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• Google I/O 2010 - A JIT Compiler for Android's Dalvik VM

  Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Google I/O 2010 - A JIT Compiler for Android's Dalvik VM Android 301 Ben Cheng, Bill Buzbee In this session we will outline the design of a JIT Compiler suitable for embedded Android devices. Topics will include an architectural overview, the rationale for design decisions and the special support for JIT verification, testing and tuning. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 3 0 ratings Time: 01:00:14 More in Science & Technology

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• REAL PRACTICES: Performance Scaling Microsoft SQL Server 2008 Analysis Services at Microsoft adCenter

  This white paper explains how Microsoft® adCenter implemented a Microsoft SQL Server® 2008 Analysis Services Scalable Shared Database on EMC® Symmetrix VMAX™ storage. Leveraging TimeFinder® clones and Enterprise Flash Drives with the read-only feature of SQL Server 2008 Analysis Services allowed adCenter to dramatically scale out OLAP while maintaining SLAs and decreasing system outages.

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• Examples of "Lost art" on software technology/development

  - by mamcx

  With the advent of a new technology, some old ideas - despite been good - are forgotten in the process. I read a lot how some "new" thing was already present in Lisp like 60 years ago, but only recently resurface with other name or on top of another language. Now look like the new old thing is build functional, non-mutable, non-locking-thread stuff... and that make me wonder what have been "lost" in the art of development of software? What ideas are almost forgotten, waiting for resurface? One of my, I remember when I code in foxpro. The idea of have a full stack to develop database apps without impedance mismatch is something I truly miss. In the current languages, I never find another environment that match how easy was develop in fox back them. What else is missing?

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• Parallel.For Inconsistency results

  - by ni Gue ???

  I am using VB.net to write a parallel based code. I use Parallel.For to generate pairs of 500 objects or in combination C(500,2) such as the following code; but I found that it didn't always generate all combinations which should be 124750 (shown from variable Counter). No other thread was runing when this code was run. I am using a Win-7 32 Bit desktop with Intel Core i5 CPU [email protected], 3.33 GHz and RAM 2GB. What's wrong with the code and how to solve this problem? Thank You. Dim Counter As Integer = 0 Parallel.For(0, 499, Sub(i) For j As Integer = i + 1 To 499 Counter += 1 Console.Write(i & ":" & j) Next End Sub) Console.Writeline("Iteration number: " & Counter)

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• Composing programs from small simple pieces: OOP vs Functional Programming

  - by Jay Godse

  I started programming when imperative programming languages such as C were virtually the only game in town for paid gigs. I'm not a computer scientist by training so I was only exposed to Assembler and Pascal in school, and not Lisp or Prolog. Over the 1990s, Object-Oriented Programming (OOP) became more popular because one of the marketing memes for OOP was that complex programs could be composed of loosely coupled but well-defined, well-tested, cohesive, and reusable classes and objects. And in many cases that is quite true. Once I learned object-oriented programming my C programs became better because I structured them more like classes and objects. In the last few years (2008-2014) I have programmed in Ruby, an OOP language. However, Ruby has many functional programming (FP) features such as lambdas and procs, which enable a different style of programming using recursion, currying, lazy evaluation and the like. (Through ignorance I am at a loss to explain why these techniques are so great). Very recently, I have written code to use methods from the Ruby Enumerable library, such as map(), reduce(), and select(). Apparently this is a functional style of programming. I have found that using these methods significantly reduce code volume, and make my code easier to debug. Upon reading more about FP, one of the marketing claims made by advocates is that FP enables developers to compose programs out of small well-defined, well-tested, and reusable functions, which leads to less buggy code, and low code volume. QUESTIONS: Is the composition of complex program by using FP techniques contradictory to or complementary to composition of a complex program by using OOP techniques? In which situations is OOP more effective, and when is FP more effective? Is it possible to use both techniques in the same complex program? Do the techniques overlap or contradict each other?

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• Regardig Vb.net [closed]

  - by user68999

  hi everyone i am making a project for school management and manage all the record of student so I'm using VB.net 2008 and sql server 2008. i have a problem when i enter student date of birth in text box with date&time picker in database. but i want in the search option enter the date from date&time picker and get age of all the student data in data-view grid. like student are 10 year old, 11 year old etc. so how it can possible please help..........?

