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  • How is technical debt best measured? What metric(s) are most useful?

    - by throp
    If I wanted to help a customer understand the degree of technical debt in his application, what would be the best metric to use? I've stumbled across Erik Doernenburg's code toxicity, and also Sonar's technical debt plugin, but was wondering what others exist. Ideally, I'd like to say "system A has a score of 100 whereas system B has a score of 50, so system A will most likely be more difficult to maintain than system B". Obviously, I understand that boiling down a complex concepts like "technical debt" or "maintainability" into a single number might be misleading or inaccurate (in some cases), however I need a simple way to convey the to a customer (who is not hands-on in the code) roughly how much technical debt is built into their system (relative to other systems), for the goal of building a case for refactoring/unit tests/etc. Again, I'm looking for one single number/graph/visualization, and not a comprehensive list of violations (e.g. CheckStyle, PMD, etc.).

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  • How to Disable Home Folder Encryption After Installing Ubuntu

    - by Chris Hoffman
    Ubuntu offers to encrypt your home directory during installation. The encryption has some drawbacks – there’s a performance penalty and recovering your files is more difficult. If you change your mind later, you can remove the encryption without reinstalling Ubuntu. The process of removing the encryption involves creating a backup copy of your home directory without encryption, deleting the existing home directory, removing the encryption utilities, and moving the unencrypted copy back into place. HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It HTG Explains: Learn How Websites Are Tracking You Online

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  • How to determine if a programming language is verbose or terse?

    - by sunpech
    Programming languages can often be described as verbose or terse. From my understanding, a verbose language is easy to read and understand, while a terse language is concise and neat, but more difficult to read. Should there be other things to consider in the definitions? It seems much of the popular programming languages of today are verbose, and these terms two terms are only used to describe a language as being more or less, relative to than another language. How do we determine if a programming language is more verbose/terse over another? Example: Is C# more verbose than Java?

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  • Low coupling processing big quantities of data

    - by vitalik
    Usually I achieve low coupling by creating classes that exchange lists, sets, and maps between them. Now I am developing a batch application and I can't put all the data inside a data structure because there isn't enough memory. I have to read and process one chunk of data and then going to the next one. So having low coupling is much more difficult because I have to check somewhere if there is still data to read, etc. What I am using now is: Source - Process - Persist The classes that process have to ask to the Source classes if there are more rows to read. What are the best practices and or useful patterns in such situations? I hope I am explaining myself, if not tell me.

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  • How to achieve a Gaussian Blur effect for shadows in LWJGL/Slick2D?

    - by user46883
    I am currently trying to implement shadows into my game, and after a lot of searching in the interwebs I came to the conclusion that drawing hard edged shadows to a low resolution pass combined with a Gaussian blur effect would fit best and make a good compromise between performance and looks - even though theyre not 100% physically accurate. Now my problem is, that I dont really know how to implement the Gaussian blur part. Its not difficult to draw shadows to a low resolutions buffer image and then stretch it which makes it more smooth, but I need to add the Gaussian blur effect. I have searched a lot on that and found some approachs for GLSL, some even here, but none of them really helped it. My game is written in Java using Slick2D/LWJGL and I would appreciate any help or approaches for an algorithm or maybe even an existing library to achieve that effect. Thanks for any help in advance.

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  • Methods of learning / teaching programming

    - by Mark Avenius
    When I was in school, I had a difficult time getting into programming because of a catch-22 in the learning process: I didn't know how to write anything because I didn't know what keywords and commands meant. For example (as a student, I would think), "what does this using namespace std; thing do anyway? I didn't know what keywords and commands meant because I hadn't written anything. This basically led me to spending countless long night cursing the compiler as I made minor tweaks to my assignments until they would compile (and hopefully perform whatever operation they were supposed to). Is there a teaching/learning method that anyone uses that gets around this catch-22? I am trying to make this non-argumentative, which is why I don't want to know the 'best' method, but rather which methods exist.

