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Articles indexed Monday June 7 2010

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  • Calculating spam probability

    - by Hobhouse
    I am building a website in python/django and want to predict wether a user submission is valid or wether it is spam. Users have an accept rate on their submissions, like this website has. Users can moderate other users' submissions; and these moderations are later metamoderated by an admin. Given this: user A with an submission accept rate of 60% submits something. user B moderates A's post as a valid submission. However, his moderations are often wrong, and his moderations' accept rate is a mere 30%. user C moderates A's post as spam. User C is usually right. His moderations' accept rate is 80%. How can I predict the chance of A's post being spam?

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  • Can I strictly evaluate a boolean expression stored as a string in Java?

    - by D Lawson
    I would like to be able to evaluate an boolean expression stored as a string, like the following: "hello" == "goodbye" && 100 < 101 I know that there are tons of questions like this on SO already, but I'm asking this one because I've tried the most common answer to this question, BeanShell, and it allows for the evaluation of statements like this one "hello" == 100 with no trouble at all. Does anyone know of a FOSS parser that throws errors for things like operand mismatch? Or is there a setting in BeanShell that will help me out? I've already tried Interpreter.setStrictJava(true). Here's the code that I'm using currently: Interpreter interpreter = new Interpreter(); interpreter.setStrictJava(true); String testableCondition = "100 == \"hello\""; try { interpreter.eval("boolean result = ("+ testableCondition + ")"); System.out.println("result: "+interpreter.get("result")); if(interpreter.get("result") == null){ throw new ValidationFailure("Result was null"); } } catch (EvalError e) { e.printStackTrace(); throw new ValidationFailure("Eval error while parsing the condition"); }

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  • How to move something from a virtual dpad on-screen

    - by Kriegalex
    Hello everyone, I've started a little game, and so far I'm moving a little guy with onKeyDown() and the DPAD from Android Emulator. Now what I want to do is to add 4 buttons on the screen (like in a GAMEBOY emulator for example) and these buttons should move my little guy. With a clickListener and onClick() (or touchListener and onTouch()), it's ok for one move but how to do if I want that my little guy continues moving when I stay clicked on the button ??? Buttons are enough or should I make a 4 arrows soft keyboard or anything else ?? Thanks

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  • Using VS Code Snippets with Resharper

    - by devoured elysium
    I am trying to use Code Contract's Code Snippets but since I turned Resharper back on it doesn't recognize them. On the other hand, it is recognizing some snippets I've implemented myself in the past. Any ideia of what might be the problem? I'm specifically trying to use cr and ce, which I think, don't collide with any other snippets (at least from what I see in the intellisense). I'm using R# 5 with VS 2010 Thanks

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  • Use external datasource with NUnit's TestCaseAttribute

    - by Hamman359
    Is it possible to get the values for a TestCaseAttribute from an external data source such as an Excel Spreadsheet, CSV file or Database? i.e. Have a .csv file with 1 row of data per test case and pass that data to NUnit one at a time. Here's the specific situation that I'd like to use this for. I'm currently merging some features from one system into another. This is pretty much just a copy and paste process from the old system into the new one. Unfortunately, the code being moved not only does not have any tests, but is not written in a testable manner (i.e. tightly coupled with the database and other code.) Taking the time to make the code testable isn't really possible since its a big mess, i'm on a tight schedule and the entire feature is scheduled to be re-written from the ground up in the next 6-9 months. However, since I don't like the idea of not having any tests around the code, I'm going to create some simple Selenium tests using WebDriver to test the page through the UI. While this is not ideal, it's better than nothing. The page in question has about 10 input values and about 20 values that I need to assert against after the calculations are completed, with about 30 valid combinations of values that I'd like to test. I already have the data in a spreadsheet so it'd be nice to simply be able to pull that out rather than having to re-type it all in Visual Studio.

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  • Google I/O 2010 - Google Wave Media APIs

    Google I/O 2010 - Google Wave Media APIs Google I/O 2010 - Google Wave Media APIs: Attachments can surf too! Wave 201 Seth Covitz, Jimin Li, Phil Liao Google Wave is used by diverse groups to communicate and collaborate on projects from work to school to plain old having fun. To make users even more productive, we are providing capabilities that enable them to collaborate on and around any piece of third-party content (eg attachments). In this session, we will introduce the Wave Media APIs which enable robots and gadgets to create, access, and modify third-party content in Wave. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 5 0 ratings Time: 41:04 More in Science & Technology

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  • Google I/O 2010 - Building your own Google Wave provider

