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  • Where is the best place to start learning Java Socket Programming?

    - by MarcoBoomTing
    I wish to create a Java Socket server which can be connected to using Javascript and/or Flash. I have experience in Connecting to sockets in flash, and using a comet like system in Ajax. I wish to make a live communication system, which will intale multiple connections to the server from various clients, needing almost instant communication between peers. I coded a system like this in PHP but I want to convert it to Java, simply because I don't want the PHP engine to be tied up on this Sever, as it serves all the web stuff normally on the site, and i've heard is more powerful for this sort of thing. Just looking for advice on where I can start learning how to write this sort of system using Java? I have previous coding experience in PHP, Javascript, Adobe Air and AS3 if That helps?

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  • What are the best tricks for learning how to -think- in Objective-C?

    - by Braintapper
    Before I get flamed out for not checking previous questions, I have read most of the tutorials, and have Hillegass' book, as well as O'Reilly's book on it. I'm not asking for tips on Cocoa or what IDE to use. Where my issue lies - my 'mental muscle memory' is making it hard for me to read Objective-C code. I have no problems at all reading Java and C code and understanding what's going on. Maybe I'm getting to old to learn a new syntax, but it's a struggle shifting mental gears and looking at Objective-C code and just "getting it" (I thought it might be an isolated case, but I have other friends who are seasoned devs who have said the same thing). Are there any tricks that any non-Objective-C programmers who now know Objective-C used to help process the syntactical differences when learning it? For some reason, I get dyslexic when reading Objective-C code. Maybe I'm not meant to be able to learn it (and that's ok too). I was hoping/wondering if there might be others who have had the same experience.

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  • Parallel programming, are we not learning from history again?

    - by mezmo
    I started programming because I was a hardware guy that got bored, I thought the problems being solved in the software side of things were much more interesting than those in hardware. At that time, most of the electrical buses I dealt with were serial, some moving data as fast as 1.5 megabit!! ;) Over the years these evolved into parallel buses in order to speed communication up, after all, transferring 8/16/32/64, whatever bits at a time incredibly speeds up the transfer. Well, our ability to create and detect state changes got faster and faster, to the point where we could push data so fast that interference between parallel traces or cable wires made cleaning the signal too expensive to continue, and we still got reasonable performance from serial interfaces, heck some graphics interfaces are even happening over USB for a while now. I think I'm seeing a like trend in software now, our processors were getting faster and faster, so we got good at building "serial" software. Now we've hit a speed bump in raw processor speed, so we're adding cores, or "traces" to the mix, and spending a lot of time and effort on learning how to properly use those. But I'm also seeing what I feel are advances in things like optical switching and even quantum computing that could take us far more quickly that I was expecting back to the point where "serial programming" again makes the most sense. What are your thoughts?

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  • learning C++ from java, trying to make a linked list.

    - by kyeana
    I just started learning c++ (coming from java) and am having some serious problems with doing anything :P Currently, i am attempting to make a linked list, but must be doing something stupid cause i keep getting "void value not ignored as it ought to be" compile errors (i have it marked where it is throwing it bellow). If anyone could help me with what im doing wrong, i would be very grateful :) Also, I am not used to having the choice of passing by reference, address, or value, and memory management in general (currently i have all my nodes and the data declared on the heap). If anyone has any general advice for me, i also wouldn't complain :P Key code from LinkedListNode.cpp LinkedListNode::LinkedListNode() { //set next and prev to null pData=0; //data needs to be a pointer so we can set it to null for //for the tail and head. pNext=0; pPrev=0; } /* * Sets the 'next' pointer to the memory address of the inputed reference. */ void LinkedListNode::SetNext(LinkedListNode& _next) { pNext=&_next; } /* * Sets the 'prev' pointer to the memory address of the inputed reference. */ void LinkedListNode::SetPrev(LinkedListNode& _prev) { pPrev=&_prev; } //rest of class Key code from LinkedList.cpp #include "LinkedList.h" LinkedList::LinkedList() { // Set head and tail of linked list. pHead = new LinkedListNode(); pTail = new LinkedListNode(); /* * THIS IS WHERE THE ERRORS ARE. */ *pHead->SetNext(*pTail); *pTail->SetPrev(*pHead); } //rest of class

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  • Question on MVVM pattern on WPF ?