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• Location of development solutions on disk - Common or upto the individual

  - by dreza

  In our team meeting today a senior member brought up the proposal that we should be having a common location/structure for our development solutions. A couple of his points were: Making it common meant when talking about projects and emailing stuff everyone is on the same wavelength and knows where to look. If there is ever the need to hard code a location path then it will work across all developers pc's. He had a more few points to back up his suggestion but I unfortunately got distracted during the discussion and so didn't hear all of them. I have no issue with the idea and can see it's merits but I was wondering if it is common or even recommended that all developers place their code in the same folder structure. Or do developers like to have the flexibility of location solutions where-ever they want? We currently use SVN for our version control. In this case his recommendation was to place all code in: c:\Work\Development\<Customer>\<project>\Code\<solution>\ the code I guess actual path is irrelevant for this question but added for completeness.

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• What are the problems with a relatively large common library?

  - by Sam Pearson

  As long as the code in the base library is as loosely coupled as splitting it up into separate libraries, what's the problem? In general, having a lot of assemblies composing a .NET solution is painful. Plus, when code in one solution needs to be shared, it can just be added to the common library, rather than deciding which common library it should be added to or creating yet another library. edit: the question comes to me after using Smalltalk for a bit, where all the code is available to use, all the time.

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• Intellectual-Property Question

  - by Roger J. J.

  Like almost everyone here, I have a handfull of scripts and software that I have developed and am enthused about. I will be looking for my first job as a software designer / coder. It seems natural that I will be eager to please my employer and use scripts or similar methods that I have developed and worked for me in the past to please my employer. It seems certain that many things that I code will look very similar to things I have coded in the past. I don't understand how to document and articulate to an employer that this code base was mine before I got here and this will continue to be mine when I leave. Surely, this is a common issue, but none of the various searches I've done on the net have produced an answer to this question. How is this situation commonly dealt with in the industry? I feel like there should be a digital version of sending myself a 'certified letter' with my code/software/scripts contained. I'm not trying to protect my code from others using it; I am trying to protect my right to continue using my code base that I have developed prior to to gaining employment with an employer.

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• Is there ever a reason to do all an object's work in a constructor?

  - by Kane

  Let me preface this by saying this is not my code nor my coworkers' code. Years ago when our company was smaller, we had some projects we needed done that we did not have the capacity for, so they were outsourced. Now, I have nothing against outsourcing or contractors in general, but the codebase they produced is a mass of WTFs. That being said, it does (mostly) work, so I suppose it's in the top 10% of outsourced projects I've seen. As our company has grown, we've tried to take more of our development in house. This particular project landed in my lap so I've been going over it, cleaning it up, adding tests, etc etc. There's one pattern I see repeated a lot and it seems so mindblowingly awful that I wondered if maybe there is a reason and I just don't see it. The pattern is an object with no public methods or members, just a public constructor that does all the work of the object. For example, (the code is in Java, if that matters, but I hope this to be a more general question): public class Foo { private int bar; private String baz; public Foo(File f) { execute(f); } private void execute(File f) { // FTP the file to some hardcoded location, // or parse the file and commit to the database, or whatever } } If you're wondering, this type of code is often called in the following manner: for(File f : someListOfFiles) { new Foo(f); } Now, I was taught long ago that instantiated objects in a loop is generally a bad idea, and that constructors should do a minimum of work. Looking at this code it looks like it would be better to drop the constructor and make execute a public static method. I did ask the contractor why it was done this way, and the response I got was "We can change it if you want". Which was not really helpful. Anyway, is there ever a reason to do something like this, in any programming language, or is this just another submission to the Daily WTF?

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• How to design a separated tutorial mode?

  - by Sylpheed

  I'm working on a "social" game that's about 90% completion. One of the remaining features is the tutorial mode. Basically, the tutorial mode will restrict the user to access some parts of UI and limit the features (like store items). The tutorial will only progress if a certain event is triggered, specifically following the tutorial. The code is ready and we already have an "almost" working game. The problem is I haven't foreseen the tutorial mode while I was doing those 90%. My requirement is there shouldn't be any loading/transition from tutorial mode to normal mode. This means I have to pick up the progress from the tutorial (no re-rendering of assets and stuff). How should I design this in a way where I won't touch anything from my old code? I want it to be as easy as just plugging it in. I don't want to jam the tutorial in my old code since this will lead to many bugs.

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• CCUserDefault, iOS/Android and game updates

  - by Luke

  My game uses cocos2d-x and will be published on iOS platform first, later on Android. I save a lot of things with CCUserDefault (scores, which level was completed, number of coins taken, etc...). But now I have a big doubt. What will happen when the game will receive its first update? CCUserDefault uses an XML file stored somewhere in the app storage space. This file is created and retained until one uninstalls the app. I am wondering what happens when the app is updated. Will the old XML file be maintained? Because if not, how should I handle app updates (updates in the sense that 2, 3 or more new level packages will be added, but the informations about the old ones, like scores, which level was finished and which not, number of coins, etc., need absolutely not to be lost)?