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  • Understanding Regular Expressions (focus on URL Rewrite)–Part 10 (Sub-Part 1 of 2)

    - by OWScott
    Regular Expressions can seem difficult to understand.  In today’s lesson I attempt to bring this down to earth and make it understandable and useful for the web administrator.  While this focuses on URL Rewrite, this lesson is useful for Visual Studio, ASP.NET development and JavaScript development also. I couldn’t keep this within 10-15 minutes so this is Part 1 of 2 on Regular Expressions. This is week 10 of a 52 week series on various web administration related tasks.  Past and future videos can be found here.

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  • I'm 15 years old. What would you recommend for resources?

    - by JacKeown
    Hi. I'm a 15 year old kid who seems to excel in all of his classes, likes talking in 3rd person, and wants to learn more about programming and a little about html/php stuff. I already know a little python and I'm hoping to eventually learn Java/Javascript and C. I've been looking around and I've found some online lectures like this and some other tutorials that are so mind numbingly boring and difficult to understand...I was wondering if any of you knew of any good books or other resources that would actually teach me everything I'd need to know incrementally... Thanks in advance!

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  • Network Multiplayer in Flash

    - by shadowprotocol
    Flash has come a long way in the last decade, and it's a well-kept secret getting a flash game to connect to a multi-client server for chat and/or basic avatar movement in real time. Why has the industry as a whole not made this a common-knowledge type of thing yet? We keep pushing to the web but I am finding it incredibly difficult gathering learning material on this subject. Sure, I can find multi-client server socket tutorials in various languages (using select statements and/or threads to handle multiple socket connections), but in regards to Flash applications inside of a browser? NOPE! Can everyone please share what they know? :] It's a subject I'd really love to get into but I'm afraid I just honestly don't know enough about how to do it. Thanks!

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  • dash all over my unity in asus k45vd

    - by sajjad
    I installed ubuntu 13.10 in asus k45vd laptop. sometimes when I'm working with my laptop I see dashes all over my screen(showing them takes maybe less than one secconds so it's difficult to take screenshot.) This problem just is in unity in other desktops which I installed like xfce4, kde, gnome-shell there isn't this problem. in ubuntu 13.04 there was this problem in my laptop too, and I tested ubuntu in another laptop asus k55vd there is this problem in that laptop too. I thought this a unity bug in asus kxxvd series! is there any solution for this problem?

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  • Ubuntu Lagging even LXDE freezes

    - by Anas Ismail Khan
    Laptop, i3, Ram: 2GB. Using 14.04LTS... and it lags like hell. Even if i open more than 4 tabs in Chrome, it freezes, and often I have no choice but to restart and multi-tasking is kinda difficult and at times impossible. Now there's whole thing about Lubuntu and LXDE that are suposed to be super-fast.. installed LXDE.. mind, not lubuntu-desktop. just LXDE. And it too freezes every now and then, and trust this.. when it freezes, it does so worse than Unity.. ESPECIALLY when i start PCManFM... and mount a disk or two... Any ideas as to why this is happening.. The minimum requirements for Unity are supposed to be 1Gig RAM.. and people are running it fine even on 512 MB...

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  • Should devs, testers and business users have one unified test script?

    - by Carlos Jaime C. De Leon
    In development, I would normally have my own test scripts that would document the data, scenarios and execution steps that I plan to test; this is my dev test plan. When the functionality has been deployed to Test, testers test it using their own test script that they wrote. In UAT, the business user then tests using their own test plan. In retrospect, it looks like this provides a better coverage, with dev tests having a mix of black and white box testing, while testers and business users focus on black box testing. But on the other hand, this brings up distinct test cases that only are executed per stage (ie. some cases which testers thought of are only executed on Test stage) and it would like the dev missed it, which makes it a finding/bug. Is it worth consolidating the test scripts from the start? Thus using one unified test script, or is it abit difficult to do this upfront?