    - by Ashish Ashu
    I have a user control let say UC1 . This user control have viewmodel UC1_vm. In the usercontrol UC1 I have a canvas in which drawing curve logic is implemented. This drawing curve logic is based on the data points property in the view model ( UC1_vm). The data points property inside the view model change with different condition. The generation of data points is written in the View Model. I want to bind the data points property in the view model to the draw curve logic inside the User control (view). I want whenever the data point property is changed in the view model , the canvas calls the draw curve method. Can I set the set any property of canvas which when changed it calls the on paint logic auto matically? Please suggest me the approach of implementing this scenario!!

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  • Learning Python and trying to get first two letters and last two letters of a string.

    - by Sergio Tapia
    Here's my code: # B. both_ends # Given a string s, return a string made of the first 2 # and the last 2 chars of the original string, # so 'spring' yields 'spng'. However, if the string length # is less than 2, return instead the empty string. def both_ends(s): if len(s) <= 2: return "" else: return s[0] + s[1] + s[len(s)-2] + s[len(s-1)] # +++your code here+++ return Unfortunately my program doesn't run. :( I'm sure I'm overlooking something since I'm a newbie with Python. Here's the error: > Traceback (most recent call last): File "C:\Users\Sergio\Desktop\google-python-exercises\google-python-exercises\basic\string1.py", line 120, in <module> main() File "C:\Users\Sergio\Desktop\google-python-exercises\google-python-exercises\basic\string1.py", line 97, in main test(both_ends('spring'), 'spng') File "C:\Users\Sergio\Desktop\google-python-exercises\google-python-exercises\basic\string1.py", line 44, in both_ends return s[0] + s[1] + s[len(s)-2] + s[len(s-1)] TypeError: unsupported operand type(s) for -: 'str' and 'int' Thanks for the help guys. :D

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  • Programmer performance

    - by RSK
    I am a PHP programmer with 1 year of experience. As I am just starting my career, I am learning a lot of things now. I can say I am a little bit of a perfectionist. When I am assigned a problem I start off by Googling. Then, even when I find a solution, I keep trying for a better one until I find 2-3 options. Then I start learning it and choose the best performing solution. Even though I am learning a lot, this process gets me labeled as a low performer. My questions: As a novice, should I continue to use this learning process and not worry about my performance? Should I focus more on my performance and less on how the code performs?

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  • Learning Visual C++ 2008 and C++ at the same time? Any resources to recommend?

    - by Javed Ahamed
    Hey guys, I am trying to learn Visual C++ 2008 and C++ at the same time to get involved with sourcemod, a server side modding tool for valve games. However I have never touched Visual C++ or C++ in general, and doing some preliminary research I am quite confused on these different versions of C++ (mfc, cli, win32), and why a lot of people seem to hate Visual C++ and use something like Borland instead. I really learn visually, and have used videos from places like Lynda.com with great success. I was wondering if anyone had any exceptional resources they had come across to teach Visual C++ 2k8, with its intricacies and setting up the IDE along with C++ at the same time. Books would be nice, but videos would be preferred, and I don't mind paying for resources. Thanks in advance!

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  • Any good tutorials or resources for learning how to design a scalable and "component" based game 'fr

    - by CodeJustin.com
    In short I'm creating a 2D mmorpg and unlike my last "mmo" I started developing I want to make sure that this one will scale well and work well when I want to add new in-game features or modify existing ones. With my last attempt with an avatar chat within the first few thousand lines of code and just getting basic features added into the game I seen my code quality lowering and my ability to add new features or modify old ones was getting lower too as I added more features in. It turned into one big mess that some how ran, lol. This time I really need to buckle down and find a design that will allow me to create a game framework that will be easy to add and remove features (aka things like playing mini-games within my world or a mail system or buddy list or a new public area with interactive items). I'm thinking that maybe a component based approach MIGHT be what I'm looking for but I'm really not sure. I have read documents on mmorpg design and 2d game engine architecture but nothing really explained a way of designing a game framework that will basically let me "plug-in" new features into the main game and use the resources of the main game without changing much within my 'main game code'. Hope someone understands what I mean, any help will is appreciated.

