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  • Google I/O 2012 - SQL vs NoSQL: Battle of the Backends

    Google I/O 2012 - SQL vs NoSQL: Battle of the Backends Ken Ashcraft, Alfred Fuller Google App Engine now offers both SQL and NoSQL data storage -- but which is right for your application? Advocates of each try to settle the issue once and for all, and show some of the tricks for getting the most out of each. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 2394 38 ratings Time: 43:09 More in Science & Technology

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  • 2011 Tech Goal Review

    - by kerry
    A year ago I wrote a post listing my professional goals for 2011.  I thought I would review them and see how I did. Release an Android app to the marketplace – Didn’t do it.  In fact, haven’t really touched Android much since I wrote that.  I still have some ideas but am not sure if I will get around to it. Contribute free software to the community – I did do this.  I have been collaborating with others via github more lately. Regularly attend a user group meetings outside of Java – Did not do this.  Family life being what it is makes this not that much of a priority right now. Obtain the Oracle Certified Web Developer Certification – Did not do this.  This is not much of a priority to me any more. Learn scala – I am about 50/50 on this one.  I read a few scala books but did not write an actual application. Write an app using JSF – Did not do this.  Still interested. Present at a user group meeting – I did a Maven presentation at the Java user group. Use git more, and more effectively – Definitely did this.  Using it on a daily basis now. Overall, I got about halfway on my goals.  It’s not too bad since I did do a few things that weren’t on my list. Learned to develop applications using GWT and deploy them to Google App Engine Converted one of my sites from PHP to Ruby / Sinatra (learning to use it in the process) Studied up on the HTML 5 features and did a lot of Javascript development

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  • Dartisans ep 12 - Dart + Web Components

    Dartisans ep 12 - Dart + Web Components Web Components are ushering in the "declarative renaissance" for modern web development. Watch this episode of Dartisans to learn how you can build Web Components with Dart, and compile them into JavaScript to run across the modern web. Learn more about Dart at www.dartlang.org From: GoogleDevelopers Views: 2 0 ratings Time: 46:17 More in Science & Technology

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  • Should I use JavaFx properties?

    - by Mike G
    I'm usually very careful to keep my Model, View, and Controller code separate. The thing is JavaFx properties are so convenient to bind them all together. The issue is that it makes my entire code design dependent on JavaFx, which I feel I should not being doing. I should be able to change the view without changing too much of the model and controller. So should I ignore the convenience of JavaFx properties, or should I embrace them and the fact that it reduces my codes flexibility.

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  • GDL Presents: All the Web's a Stage

    GDL Presents: All the Web's a Stage All the Web's a Stage: Building a 3D Space in the Browser Thursday, October 11 - 10:30AM PDT Meet the designers and creative team behind a new sensory Chrome experiment, Movi.Kanti.Revo, in a live, design-focused Q&A. Learn how Cirque du Soleil and Subatomic Systems worked to translate the wonder of Cirque into an environment built entirely with markup and CSS. Host: Pete LePage, Developer Advocate Guests: Gillian Ferrabee, Cirque du Soleil | Nicole McDonald, Director/Creative Director, Subatomic Systems From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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  • Google I/O 2012 - Writing Efficient Drive Apps for Android

    Google I/O 2012 - Writing Efficient Drive Apps for Android Alain Vongsouvanh, Claudio Cherubino This session goes through how to write Drive apps that synchronize files with Android devices. We'll also go into how to open files on Android devices, or create new files from this environment. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 234 5 ratings Time: 52:45 More in Science & Technology

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  • Life, Identity, and Everything

    Life, Identity, and Everything Tim Bray is the Developer Advocate, and Breno de Madeiros is the tech lead, in the group at Google that does authentication and authorization APIs; specifically, those involving OAuth and OpenID. Breno also has his name on the front of a few of the OAuth RFCs. We're going to talk for a VERY few (less than 10) minutes on why OAuth is a good idea, and a couple of things we're working on right now to help do away with passwords. After that, ask us anything. From: GoogleDevelopers Views: 0 0 ratings Time: 30:00 More in Science & Technology

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  • Google I/O 2012 - How to Build Apps that Love Each Other with Web Intents

    Google I/O 2012 - How to Build Apps that Love Each Other with Web Intents Paul Kinlan, James Hawkins Web Intents allows you to build applications that integrate with one another with an ease that has never been seen on the web before. In this session we will show you how to connect applications using Web Intents and how to best integrate with the many actions available in Web Intents such as editing, saving and sharing. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 1394 15 ratings Time: 57:48 More in Science & Technology

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  • Google I/O 2012 - A Master Class in Map Styling

    Google I/O 2012 - A Master Class in Map Styling Scott Shawcroft, Jonah Jones Custom Styled Maps allow developers to customize the look and feel of the underlying Google Maps tiles. This makes it really easy to make a great looking map. You can tailor your map to your message, to your color scheme, or to help emphasize your data. In this class, master maps designers will help you build beautiful, elegant styles that make your maps work for you. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 23 0 ratings Time: 38:21 More in Science & Technology

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  • Google I/O 2012 - YouTube API + Cloud Rendering = Happy Mobile Gamers

    Google I/O 2012 - YouTube API + Cloud Rendering = Happy Mobile Gamers Jarek Wilkiewicz, Danny Hermes YouTube is one of the top destinations for gamers. Many console developers already incorporate video recording and uploading directly into their titles, but uploading to YouTube from a mobile game presents a unique set of challenges. Come and learn how the YouTube API combined with cloud computing can help enable video uploads in your mobile game. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 100 0 ratings Time: 57:05 More in Science & Technology