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• Linking Libraries in iOS?

  - by Bob Dole

  This is probably a totally noob question but I have missing links in my mind when thinking about linking libraries in iOS. I usually just add a new library that's been cross compiled and set the build and linker paths without really know what I'm doing. I'm hoping someone can help me fill in some gaps. Let's take the OpenCV library for instance. I have this totally working btw because of a really well written tutorial( http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en ), but I'm just wanting to know what is exactly going on. What I'm thinking is happening is that when I build OpenCV for iOS is that your creating object code that gets placed in the .a files. This object code is just the implementation files( .m ) compiled. One reason you would want to do this is to make it hard to see the source code and so that you don't have to compile that source code every time. The .h files won't be put in the library ( .a ). You include the .h in your source files and these header files communicate with the object code library ( .a ) in some way. You also have to include the header files for your library in the Build Path and the Library itself in the Linker Path. So, is the way I view linking libraries correct? If , not can someone correct me on this ?

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• Google I/O Sandbox Case Study: Box

  Google I/O Sandbox Case Study: Box We interviewed Box at the Google I/O Sandbox on May 11, 2011. They explained to us the benefits of integrating with the Chrome OS system. Box offers cloud-based content management for businesses and they recently unveiled a streamlined content upload process on the Chrome OS. For more information about developing on Chrome, visit: code.google.com For more information on Box, visit: www.box.net From: GoogleDevelopers Views: 20 0 ratings Time: 01:47 More in Science & Technology

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• Welcome to my blog!

  - by Thomas Mason

  I am a 21 year old Web Developer, with over five years experience in the PHP field. Covering Javascript - jQuery & Ajax, mySQL, JSON and CSS. Out of the five years experience, three have been as a freelancer, the rest commercial work. (I have to say freelance is more comfortable whereas commercial really does get you to do things out of the box.) This blog will cover problems I come across and the solutions I came up with. Bringing ideas into reality - even if it's never been done before! Overall I hope to bring new ideas and my experience to developers old and new.

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• How to Write Axis2 Web Service Clients for the Cloud

  In this article we are going to discuss how to use the Axis2 code generation tool to generate client side code that invokes the Amazon EC2 cloud APIs. We'll also look at how to set up that code to invoke a remote service.

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• Offline apt-get update to age of cache

  - by James Haigh

  I have a script to quickly upgrade a Live or fresh system from cached files on a flash drive. In essence, it looks like this: # *Code to remove and symlink /var/cache/apt/ if currently empty of packages.* sudo apt-get dist-upgrade # Quick offline cached upgrade; not limited by slow WANs. echo $'\nMake sure Internet is reachable and press enter for complete online upgrade.'; read sudo apt-get update sudo apt-get dist-upgrade # Complete online upgrade. The problem is that the ‘cached upgrade’ seems to ignore the cached pkgcache.bin and srcpkgcache.bin which is where I assume apt-get update stores its changes, so the upgrade completes as if the system is up-to-date. Useless. So in that case, I need some code to apt-get update to the age of the package cache on my flash drive. This code would be placed between the 1st and 2nd lines of the code above.

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• I want to consolidate two sites into a third. Will my search engine rankings be penalized if I rewrite and redirect pages one by one?

  - by Patrick Kenny

  I have two Drupal sites with different content-- let's call them Apple and Orange. I recently developed a much more sophisticated third Drupal site-- let's call it Tree. For a large number of reasons, the content on Apple and Orange is useful for the users of Tree, so I want to move the content to Tree. However, much of the content is out of date. (This whole process took about five years.) To update the content, I will rewrite it one article at a time myself. Now here's my question: if I move the articles one by one (as I rewrite them) and then redirect the old articles (using a 301 redirect) on Apple/Orange to the new site on Tree, will this have a huge negative effect on my search engine rankings? Is there a good way to redirect among sites when they merge like this, or would I be better off keeping the old articles on Apple/Orange and simply linking them to the new, rewritten articles on Tree?