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  • How much of the "Objective-C" I'm learning is universal Objective-C, and not Apple's frameworks?

    - by Chris Cooper
    This question is related to one of my others about C: What can you do in C without “std” includes? Are they part of “C,” or just libraries? I've become curious lately as to what is really contained the the core Objective-C language, and what parts of the Objective-C I've done for iPhone/OS X development is specific to Apple platforms. I know that things like syntax are the same, but for instance, is NSObject and its torrent of NS-subclasses actually part of "standard" Objective-C? Could I use them in, say, Windows? What parts are universal for the most part, and what parts would I only find on an Apple platform? If you want, giving an example of Objective-C used elsewhere as an example of what is more "universal" would help me as well. Thanks! =)

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  • CodePlex Daily Summary for Monday, May 28, 2012

    CodePlex Daily Summary for Monday, May 28, 2012Popular ReleasesScreenShot: InstallScreenShot: This is the current stable release..Net Code Samples: Code Samples: Code samples (SLNs).LINQ_Koans: LinqKoans v.02: Cleaned up a bitKeelKit: KeelKit 3.0.7600.638: ?、??MySQL?Model?? Mysql ????? ? http://dev.mysql.com/downloads/connector/net/ ??? mysql-connector-net-6.5.4.msi ???， VS???KeelKit ???????MySQL , ????????? ?? DemoMySQL.rar ???， ???????????MySqL??Model. ?????? C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config\machine.config ??? ??????。 <system.data> <DbProviderFactories> <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlC...TwitterOAuth: TwitterOauth 0.25.16.0116: Beta releasetesttom05242012git02: d1: d1testdd05242012git001: zxczxc: zxczxczxcCODE Framework: 4.0.20524.0: This release has quite a few enhancements for WPF applications and SOA features. See change logs for more details.CommonLibrary.NET: CommonLibrary.NET 0.9.8 - Final Release: A collection of very reusable code and components in C# 4.0 ranging from ActiveRecord, Csv, Command Line Parsing, Configuration, Holiday Calendars, Logging, Authentication, and much more. FluentscriptCommonLibrary.NET 0.9.8 contains a scripting language called FluentScript. Application: FluentScript Version: 0.9.8 Build: 0.9.8.4 Changeset: 75050 ( CommonLibrary.NET ) Release date: May 24, 2012 Binaries: CommonLibrary.dll Namespace: ComLib.Lang Project site: http://fluentscript.codeplex.com...System Center Orchestrator Integration Packs: Active Directory 3.2: An integration pack enabling AD Automation 3.2 Updates LDAP Pathing updated to support cross forest scenarios Get Object Property Value Filtering efficiency enhancementsBunch of Small Tools: Mélangeur de vocabulaire japonais: Permet de générer des exercices de vocabulaire aléatoire à partir de listes de vocabulaire japonais. 22 listes sont fournies avec le programme.Expression Tree Visualizer for VS 2010: Expression Tree Visualizer Beta: This is a beta release, in this release some expression types are not handled and use a default visualization behavior. The first release will be published soon. Wait for it...Ulfi: Ulfi source: Build with Visual Studio 2010 Express C# or betterJayData - The cross-platform HTML5 data-management library for JavaScript: JayData 1.0 RC1 Refresh 2: JayData is a unified data access library for JavaScript developers to query and update data from different sources like webSQL, indexedDB, OData, Facebook or YQL. See it in action in this 6 minutes video: http://www.youtube.com/watch?v=LlJHgj1y0CU RC1 R2 Release highlights Knockout.js integrationUsing the Knockout.js module, your UI can be automatically refreshed when the data model changes, so you can develop the front-end of your data manager app even faster. Querying 1:N relations in W...Christoc's DotNetNuke Module Development Template: 00.00.08 for DNN6: BEFORE USE YOU need to install the MSBuild Community Tasks available from http://msbuildtasks.tigris.org For best results you should configure your development environment as described in this blog post Then read this latest blog post about customizing and using these custom templates. Installation is simple To use this template place the ZIP (not extracted) file in your My Documents\Visual Studio 2010\Templates\ProjectTemplates\Visual C#\Web OR for VB My Documents\Visual Studio 2010\Te...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.53: fix issue #18106, where member operators on numeric literals caused the member part to be duplicated when not minifying numeric literals ADD NEW FEATURE: ability to create source map files! The first mapfile format to be supported is the Script# format. Use the new -map filename switch to create map files when building your sources.CreditAnalytics: CreditAnalytics Release 1.5: 22 May 2012 (v1.5) (Build 449) Regressor Framework: Implementation of the regressor set, tolerance check, curve scenario regressors, regression framework suite, and the eventual regression output. Discount Curve Regression: Regressing Base Curve Creation, scenario Curve creation, and calculation of spot/effective implied rates and discount factors. Credit Curve Regression: Regressing Base Curve Creation, scenario Curve creation, and calculation of spot/effective implied hazard rates, reco...BlackJumboDog: Ver5.6.3: 2012.05.22 Ver5.6.3 　(1) HTTP????????