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• SQL SERVER Precision of SMALLDATETIME A 1 MinutePrecision

  I am myself surprised that I am writing this post today. I am going to present one of the very known facts of SQL Server SMALLDATETIME datatype. Even though this is a very well-known datatype, many a time, I have seen developers getting confused with precision of the SMALLDATETIME datatype. The precision of the datatype [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Attaching Events to Document Better Than Attaching Them to Elements?

  - by Todd

  While bouncing around StackOverflow, I've noticed a number of people attaching events (notably click events) to the document as opposed to the elements themselves. Example: Given this: <button id="myButton">CLICK ME</button> Instead of writing this (using jQuery just for brevity): $('#myButton').on('click', function() { ... }); They do this: $(document).on('click', function() { ... }); And then presumably use event.target to drill down to the element that was actually clicked. Are there any gains/advantages in capturing events at the document level instead of at the element level?

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• Documentation vs tutorials vs video tutorials - which one's better?

  - by Cat

  As a developer/software engineer, what would you say are the most helpful resources when attempting to learn and use a new system? If you had to integrate a new SDK into your codebase/application, which one of the following options would you much rather go with? documentation tutorials video tutorials Same question for learning a new framework (e.g. writing an iOS app, learning Python, integrating the Android SDK, etc.). I'm not referring to becoming an expert, just get to know enough to use a system/language/framework properly. This is a pretty general question, but I think it's very relevant to anyone who's doing engineering work, since learning how to use new systems quickly is a very important skill to have. Thank you!

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• Accidentally deleted my windows 7 while installing ubuntu, trying to reinstall it

  - by user286874

  I had Windows 7 Ultimate on my desktop and I believe have downloaded the correct ISO file. I've been trying to use GParted and UNetbootin to create a bootable usb by formatting to FAT32, flagging the boot box, and writing to the flash drive with UNetbootin, but there have been problems. When I select my flash drive in the BIOS, it just reflashes the BIOS stock MSI picture 4 times then boots to Ubuntu anyway. Details: it's a new computer, self-built, hasn't shown any problems in the past, got Windows 7 through r/softwareswap so it's a MSDN file, the flash drive is a Sandisk U3 Cruzer, I uninstalled the bloatware when Iwas using Windows 7, but in the BIOS it still comes up as "Sandisk U3 Cruzer" I don't have a cCD/DVD drive. I dont care if I have to completely delete ubuntu in the process, I just need Windows 7 back by monday. I think the problem is because of the cruzer and am going to pick up a different flash drive today.

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• Emacs-like keybindings system-wide?

  - by kermit666

  Is there a way to set Emacs-like keyboard shortcuts (at least the subset mentioned below) for the whole OS? This is possible in some apps such as the terminal, Emacs (go figure :) and additionally through special plugins in some other apps (Eclipse), but I got so used to C-f-ing through text and never having to jump to arrows that I'd like to be able to do this system-wide so that I can do it whenever I'm typing - e.g. searching for songs in Rhythmbox, typing stuff into the dash or the HUD, writing mails in Thunderbird or Gmail... The combos I'm most interested in are: C-f - forward C-b - backwards C-a - home C-e - end C-d - delete C-k - delete line (note for non-emacs users - C means Ctrl)

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• What is the current state of apple device (iPhone, iPod, etc.) support?

  - by BullfrogBlues

  What ubuntu applications provide support? (guides, how to's, status) Also, specifically, details on support for syncing music to iPhone's and iPod's with the latest OS version, as of writing iOS 5: Can you sync music to apple devices using iOS5? (iPhone & iPod) What applications allow you to do this and how? (guides, how to's, status) What has already been established is: Apple does not support Linux and has no plans to. libimobiledevice seems to provide some support but does not support syncing music with devices using iOS5. (I can't test libmobiledevice with anything other iOS5, so I can't provide details on how that works)

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• Your favorite LiveCD

  - by sova

  Perhaps this is a question better suited for linux.se but since I have servers on all environments I was wondering what your favorite LiveCD is. Wiki defines this, for those unfamiliar, as a CD or DVD containing a bootable computer operating system. Live CDs are unique in that they have the ability to run a complete, modern operating system on a computer lacking mutable secondary storage, such as a hard disk drive. Live USB flash drives are similar to live CDs, but often have the added functionality of automatically and transparently writing changes back to their bootable medium. I tend to stick with Knoppix, and today I have to register the machine on the network before I can get any of my utilities running via IP. Any suggestions?