    Google I/O 2010 - Building your own Google Wave provider Google I/O 2010 - Open source Google Wave: Building your own wave provider Wave 101 Dan Peterson, Jochen Bekmann, JD Zamfirescu Pereira, David LaPalomento (Novell) Learn how to build your own wave service. Google is open sourcing the lion's share of the code that went into creating Google Wave to help bootstrap a network of federated providers. This talk will discuss the state of the reference implementation: the software architecture, how you can plug it into your own use cases -- and how you can contribute to the code and definition of the underlying specification. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 8 0 ratings Time: 59:03 More in Science & Technology

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  • Google I/O 2010 - Google Wave API design principles

    Google I/O 2010 - Google Wave API design principles Google I/O 2010 - Google Wave API design principles + anatomy of a great extension Wave 201 Pamela Fox, Michael Goderbauer (Hasso Plattner Institute) Google Wave is all about collaboration. The most successful extensions are user-friendly and collaborative. Wave robots should be as intuitive to communicate with as a human, and play well with other robots; Wave gadgets should extend the metaphors of the textual collaboration into the visual. In this talk, we'll discuss the design and privacy principles you should consider while building extensions, and show examples of extensions that demonstrate these principles. For all I/O 2010 sessions, please go to code.google.com/events/io/2010/sessions.html From: GoogleDevelopers Views: 6 0 ratings Time: 01:01:54 More in Science & Technology

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  • Google I/O 2010 - YouTube API uploads: Tips & best practices

    Google I/O 2010 - YouTube API uploads: Tips & best practices Google I/O 2010 - YouTube API uploads: Tools, tips, and best practices Google APIs 201 Jeffrey Posnick, Gareth McSorley, Kuan Yong Are you integrating YouTube upload functionality into your mobile, desktop, or web app? Learn about Android and iPhone upload best practices, resuming interrupted YouTube uploads, and the YouTube Direct embeddable iframe for soliciting uploads on your existing web pages. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 11 0 ratings Time: 55:27 More in Science & Technology

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  • Google I/O 2010 - Real-time apps w/ App Engine and Feed API

    Google I/O 2010 - Real-time apps w/ App Engine and Feed API Google I/O 2010 - Building real-time web apps with App Engine and the Feed API Google APIs, App Engine 201 Brett Bavar, Moishe Lettvin We're introducing two new APIs which you can use to power real-time web apps: the App Engine Channel API and the Feed API v2 with push updates. Learn how the new Channel API allows you to push data from your App Engine app to an end user's browser. Also, learn how the new version of the Feed API allows you to subscribe to PubSubHubbub feeds and receive updates pushed to the browser. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 10 1 ratings Time: 38:50 More in Science & Technology

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  • Google I/O 2010 - Google Analytics APIs: End to end

    Google I/O 2010 - Google Analytics APIs: End to end Google I/O 2010 - Google Analytics APIs: End to end Google APIs 201 Nick Mihailovski Google Analytics measures performance of your website. Learn advanced techniques on how to use our tracking, processing and data export APIs as we walk you through an example of creating a most visited pages web element for your website. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 6 0 ratings Time: 55:42 More in Science & Technology

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  • Google I/O 2010 - Google Charts Toolkit

    Google I/O 2010 - Google Charts Toolkit Google I/O 2010 - Google Charts Toolkit: Google's new unified approach for creating dynamic charts on the web Google APIs 201 Michael Fink, Amit Weinstein Google Charts Toolkit is Google's unified approach for creating charts on the web. It provides a rich gallery spanning from pie charts to interactive heat-maps and from organizational trees to motion charts. The toolkit lets developers choose between JavaScript based client-side rendering and image based server-side rendering. We will present the relative strengths of these two approaches, and unveil the future visual design of Google Charts. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 9 0 ratings Time: 56:50 More in Science & Technology

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  • Google I/O 2010 - Waving across the web

    Google I/O 2010 - Waving across the web Google I/O 2010 - Waving across the web Wave 101 Dhanji Prasanna, Douwe Osinga This talk focuses on using the Google Wave APIs outside of the Google Wave product. We'll talk about how to take advantage of embedded waves to allow for commenting and discussions on your website, how to integrate your website with WaveThis using gadgets and robots for continued interactivity and how to use the wave data APIs to get access to wave content from your website. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 5 0 ratings Time: 01:00:24 More in Science & Technology

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  • Google I/O 2010 - Exploring the Google PowerMeter API

    Google I/O 2010 - Exploring the Google PowerMeter API Google I/O 2010 - Knowledge is (less) power: Exploring the Google PowerMeter API Google APIs 101 Srikanth Rajagopalan, Rus Heywood In this session we will discuss interesting ways to make users understand and manage their home energy use through Google PowerMeter. The Google PowerMeter API currently available allows devices to integrate with Google PowerMeter. Come learn how you can build with the API and about exciting developments ahead. We will dig into the implementation details for integrations and open up the floor for other ideas that may be relevant. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 5 0 ratings Time: 58:20 More in Science & Technology