、ftp://??????????????????????LogicCircuit: LogicCircuit 2.12.5.22: Logic Circuit - is educational software for designing and simulating logic circuits. Intuitive graphical user interface, allows you to create unrestricted circuit hierarchy with multi bit buses, debug circuits behavior with oscilloscope, and navigate running circuits hierarchy. Changes of this versionThis release is fixing start up issue.Orchard Project: Orchard 1.4.2: This is a service release to address 1.4 and 1.4.1 bugs. Please read our release notes for Orchard 1.4.2: http://docs.orchardproject.net/Documentation/Orchard-1-4-Release-NotesNew Projects.Net Code Samples: Various .Net code samples. AFSAspnetPusherV1: my new wns project lolAFSAspnetPusherV2: renewed version ofAFSAspnetPusherV4: renewed one v4AgileDesign Utilities Library: This library provides common functionality usable for most software projects: Logger - Asynchronous logging on top of new Microsoft logging class TraceSource with simplified API NameOf - Avoid using string names using static reflection Various reflection helpersAssociate Many to Many Relationship Entities Tool for Dynamics CRM 2011: Associate Many to many relationship tool is used for Dynamics CRM 2011 to associate or disassociate N:N relationship entities. This tool is dynamics crm 2011 solution, which consist of one entity and one plugin. Entity "Many to Many Relationship" record is used by Many to many relationship plugin to associate or disassociate entities. If many to many relationship entity record is created then plugin associate/disassociate entities from record data.Boxhead Multiplayer Server: A PHP dedicated server for my multiplayer version of Boxhead.CodedUITraceFiletoCSV: Console Application to parse the result file generated by Coded UI Test execution ".trx" into a comma separated file for more readable and detailed result.FlipExt: FlipExt is an easy to use image converter. It converts any image to .png .bmp .jpg .gif .tif .jpeg .tiff .ico. More extensions will be added soon.Foo Values Maker: Foo creates values for your test class variables so that you can write tests faster.FoodFree: Projeto de monitoramento de enchentesHouodeProject: ????ITLand of Dreams, Codename: Waterloo: We want to create a classical Live-MMORPG you can play on your smartphone (in the first step only “Windows Phone” will be supported) with the basic idea of Ultima Online or similiar games in our mind. You can create one or more characters, choose some name, gender, basic attributes (skin and hair color, …) a race (e.g. ‘Human’) and a profession (e.g. ‘fighter’ or ‘craftsman’). Now he can freely travel through the whole world, meeting other players, fighting monsters, absolving quests, tra...Makecert UI: Makecert UI is a shell layer application on top of the Microsoft makecert.exe utility. Makecert UI makes it easy for you to create self signed certificates, even from your own CA.MS CRM Rich Text box: Rich text box plug-in for MS CRM 2011. Hope it will be helpful for many of you. Thank you for using it and let me know if any further help needed.Nivo Slider Web Part SharePoint 2010: SharePoint 2010 implementation of Nivo Slider. Easy way to put Nivo slider on any page!!Office365 Weather WebPart: Office 365 WebPart that displays a 5 day weather forecast for a given location. The weather data is retrieved from the Met Office feed hosted on the Windows Azure Data Market. This is a free data feed that provides weather data for the UK only.Private Cloud Solution Design: This project is named “Training Cloud”. It provides an appropriate solution which can be used for technical audiences self learning with a hands-on-lab experience using Microsoft technology hosted in a virtualized environment built on System Center 2012. Since it depends on hardware, such as RAM, Sotrage, Network , etc. At last, the end user could have all labs ready which deloyed on private cloud. And it can be easily matain , setup labs with cloud’s function. pyUpdater: pyupdater provides a platform for updating python based applications.SharePoint Document Navigator: SP Document Navigator is a front-end solution for navigating a document library using jQuery and jQuery Mobile Trimetable: Train schedule for WP7Upload Master Pages & Page Layouts to Master Page Gallery using PowerShell: This document details the steps to upload Master pages and Page Layouts to Master Page Gallery using the “Upload Master Pages” Utility. 1- Download the .zip file 2- Edit the “UploadMasterPages.bat” file and Change the <<site collection url>> in the text below with respect to the environment. e.g. http://sitecollectionurl 3- Save the “UploadMasterPages.bat” file and close it. 4- Put all of your master pages and page layouts to Doc folder. 5- Run “UploadMasterPages.bat” file as Administrat...vivo: vivo Vietnamese Voice Vietnamese Voice recognition project thaihung.bkhn@gmail.com http://eking.vnvnv: VNV Vietnamese Voice Vietnamese Voice recognition project thaihung.bkhn@gmail.com http://eking.vnWindows Phone 7 User Guide Page: Take your app's users through a guided tour! Make your app's hidden gems shine, make users understand your app's logic and UX better.WP-FTS: This plugin for Wordpress replaces the default search engine, implemented using a simple "LIKE" operator, with the usage of the more powerful Full-Text Engine that comes with SQL Server.