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  • Changing Platform

    - by Liam McLennan
    From time to time a developer makes a break from their platform of choice (.NET, Java, VB, Access, COBOL) and moves to perceived greener pastures. Zed Shaw did it, jumping from Ruby to Python, and Mike Gunderloy went from .NET to Rails. But it can be difficult to change platform. My clients don’t come to me looking for  a software developer, they come looking for a .NET developer. This is a tragic side effect of big software companies marketing. If your village is under attack by bandits, would you turn away the first seven samurai who offered to help because you didn’t like their swords? What matters is how effectively they can defend your village. You should not tell your carpenter what sort of hammer to use and you should not tell your software developer what platform to use.

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  • Developing JSON API for a Carpool Engine

    - by Siddharth
    I am developing a new set of API methods for carpooling/cab booking, so if a developer needs to develop an app or webportal for carpooling, he can call my JSON API. Basically making it easy for developers. My API current has: AddVehicle AddJourney SearchJourney SubscribeToThisJourney(journey) SubscriberList(journey) to get list of people who have subscribed for this journey AcceptSubscription(subscriber) AcceptedSubcriberList SubscriberList to get list of providers I have subscribed to I need help with replacing subscriber with something else. It's difficult to remember, and confusing when you see 3 methods that mean very different things: SubscriberList, SubscribedToThisJourneyList and AcceptedSubscriberList. Confusing to remember. One is a list of who I have subscribed to Who has subscribed to me Whose subscription I have accepted How can I name these methods to make them easier to understand and remember?

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  • Entity Type specific updates in entity component system

    - by Nathan
    I am currently familiarizing myself with the entity component paradigm. For an example, take a collision system, that detects if entities collide and if they do let them explode. So the collision system has to test collision based on the position component and then set the state of those entities to exploding. But what if the "effect" (setting the state to exploding) is different for different entities? For example, a ship fades out while for an asteroid a particle system must be created. Since entities and components are only data, this must happen in some system. The collision system could do it, but then it must switch over the entity type, which in my opinion is a cumbersome and difficult to extend solution. So how do I trigger "entity type dependend" updates on an entity?

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  • Why is it impossible to produce truly random numbers?

    - by Vinoth Kumar
    I was trying to solve a hobby problem that required generating a million random numbers. But I quickly realized, it is becoming difficult to make them unique. I picked up Algorithm Design Manual to read about random number generation. It has the following paragraph that I am fully not able to understand. Unfortunately, generating random numbers looks a lot easier than it really is. Indeed, it is fundamentally impossible to produce truly random numbers on any deterministic device. Von Neumann [Neu63] said it best: “Anyone who considers arithmetical methods of producing random digits is, of course, in a state of sin.” The best we can hope for are pseudo-random numbers, a stream of numbers that appear as if they were generated randomly. Why is it impossible to produce truly random numbers in any deterministic device? What does this sentence mean?

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  • How can I adjust system volume from within XBMC?

    - by d3vid
    While running XBMC, I can adjust the volume of the XBMC application itself. However, this volume is limited by the current system volume. For example, if the system volume is at 80% and XBMC is at 100%, I am effectively at 80% and cannot go higher. Or if the sound is too soft and needs a boost, I would normally increase the system volume beyond 100%. XBMC takes over the whole screen, so the system volume is not accessible. Pressing the Super key brings up the dash and top menu, but clicking on it is difficult and inconsistent, and very quickly XBMC takes over the screen again. How can I adjust the system volume without having to quit XBMC?

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  • How to name an subclass that add a minor, detailed thing?

    - by Louis Rhys
    What is the most concise (yet descriptive) way of naming a subclass that only add a specific minor thing to the parent? I encountered this case a lot in WPF, where sometime I have to add a small functionality to an out-of-the-box control for specific cases. Example: TreeView doesn't change the SelectedItem on right-click, but I have to make one that does in my application. Some possible names are TreeViewThatChangesSelectedItemOnRightClick (way too wordy and maybe difficult to read because there is so many words concantenated together) TreeView_SelectedItemChangesOnRightClick (slightly more readable, but still too wordy and the underscore also breaks the normal convention for class names) TreeViewThatChangesSIOnRC (non-obvious acronym), ExtendedTreeView (more concise, but doesn't describe what it is doing. Besides, I already found a class called this in the library, that I don't want to use/modify in my application). LouisTreeView, MyTreeView, etc. (doesn't describe what it is doing). It seems that I can't find a name which sounds right. What do you do in situation like this?