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  • Google I/O 2010 - Bringing Google to your site

    Google I/O 2010 - Bringing Google to your site Google I/O 2010 - Bringing Google to your site Google APIs 101 DeWitt Clinton, Jeff Scudder This is an overview session about some of the many ways that a developer can enrich their site and more fully engage their visitors using Google products. We will cover a variety of products and APIs designed to quickly and easily improve and monetize your site, from AdSense and Custom Search to Feeds and Web Elements. We'll include announcements for several eye-popping new features. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 8 0 ratings Time: 57:26 More in Science & Technology

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  • Google I/O 2010 - How Maps API v3 came to be

    Google I/O 2010 - How Maps API v3 came to be Google I/O 2010 - How Maps API v3 came to be: Tips, tricks, and lessons learned in developing a cross platform desktop and mobile API Geo, Tech Talks Susannah Raub, Marc Ridey The Google JavaScript Maps API v3 celebrates its one year anniversary at this year's Google I/O. In this session, we reveal the reasons for embarking on a new API, the challenges we faced in developing a truly cross platform and cross device framework, and the lessons learned on the way. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 5 0 ratings Time: 48:08 More in Science & Technology

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  • Google I/O 2010 - Moving beyond markers: Advanced Maps API customization

    Google I/O 2010 - Moving beyond markers: Advanced Maps API customization Google I/O 2010 - Moving beyond markers: Advanced Maps API customization Geo 301 Jez Fletcher, David Day With such a large number of Google Maps API sites online, it can be hard to make your site stand out from the crowd. This session covers ways in which you can enhance your Maps API application to truly differentiate it, including customizing your overlays, controls, and map. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 16 0 ratings Time: 36:38 More in Science & Technology

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  • Is S3 cheaper than a EC2 DIY solution (for small files)

    - by Jann
    Is it really cheaper to host images and scripts via S3 than with an EC2 instance running nginx/varnish/etc. ? It seems to me (but i'm just getting started with AWS) that the request costs will be the major factor if you don't use sprites or other optimizations... or am i missing something ?

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  • problems, custum wrap (class) around PDO, doesn't work

    - by Knarf
    DB::construct(); $STH = DB::prepare('INSERT INTO users (username, password, email, activationkey) VALUES (?, UNHEX(?), ?, ?)'); var_dump($STH); $result = $STH->execute(array('test', 'nils', '[email protected]', '227a038fe9c81515b514cb152188e95c')); echo "working? <br />"; if($result == false) echo 'noooo...'; It outputs and doesn't put anything in the database. Works with a similare code with DPO just without my DB class. But I doesn't get any errors. Anyone have an idea what the problem could be? object(PDOStatement)#2 (1) { ["queryString"]=> string(87) "INSERT INTO users (username, password, email, activationkey) VALUES (?, UNHEX(?), ?, ?)" } working? <br /> noooo...

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  • C++ enum casting and templates

    - by JP
    I get the following error with VS2008: Conversion to enumeration type requires an explicit cast (static_cast, C-style cast or function-style cast) When casting a down casting a ClassA to ClassA_1 and ClassA_1 is a templated class that received an enum for parameter such as: ClassA { virtual ~ClassA(){}; } template <class Param1> ClassA_1 : public ClassA { public: //constructor ClassA_1(Param1 p1) { _p1 = p1; } Param1 _p1; } So I have a upcasted ClassA a = new ClassA_1<myenum>(); When I need to do this: ClassA_1<myenum> a1 = (ClassA_1<myenum> a); // This fails ... The only way it works is: ClassA_1<int> a1 = (ClassA_1<int> a); but this break my template as it must always deal with int... How to properly cast a enum that is now a int, back into the enum?

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  • jQuery slider - set background color to show desired range

    - by David
    Howdy, I'm setting up a Filament Group jQuery UI slider and using it in a gradebook. We need to allow teachers to set a desired background range (to show the desirable values vs. the actual value for a given grade). I'm hoping to set a shaded area (as shown in this picture) that would indicate to people viewing the slider which values are desirable. If the handle is within the desired ranges, then the value is satisfactory. If the handle is out of the background shaded range, then some changes may need to happen. Any suggestions on how to accomplish this? Based on what I've experimented with using Firebug, it looks like a <div class="ui-slider"> is setup, but the values inside of it don't seem to allow setting background-colors (only the div allows for that). Thanks for your help.

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