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  • What are the prerequisites for learning embedded systems programming ?

    - by WarDoGG
    I have completed my graduation in Computer engineering. We had some basic electronics courses in Digital signal processing, Information theory etc but my primary field is Programming. However, i was looking to get into Embedded sytems programming with NO knowledge of how it is done. However, i am very keen on going into this field. My questions : what are the languages used to program embedded system programs ? Will i be able to learn without having any basics in electronics ? any other prerequisites that i should know ?

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  • Should I invest time in learning about OR\M or LINQ?

    - by Peter Smith
    I'm a .NET web developer primarily who occasionally writes console applications to mine data, cleanup tasks, etc. Most of what I do winds up involving a database which I currently design via sql server management studio, using stored procedures, and query analyzer. I also create a lot of web services which are consumed via AJAX applications. Do these technologies really help you in speeding up development times? Do you still have to build the database or object code first?

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  • Drawing path by Bezier curves

    - by OgreSwamp
    Hello. I have a task - draw smooth curve input: set of points (they added in realtime) current solution: I use each 4 points to draw qubic Bezier curve (1 - strart, 2 and 3rd - control points, 4- end). End point of each curve is start point for the next one. problem: at the curves connection I often have "fracture" (angle) Can you tell me, how to connect my points more smooth? Thanks!

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  • Help with GetGlyphOutline function(WinAPI)

    - by user146780
    I want to use this function to get contours and within these contours, I want to get cubic bezier. I think I have to call it with GGO_BEZIER. What puzzles me is how the return buffer works. "A glyph outline is returned as a series of one or more contours defined by a TTPOLYGONHEADER structure followed by one or more curves. Each curve in the contour is defined by a TTPOLYCURVE structure followed by a number of POINTFX data points. POINTFX points are absolute positions, not relative moves. The starting point of a contour is given by the pfxStart member of the TTPOLYGONHEADER structure. The starting point of each curve is the last point of the previous curve or the starting point of the contour. The count of data points in a curve is stored in the cpfx member of TTPOLYCURVE structure. The size of each contour in the buffer, in bytes, is stored in the cb member of TTPOLYGONHEADER structure. Additional curve definitions are packed into the buffer following preceding curves and additional contours are packed into the buffer following preceding contours. The buffer contains as many contours as fit within the buffer returned by GetGlyphOutline." I'm really not sure how to access the contours. I know that I can change a pointer another type of pointer but i'm not sure how I go about getting the contours based on this documentation. Thanks

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