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  • Is it OK to learn an algorithm from an open source project, and then implement it in a closed source project?

    - by Chris Barry
    Reference The post that started it all In order to clear up the original question I asked in a provocative manner, I have posed this question. If you learn an algorithm from an open source project, is it OK to use that algorithm in a separate closed sourced project? And if not, does that imply that you cannot use that knowledge ever again? If you can use it, what circumstance could that be? Just to clarify, I am not trying to evade a licence, otherwise I would not have asked the question in the first place. I believe this presents a difficult question and it is interesting to know where the debate can end up.

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  • Interview with Ronald Bradford about MySQL Connect

    - by Keith Larson
    Ronald Bradford,  an Oracle ACE Director has been busy working with  database consulting, book writing (EffectiveMySQL) while traveling and speaking around the world in support of MySQL. I was able to take some of his time to get an interview on this thoughts about theMySQL Connect conference. Keith Larson: What where your thoughts when you heard that Oracle was going to provide the community the MySQL Conference ?Ronald Bradford: Oracle has already been providing various different local community events including OTN Tech Days and  MySQL community days. These are great for local regions both in the US and abroad.  In previous years there has been an increase of content at Oracle Open World, however that benefits the Oracle community far more then the MySQL community.  It is good to see that Oracle is realizing the benefit in providing a large scale dedicated event for the MySQL community that includes speakers from the MySQL development teams, invested companies in the ecosystem and other community evangelists.I fully expect a successful event and look forward to hopefully seeing MySQL Connect at the upcoming Brazil and Japan OOW conferences and perhaps an event on the East Coast.Keith Larson: Since you are part of the content committee, what did you think of the submissions that were received during call for papers?Ronald Bradford: There was a large number of quality submissions to the number of available presentation sessions. As with the previous years as a committee member for the annual MySQL conference, there is always a large variety of common cornerstone MySQL features as well as new products and upcoming companies sharing their MySQL experiences. All of the usual major players in the ecosystem will in presenting at MySQL Connect including Facebook, Twitter, Yahoo, Continuent, Percona, Tokutek, Sphinx and Amazon to name a few.  This is ensuring the event will have a large number of quality speakers and a difficult time in choosing what to attend. Keith Larson: What sessions do you look forwarding to attending? Ronald Bradford: As with most quality conferences you can only be in one place at one time, so with multiple tracks per session it is always difficult to decide. The continued work and success with MySQL Cluster, and with a number of sessions I am sure will be popular. The features that interest me the most are around the optimizer, where there are several sessions on new features, and on the importance of backups. There are three presentations in this area to choose from.Keith Larson: Are you going to cover any of the content in your books at your MySQL Connect sessions?Ronald Bradford: I will be giving two presentations at MySQL Connect. The first will include the techniques available for creating better indexes where I will be touching on some aspects of the first Effective MySQL book on Optimizing SQL Statements.  In my second presentation from experiences of managing 500+ AWS MySQL instances, I will be touching on areas including SQL tuning, backup and recovery and scale out with replication.   These are the key topics of the initial books in the Effective MySQL series that focus on performance, scalability and business continuity.  The books however cover a far greater amount of detail then can be presented in a 1 hour session. Keith Larson: What features of MySQL 5.6 do you look forward to the most ?Ronald Bradford: I am very impressed with the optimizer trace feature. The ability to see exposed information is invaluable not just for MySQL 5.6, but to also apply information discerned for optimizing SQL statements in earlier versions of MySQL.  Not everybody understands that it is easy to deploy a MySQL 5.6 slave into an existing topology running an older version if MySQL for evaluation of many new features.  You can use the new mysqlbinlog streaming feature for duplicating master binary logs on an older version with a MySQL 5.6 slave.  The improvements in instrumentation in the Performance Schema are exciting.   However, as with my upcoming Replication Techniques in Depth title, that will be available for sale at MySQL Connect, there are numerous replication features, some long overdue with provide significant management benefits. Crash Save Slaves, Global transaction Identifiers (GTID)  and checksums just to mention a few.Keith Larson: You have been to numerous conferences, what would you recommend for people at the conference? Ronald Bradford: Make the time to meet and introduce yourself to the speakers that cover the topics that most interest you. The MySQL ecosystem has a very strong community.  The relationships you build with presenters, developers and architects in MySQL can be invaluable, however they are created over time. Get to know these people, interact with them over time.  This is the opportunity to learn more then just the content from a 1 hour session. Keith Larson: Any additional tips to handling the long hours ? Ronald Bradford: Conferences can be hard, especially with all the post event drinking.  This is a two day event and I am sure will include additional events on Friday and Saturday night so come well prepared, and leave work behind. Take the time to learn something new.   You can always catchup on sleep later. Keith Larson: Thank you so much for taking some time to do this I look forward to seeing you at the MySQL Connect conference.  Please stay tuned here for more updates on MySQL. 