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  • parallel_for_each from amp.h – part 1

    - by Daniel Moth
    This posts assumes that you've read my other C++ AMP posts on index<N> and extent<N>, as well as about the restrict modifier. It also assumes you are familiar with C++ lambdas (if not, follow my links to C++ documentation). Basic structure and parameters Now we are ready for part 1 of the description of the new overload for the concurrency::parallel_for_each function. The basic new parallel_for_each method signature returns void and accepts two parameters: a grid<N> (think of it as an alias to extent) a restrict(direct3d) lambda, whose signature is such that it returns void and accepts an index of the same rank as the grid So it looks something like this (with generous returns for more palatable formatting) assuming we are dealing with a 2-dimensional space: // some_code_A parallel_for_each( g, // g is of type grid<2> [ ](index<2> idx) restrict(direct3d) { // kernel code } ); // some_code_B The parallel_for_each will execute the body of the lambda (which must have the restrict modifier), on the GPU. We also call the lambda body the "kernel". The kernel will be executed multiple times, once per scheduled GPU thread. The only difference in each execution is the value of the index object (aka as the GPU thread ID in this context) that gets passed to your kernel code. The number of GPU threads (and the values of each index) is determined by the grid object you pass, as described next. You know that grid is simply a wrapper on extent. In this context, one way to think about it is that the extent generates a number of index objects. So for the example above, if your grid was setup by some_code_A as follows: extent<2> e(2,3); grid<2> g(e); ...then given that: e.size()==6, e[0]==2, and e[1]=3 ...the six index<2> objects it generates (and hence the values that your lambda would receive) are:    (0,0) (1,0) (0,1) (1,1) (0,2) (1,2) So what the above means is that the lambda body with the algorithm that you wrote will get executed 6 times and the index<2> object you receive each time will have one of the values just listed above (of course, each one will only appear once, the order is indeterminate, and they are likely to call your code at the same exact time). Obviously, in real GPU programming, you'd typically be scheduling thousands if not millions of threads, not just 6. If you've been following along you should be thinking: "that is all fine and makes sense, but what can I do in the kernel since I passed nothing else meaningful to it, and it is not returning any values out to me?" Passing data in and out It is a good question, and in data parallel algorithms indeed you typically want to pass some data in, perform some operation, and then typically return some results out. The way you pass data into the kernel, is by capturing variables in the lambda (again, if you are not familiar with them, follow the links about C++ lambdas), and the way you use data after the kernel is done executing is simply by using those same variables. In the example above, the lambda was written in a fairly useless way with an empty capture list: [ ](index<2> idx) restrict(direct3d), where the empty square brackets means that no variables were captured. If instead I write it like this [&](index<2> idx) restrict(direct3d), then all variables in the some_code_A region are made available to the lambda by reference, but as soon as I try to use any of those variables in the lambda, I will receive a compiler error. This has to do with one of the direct3d restrictions, where only one type can be capture by reference: objects of the new concurrency::array class that I'll introduce in the next post (suffice for now to think of it as a container of data). If I write the lambda line like this [=](index<2> idx) restrict(direct3d), all variables in the some_code_A region are made available to the lambda by value. This works for some types (e.g. an integer), but not for all, as per the restrictions for direct3d. In particular, no useful data classes work except for one new type we introduce with C++ AMP: objects of the new concurrency::array_view class, that I'll introduce in the post after next. Also note that if you capture some variable by value, you could use it as input to your algorithm, but you wouldn’t be able to observe changes to it after the parallel_for_each call (e.g. in some_code_B region since it was passed by value) – the exception to this rule is the array_view since (as we'll see in a future post) it is a wrapper for data, not a container. Finally, for completeness, you can write your lambda, e.g. like this [av, &ar](index<2> idx) restrict(direct3d) where av is a variable of type array_view and ar is a variable of type array - the point being you can be very specific about what variables you capture and how. So it looks like from a large data perspective you can only capture array and array_view objects in the lambda (that is how you pass data to your kernel) and then use the many threads that call your code (each with a unique index) to perform some operation. You can also capture some limited types by value, as input only. When the last thread completes execution of your lambda, the data in the array_view or array are ready to be used in the some_code_B region. We'll talk more about all this in future posts… (a)synchronous Please note that the parallel_for_each executes as if synchronous to the calling code, but in reality, it is asynchronous. I.e. once the parallel_for_each call is made and the kernel has been passed to the runtime, the some_code_B region continues to execute immediately by the CPU thread, while in parallel the kernel is executed by the GPU threads. However, if you try to access the (array or array_view) data that you captured in the lambda in the some_code_B region, your code will block until the results become available. Hence the correct statement: the parallel_for_each is as-if synchronous in terms of visible side-effects, but asynchronous in reality.   That's all for now, we'll revisit the parallel_for_each description, once we introduce properly array and array_view – coming next. Comments about this post by Daniel Moth welcome at the original blog.

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  • Google I/O 2012 - Android Design for Success

    Google I/O 2012 - Android Design for Success Rachel Garb, Jens Nagel, Nate Streu, Matias Duarte You have a great idea for an Android app. You want it to stand out among hundreds of thousands. You want your users to love it and tell everyone they know. The Android User Experience team is here to help. We'll talk about the Android Design guide and other tricks of the trade for creating apps that delight users and help them accomplish their goals. No design background is required. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 46 5 ratings Time: 01:03:04 More in Science & Technology

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