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• Moving from an IT department to a proper technology company

  - by user2434

  I have been working with Java/web applications in an IT department of a retail company. As much as work goes, there is nothing much to say. Fixing couple of if/else loops, writing some simple business logic etc., is all what I have been doing. Having said that, I feel I have a good technical knowledge, and I am willing to move to companies like Microsoft/Google/Amazon etc., [I want to work in these places, because I feel I am a technical guy, and I am working in a place where most people freak out when the words like 'algorithm' are heard] I can of course prepare algorithms/computer science fundamentals etc.,(I hold a 4 year degree in computer science program) but beyond that, will my experience hold against me ? I doubt I'll even get a call from them seeing my work experience. What kind of questions(apart from the algorithm types) can I expect ?

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• Legality of modifying and distributing the JRE

  - by herpylderp

  I see that Google App Engine apps run on a so-called secured sandbox JRE; that is, a JRE that Google modified and that makes changes to certain JRE types. This is how GAE prevents developers from writing apps that can do things like: Access the local file system via File Make remote JDBC calls Use JNDI Lots of other restrictions We have a similar need where we have an app that developers will be able to write plugins for. These plugins will need to utilize an API (a JAR) that we distribute with our app. We cannot afford for plugins to do certain things, particularly on the end user's file system, and need to modify the File class in a similar manner that GAE does. Long back-story short, this means we'll need to ship our app with a custom, modified JRE. My question: is this legal to do, or did Google likely pay Oracle some fee to modify/distribute their own JRE for app engine?

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• Is it a bad practice to have an interface to define constants?

  - by FabianB

  I am writing a set of junit test classes in java. There are several constants, for example strings that I will need in different test classes. I am thinking about an interface that defines them and every test class would implement it. The benefits I see there are: easy access to constants: "MY_CONSTANT" instead of "ThatClass.MY_CONSTANT" each constant defined only once Is this approach rather a good or bad practice? I feel like abusing the concept of interfaces a little bit. You can answer generally about interfaces/constants, but also about unit tests if there is something special about it.

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• Resolving equivalence relations

  - by Luca Cerone

  I am writing a function to label the connected component in an image (I know there are several libraries outside, I just wanted to play with the algorithm). To do this I label the connected regions with different labels and create an equivalence table that contain information on the labels belonging to the same connected component. As an example if my equivalence table (vector of vector) looks something like: 1: 1,3 2: 2,3 3: 1,2,3 4: 4 It means that in the image there are 2 different regions, one made of elements that are labelled 1,2,3 and an other made of elements labelled 4. What is an easy and efficient way to resolve the equivalences and end up with something that looks like: 1: 1,2,3 2: 4 that I can use to "merge" the different connected regions belonging to the same connected component? Thanks a lot for the help!

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• juju: How do I list all the relation variables and debug them interactively?