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  • What are the downsides to using dependency injection?

    - by kerry
    I recently came across an interesting question on stack overflow with some interesting reponses.  I like this post for three reasons. First, I am a big fan of dependency injection, it forces you to decouple your code, create cohesive interfaces, and should result in testable classes. Second, the author took the approach I usually do when trying to evaluate a technique or technology; suspend personal feelings and try to find some compelling arguments against it. Third, it proved that it is very difficult to come up with a compelling argument against dependency injection. What are the downsides to using dependency injection?

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  • The term 'enterprise'

    - by SkonJeet
    I see the term 'enterprise' being thrown around software developers and programmers a lot and used loosely it seems. en·ter·prise/'ent?r?priz/ Noun: A project or undertaking, typically one that is difficult or requires effort. Initiative and resourcefulness. Can someone please clarify what this term actually encompasses? "At an enterprise level", "enterprise scale". There are even "enterprise editions" of things. What exactly does it mean? It obviously doesn't make sense judging by the above definition so more specifically to software what does one mean when using the word enterprise??? EDIT: To add a spin on this - how does this term then fit into phrases such as Enterprise Framework Model? What does data access and data context have to do with company-wide descriptions?

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  • Is data integrity possible without normalization?

    - by shuniar
    I am working on an application that requires the storage of location information such as city, state, zip code, latitude, and longitude. I would like to ensure: Location data is accurate Detroit, CA Detroit IS NOT in California Detroit, MI Detroit IS in Michigan Cities and states are spelled correctly California not Calefornia Detroit not Detriot Cities and states are named consistently Valid: CA Detroit Invalid: Cali california DET d-town The D Also, since city/zip data is not guaranteed to be static, updating this data in a normalized fashion could be difficult, whereas it could be implemented as a de facto location if it is denormalized. A couple thoughts that come to mind: A collection of reference tables that store a list of all states and the most common cities and zip codes that can grow over time. It would search the database for an exact or similar match and recommend corrections. Use some sort of service to validate the location data before it is stored in the database. Is it possible to fulfill these requirements without normalization, and if so, should I denormalize this data?