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• Google I/O Sandbox Case Study: WebFilings

  Google I/O Sandbox Case Study: WebFilings We interviewed WebFilings at the Google I/O Sandbox on May 10, 2011 and they explained to us the benefits of using App Engine to build their website. WebFilings provides a secure, cloud-based end-to-end financial reporting solution for SEC reporting companies. For more information on App Engine Developers, visit: code.google.com For more information on WebFilings, visit: www.webfilings.com From: GoogleDevelopers Views: 29 1 ratings Time: 02:31 More in Science & Technology

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• OpenGL behaviour depending on the graphics card?

  - by Dan

  This is something that never happened to me before. I have an OpenGL code that uses GLSL shaders to texture a 3D model. The code involves a lot of GPU texture processing, blending, etc... I wanted to check how the performance of my code improves using a faster graphics card (both new and old are NVIDIA, using always the NVIDIA development drivers). But now I have found that once I run the code using the new graphics card, it behaves completely different (the final render looks wrong), probably because some blending effect is not performed correctly. I haven't really look into what has changed, but I am guessing that some OpenGL states are, by default, set different. Is this possible? Have you ever found different OpenGL/GLSL behaviour using different graphics cards? Any "fast" solution? (So far I've thought of plugging back the old one, push all OpenGL default states, and compare with the ones I initially get using the new card..)

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• Can't get into the admin console after migrating to new server

  - by Emerson

  I migrated my WordPress blog to a new server, and everything seemed to be working fine until it started giving me the error when entering the admin area: Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 4864 bytes) in /home/neworder/public_html/blog/wp-admin/includes/plugin.php on line 729 The line 729 has: $protected = array( '_wp_attached_file', '_wp_attachment_metadata', '_wp_old_slug', '_wp_page_template' ); I had installed the maintenance-mode, and I have suspicions that this is what broke the forum. If I remove the plugin it then gives another error: Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 19456 bytes) in /home/neworder/public_html/blog/wp-admin/includes/post.php on line 1158 And that line has: $content .= '<p class="hide-if-no-js">' . esc_html__( 'Remove featured image' ) . '</p>'; } I tried to restore the blog file-system from the old server and also to restore the database from the old server (2x), but still it gives me the same error. The blog itself seems to be working fine: http://blog.antinovaordemmundial.com/

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• Migrating Ruby on Rails Website to New Server (Linux)

  - by GarytheWorm

  I have an existing website that is a Ruby on Rails project. I have another server i need to transfer the existing website too. The server i wish to transfer too was originally hosting the website so has the necessary gems/configuration are installed. I have tar the current releases shared dir from the old server and transfered them over to the new server. I have then unpack the tar in the apps directory to the new location which is a different URL path. My problem is now as you can see below that the path on the current - is pointing to the old url. ( i ran ls -la to see owenership) How can i change this current path to read with my new web address? current releases shared sitepack.tar root@server1:/var/www/clients/client1/NEWSITE.com/web/apps# ls -la current - /var/www/OLDSITE.com/web/apps/releases/20120130171636 root@server1:/var/www/clients/client1/NEWSITE.com/web/apps#

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• OpenSource license with commerial-use exemptions for the owner

  - by dbkk

  I'm looking for an open source license which grants me additional privileges. Features: Anyone can freely modify, fork, use the code, as long as they make their source changes publicly available. They can use it in other open source projects, but not in closed-source projects. Only I and entities I specifically designate can use the code as part of a closed-source application. I am also exempt from the duty to publish the source code changes. I'm not trying to forbid the commercial use, just to allow myself more flexibility to use the code, while still contributing to open source. I don't want to burn myself by being legally forbidden from using the libraries I wrote in my commercial projects. Large companies use such dual licenses to maintain an open source project, while also selling the premium version. Which licenses of this type are available? What caveats or obstacles exist?

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• Google Python Class Day 2 Part 4

  Google Python Class Day 2 Part 4 Google Python Class Day 1 Part 1: Closing Thoughts. By Nick Parlante. Support materials and exercises: code.google.com From: GoogleDevelopers Views: 129 1 ratings Time: 11:16 More in Science & Technology

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• Where to find Joomla components for 1.0.X?

  - by Matt Handy

  I need to add new functionality to an old Joomla 1.0.15 installation. To be concrete, I need to add a component that allows me to add custom javascript to my content. I know that there is the option to edit the html source of the content but I rather would like to use a module for this. So I see two options (correct me if there are more): Update Joomla to at least version 1.5 (From some forum posts I found out that can be somewhat complicated). I don't know if it is worth the effort since new functionality requirements come rarely (and I think my client doesn't want to pay for a Joomla version update). Find an appropriate component and leave the old installation as it is. Can anyone point me into the right direction?

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