  - by mfisch

  I'm writing a charm that requires a mysql database, I found from looking at other charms that this (below) is how I get the info about the database: user=`relation-get user` password=`relation-get password` mysqlhost=`relation-get private-address` But I just found that from reading the wordpress charm example, is there a way to show all the relation variables that I can use? Also, while debugging my db-relation-changed script, I wanted to ssh into my host and interactively run those commands, for example relation-get user, but it didn't work. I resorted to having to restart everything and use juju log to print them out. This wasted a lot of time. Is there a way to print out these relations, either from my dev box or from the instance running my charm? (Below is what happens when I tried to interactively run relation-get): ubuntu@mfisch-local-tracks-0:~$ relation-get user usage: relation-get [-h] [-o OUTPUT] [-s SOCKET] [--client-id CLIENT_ID] [--format FORMAT] [--log-file FILE] [--log-level CRITICAL|DEBUG|INFO|ERROR|WARNING] [-r RELATION ID] [settings_name] [unit_name] No JUJU_AGENT_SOCKET/-s option found

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• How do you balance between "do it right" and "do it ASAP" in your daily work?

  - by Flot2011

  I find myself pondering this question times and times again. I want to do things the right way, to write a clean, understandable, correct code that is easy to maintain, but what I really do pretty often is writing a patch upon patch just because there is no time, clients are waiting, a bug should be fixed overnight, the company is losing money on this problem, a manager is pressing hard etc. etc. I know perfectly well that in a long shot I am wasting much more time on these patches, but as this time is spread over months of work, nobody cares. Also, as one of my managers used to say, we don't know if there will be this long shot if we will not fix it now. I am sure I am not the only one entrapped in this endless real/ideal choices. So how you, fellow programmers, are coping with this?

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• When to Use workflow engines?

  - by A01_

  I'm totally new to this concept from design perspective. I've worked in past on some of the workflow engines as programmer but never had a clarity on why we chose the work-flow engines in first place. And as programmer I know that there are at least 100 ways to do anything when you are writing code but only few of the ways are the best! I still don't understand which use cases are best solved by workflow engines (or rather their concept) than designing a good DI enabled application. I'm looking for any general characteristics of domain-neutral use cases, where work-flow engines are one of the the best options. So my question is: What are general characteristics of a requirement which can be taken as a signal for opting for a good workflow engine and coding around it? Cheers!

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• Yet another Java EE 6 book

  - by alexismp

  We have a new Java EE 6 book in store! This one from Packt Publishing is called "Java EE 6 Development with NetBeans 7" by David Heffelfinger who is also author of Java EE 5 and GlassFish books. This book holds a step-by-step book documention all of the Java EE 6 features and APIs (including CDI) using the IDE with the best Java EE out-of-the-box experience : NetBeans 7. It uses GlassFish as the default container and PrimeFaces as a JSF component suite. We've covered several Java EE and GlassFish books before and I can't help but think that given writing books never helped authors retire early, having so many good books on Java EE 6 says something about its success among developers.

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• How to properly code in Unity? [on hold]

  - by Vincent B.

  I'm fairly new to Unity (yet I touched it and made a few proto with it) and I'd like to know how I'm supposed to work with it. I'm student in programming so I'm used to C/C++ with SDL/SFML, writing code and only using Input/Graphics/Network libs. I followed a few Unity guides and it was way more around drag & drop on scenes and a bit of scripting to activate it all, which disturbed me. So I fond a way to only use one GameObject and use a Singleton to launch code and display stuff (for 2d games at least). At the end of the day I make games not using "Instantiate" or such at all. Is it the right way ? Am I supposed to do this ? How much are your scenes populated (in a professional environment) ? When should I stop coding and start using the editor ?

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• background animation algorithm for single screen

  - by becool_max

  I’m writing simple strategy game (in xna), and would like to have an animated background. In my game all the actions happens inside one screen and thus standard parallax effect does not look appropriate. However, I found a video of a game with suitable background animation for my game http://www.youtube.com/watch?v=Vcxdbjulf90&feature=share&list=PLEEF9ABAB913946E6 (from 3 to 6s, while main character stays at the same place). What is the algorithm to do this stuff? It would be nice if someone can provide a reference for a similar example (language is not important).

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• How do I render an entire frame to a Texture2D?