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  • Adventures in Scrum: Lesson 1 &ndash; The failed Sprint

    - by Martin Hinshelwood
    I recently had a conversation with a product owner that wanted to have the Scrum team broken up into smaller units so that less time was wasted on the Scrum Ceremonies! Their complaint was around the need in Scrum to have the entire “Team” (7+-2) involved in the sizing of the work during the “Sprint Planning Meeting”.  The standard flippant answer of all Scrum professionals, “Well that's not Scrum”, does not get you any brownie points in these situations. The response could be “Well we are not doing Scrum then” which in turn leads to “We are doing Scrum…But, we have split the scrum team into units of 2/3 so that they can concentrate on a specific area of work”. While this may work, it is not Scrum and should not be called so… It is just a form of Agile. Don’t get me wrong at this stage, there is nothing wrong with Agile, just don’t call it Scrum. The reason that the Product Owner wants to do this is that, in effect, through a number of miscommunications and failings in our implementation of Scrum, there was NO unit of potentially Shippable software at the end of the first sprint. It does not matter to them that most Scrum teams will fail the first Sprint, even those that are high performing teams. Remember it is the product owners their money! We should NOT break up scrum teams into smaller units for the purpose of having less people tied up in the Scrum Ceremonies. The amount of backlog the Team selects is solely up to the Team… Only the Team can assess what it can accomplish over the upcoming Sprint. - Scrum Guide, Scrum.org The entire team must accept the work and in order to understand what they can accept they must be free to size it as a team. This both encourages common understanding and increases visibility on why team members think a task is of a particular size. This has the benefit of increasing the knowledge of the entire team in the problem domain. A new Team often first realizes that it will either sink or swim as a Team, not individually, in this meeting. The Team realizes that it must rely on itself. As it realizes this, it starts to self-organize to take on the characteristics and behaviour of a real Team. - Scrum Guide, Scrum.org This paragraph goes to the why of having the whole team at the meeting; The goal of Scrum it to produce a unit of potentially shippable software at the end of every Sprint. In order to achieve this we need high performing teams and this is what Scrum as a framework has been optimised to produce. I think that our Product Owner is understandably upset over loosing two weeks work and is losing sight the end goal of Scrum in the failures of the moment. As the man spending the money, I completely understand his perspective and I think that we should not have started Scrum on an internal project, but selected a customer  that is open to the ideas and complications of Scrum. So, what should we have NOT done on our first Scrum project: Should not have had 3 interns as the only on site resource – This lead to bad practices as the experienced guys were not there helping and correcting as they usually would. Should not have had the only experienced guys offsite – With both the experienced technical guys in completely different time zones it was difficult to get time for questions. Helping the guys on site was just plain impossible. Should not have used a part time ScrumMaster – Although the ScrumMaster attended all of the Ceremonies, because they are only in 2 full days of the week it makes it difficult for the team to raise impediments as they go. Should not have used a proxy product owner. – This was probably the worst decision that was made. Mainly because the proxy product owner did not have the same vision as the product owner. While Scrum does not explicitly reject the idea of a Proxy Product Owner, I do not think it works very well in practice. The “single wringable neck” needs to contain both the Money and the Vision as well as attending the required meetings. I will be brining all of these things up at the Sprint Retrospective and we will learn from our mistakes and move on. Do, Inspect then Adapt…   Technorati Tags: Scrum,Sprint Planing,Sprint Retrospective,Scrum.org,Scrum Guide,Scrum Ceremonies,Scrummaster,Product Owner Need Help? Professional Scrum Developer Training SSW has six Professional Scrum Developer Trainers who specialise in training your developers in implementing Scrum with Microsoft's Visual Studio ALM tools.

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  • Looking for a FormBuilder that gives me all images and sourcecode to my form

    - by Tracy Anne
    Wow, I started my search this morning and didn't think it would be so difficult to find. I'm just tired of spending hours putting together simple html forms in dreamweaver. I'm an enthusiast web developer mostly focused on php and mysql. I hate CSS and HTML and I'm looking for a simple program that will put a form together for me where I can then completely embed the form into my site. I'll do all of the programming to attach it to my database I just need the form and images. I've looked into jotform, wufoo, 123forms etc but it seems like they all want to keep my form on their servers in one way or another. It looked like jotform had a developers version but $450 bucks is a little steep for a part timer like me. Is there no simple software out there that will throw a nice stylized form together for me?

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