedly there is less clutter because the (for instance in Java) often redundant type declarations are not needed, but you can also omit most type declarations in statically typed languages that usw type inference, without loosing the other advantages of static typing. And all of this is available for modern statically typed languages like Scala as well. So: what is there to say for productivity with dynamic typing that really is an advantage of the type model itself?

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• What does your Lisp workflow look like?

  - by Duncan Bayne

  I'm learning Lisp at the moment, coming from a language progression that is Locomotive BASIC - Z80 Assembler - Pascal - C - Perl - C# - Ruby. My approach is to simultaneously: write a simple web-scraper using SBCL, QuickLisp, closure-html, and drakma watch the SICP lectures I think this is working well; I'm developing good 'Lisp goggles', in that I can now read Lisp reasonably easily. I'm also getting a feel for how the Lisp ecosystem works, e.g. Quicklisp for dependencies. What I'm really missing, though, is a sense of how a seasoned Lisper actually works. When I'm coding for .NET, I have Visual Studio set up with ReSharper and VisualSVN. I write tests, I implement, I refactor, I commit. Then when I'm done enough of that to complete a story, I write some AUATs. Then I kick off a Release build on TeamCity to push the new functionality out to the customer for testing & hopefully approval. If it's an app that needs an installer, I use either WiX or InnoSetup, obviously building the installer through the CI system. So, my question is: as an experienced Lisper, what does your workflow look like? Do you work mostly in the REPL, or in the editor? How do you do unit tests? Continuous integration? Packaging & deployment? When you sit down at your desk, steaming mug of coffee to one side and a framed photo of John McCarthy to the other, what is it that you do? Currently, I feel like I am getting to grips with Lisp coding, but not Lisp development ...

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