  - by redcodefinal

  I asked a question here: C# XNA Make rendered screen a texture2d But, I ended up not getting the exact result I was looking for since I didn't ask the question right. In a game I am writing, I render an extremely large city out of objects, this can cause lag when moving the camera to view things that are off screen. I need a way to render then ENTIRE city, even the stuff that is off screen, and make it into a Texture2D. The answer I chose for the last one didn't work entirely right because it only gets what is on screen, not what is off.

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• A relatively new blog seems to be getting very poor Google indexing

  - by Genadinik

  I have a new blog that is 2 months old. In the first few weeks, it was getting indexed nicely and my GoogleWebmaster reports were showing that it was getting crawled and began ranking for some terms. Then as I kept writing, the GoogleWebmaster report thinned out and showed less and less terms that this blog ranks for. Now there are only 4 terms with one of them being my name. Is there something I need to do to keep the old posts to remain indexed and crawled? Thanks, Alex

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• Should single purpose utility app use a class

  - by jmoreno

  When writing a small utility app, that does just one thing, should that one thing be encapsulated in a seperate class, or just let it be part of whatever class/module is used to start the application? I.e. Main would consist of 2 or three lines calling the constructor and then the DoIt methods, nothing else. Or should Main be the DoIt method, with whatever functions it needs added to the main class? Asking because I want to get some alternative perspective, but couldn't find a similar question. If my google-fu is bad and there's a dup, please close.

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• How can I effectively use a netbook and a desktop computer together for programming?

  - by Mana

  Currently, in my workspace, I have a netbook sitting off to the side gathering dust while I write code on my desktop. As a result, the only use my netbook gets coding-wise is when I'm writing up a quick Python script to model a given problem or concept in class; I never use it at home for coding, or for anything at all, as it is all possible and faster on my (much more powerful) desktop. I feel like this is wrong and that I should be making better use of my netbook. What effective uses have you found for a netbook and a desktop together when programming (or for software development in general)? What are the merits of this practice?

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• GlassFish Downloads - Where? (reminder)

  - by alexismp

  Whether you're looking for the open source edition, stable and supported builds, promoted or event nightly builds, they are all in one place on this download page which is linked off of the main glassfish.org welcome page. At the time of this writing (Nov. 2011), the latest stable release is GlassFish 3.1.1 (open source bits, supported Oracle GlassFish Server). The all-in-one Download page also contains links to the developer builds of both 3.1.2 (see plans here) as well as the promoted builds for the 4.0 version (plans) which was used to deliver the keynote "PaaS" demo at the recent JavaOne and Devoxx conferences.

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• How compilers know about other classes and their properties?

  - by OnResolve

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

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• Rotate an object given only by its points?

  - by d33tah

  I was recently writing a simple 3D maze FPP game. Once I was done fiddling with planes in OpenGL, I wanted to add support for importing Blender objects. The approach I used was triangulization of the object, then using Three.js to export the points to plaintext and then parsing the result JSON in my app. The example file can be seen here: https://github.com/d33tah/tinyfpp/blob/master/Data/Models/cross.txt The numbers represent x,y,z,u,v of a single vertex, which combined in three make a triangle. Then I rendered such an object triangle-by-triangle and played with it. I could move it back and forth and sideways, but I still have no idea how to rotate it by some axis. Let's say I'd like to rotate all the points by five degrees to the left, how would a code doing it look like?

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• update(100) behaves slightly different than 10 times update(10) - is that a problem? [on hold]

  - by futlib

  While looking into some test failures, I've identified an curious issue with my update logic. This: game.update(100); Behaves slightly different from: for (int i = 0; i < 10; i++) game.update(10); The concrete example here is a rotating entity. It rotates by exactly 360 degrees in the first case, but only by about 352 in the second. This leads to slight variations in how things move, depending on the frame rate. Not enough to be noticeable in practice, but I did notice it when writing tests. Now my question is: Should this be fully deterministic, i.e. the outcome of update(1) * n should equal update(n) exactly? Or is it normal to have some variance and I should make my test assertions more generous?

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