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• Adding multiplayer to an HTML5 game

  - by espais

  I am interested in making a game that I currently have a co-op experience, however I'm curious as to the best method of implementing this in HTML5. I have made games before using straight C sockets, and also with the Net library for SDL. What are some of my best options for doing this in a canvas-based environment? At present, all I can come up with are either AJAX/database solutions (with a high refresh rate), or somehow implementing a PHP server that would funnel the data through sockets. The overall gameplay would be a 2.5D platformer-ish type of game, so both clients would need to be continually updated with player positions, enemy positions, projectiles, environmental data, etc.

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• /dev/sda1 100% Mysql to blame?

  - by SJP

  I have a an API running that receives raw binaries, processes them, and then stores metadata about the bins in a mysql database. I have been running it for a couple days on a VM. Today the API stopped processing the mySQL commands. After using the command df-h the results were: root@mwdb1:/# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 104G 99G 0 100% / udev 16G 4.0K 16G 1% /dev tmpfs 6.3G 364K 6.3G 1% /run none 5.0M 0 5.0M 0% /run/lock none 16G 0 16G 0% /run/shm /dev/sdb1 5.5T 42G 5.2T 1% /data sda1 is at 100%

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• How do I add restrictions for users to sign up before they can access web site?

  - by user1867842

  How do I get my webpage not to go back when they hit the back button and are logged out and how can I add a web page to be blocked like FACEBOOK doesn't let you get into their site with out having a page or a account with them, and if you try to put something in the url and try to go to something on their site it gives you a web page that says "you have to be logged in first" . Like I don't want someone going to the url of the "index" page before they have signed up as a member they need to make an account first then they can have access to the "index" page. How do I do this. I have a website so far that has a database and the website has 5 pages so far and two of them which is the login and sign up page which are both used with php and mysql and they work fine. How do I restrict access to the main website by first having the users sign up with me for an account.

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• Algorithm for optimal combination of two variables

  - by AlanChavez

  I'm looking for an algorithm that would be able to determine the optimal combination of two variables, but I'm not sure where to start looking. For example, if I have 10,000 rows in a database and each row contains price, and square feet is there any algorithm out there that will be able to determine what combination of price and sq ft is optimal. I know this is vague, but I assume is along the lines of Fuzzy logic and fuzzy sets, but I'm not sure and I'd like to start digging in the right field to see if I can come up with something that solves my problem.

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• lighter-weight (semantic) scuttle

  - by hroptatyr

  Before patching scuttle or semanticscuttle I thought I'd ask if anyone knows of a lighter-weight/faster system to tag bookmarks and vote on them? LAMP is fine. Ideally, I should be allowed to interfere with the database directly. My actual problem is I want to administer roughly 80m bookmarks, tag them, vote on them (it's just 10 users accessing the system), but here's the thing: All of those bookmarks will change their descriptions (and title lines) at least once a day. Both systems support the del.icio.us API but my LAMP stack is unable to cope with the load.

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• How can I keep track of a battle log on a web game?

  - by Jay W

  Recently I started working on a Web turn-based PvP RPG game. Now I'm working on the battle system but I encountered some issues: How can I keep track of everything that happens in the battle? It should keep track of the characters on the field, inventory, the damage done etc. I first thought I would simply put it in the (MySQL) database, but I think it will be too much. Especially if several people are in a battle. I thought of puting this in sessions or cookies but I don't think thats reliable. Does anyone have an idea how I can do this?

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• Should I Learn C/C++ Even If I Just Want To Do Web Programming?

  - by Daniel

  My goal is to be able to create online apps and dynamic, database driven websites. For instance, if in the future I get the idea for the next Digg or Facebook, I want to be able to code it myself. To arrive there I think I have basically two paths: Path 1 Start at a basic level, learning C, then C++ for OOP, then algorithms and data structures, with the goal of getting a solid grasp of computer programming. Only then move to PHP/MySQL/HTTP and start working on practical programming projects. Path 2 Start directly with PHP/MySQL/HTTP and getting my hands dirty with practical projects right away. What would you guys recommend?

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• Personalized URL with pre-populated data

  - by AttackingHobo

  I think I am going to use Google spreadsheets and an embedded form. I see that it is possible to pre-populate the fields with URL parameters. So I think I just need a way to redirect with the correct data from a database when a user goes to their Personalized URL. I have no idea how to do the second part. Or if it is even the best way to do it. How do I set up Personalized URLS? How do I redirect from those URLS to the spreadsheets? Is this even the best method for pre-filled forms?

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• How to identify a PDF classification problem?

  - by burtonic

  We are crawling and downloading lots of companies' PDFs and trying to pick out the ones that are Annual Reports. Such reports can be downloaded from most companies' investor-relations pages. The PDFs are scanned and the database is populated with, among other things, the: Title Contents (full text) Page count Word count Orientation First line Using this data we are checking for the obvious phrases such as: Annual report Financial statement Quarterly report Interim report Then recording the frequency of these phrases and others. So far we have around 350,000 PDFs to scan and a training set of 4,000 documents that have been manually classified as either a report or not. We are experimenting with a number of different approaches including Bayesian classifiers and weighting the different factors available. We are building the classifier in Ruby. My question is: if you were thinking about this problem, where would you start?

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• SQL Saturday #310 - Dublin, Ireland

  SQL Saturday is coming to Dublin on September 20, 2014. Come for a free day of SQL Server training and networking. This year's conference features a mix of levels, topics, and speakers like Buck Woody (Big Data), Jen Stirrup (PowerBI), Denny Cherry (Storage), Red Gate's Tom Austin (Continuous integration), and more. Register while space is available. Need to compare and sync database schemas?Let SQL Compare do the hard work. ”With the productivity I'll get out of this tool, it's like buying time.” Robert Sondles. Download a free trial.

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• How can I designed multi-threaded application for larger user base

  - by rokonoid

  Here's my scenario, I need to develop a scalable application. My user base may be over 100K, every user has 10 or more small tasks. Tasks check every minute with a third party application through web services, retrieving data which is written in the database, then the data is forwarded to it's original destination. So here's the processing of a small task: while(true){ Boolean isNewInformationAvailable = checkWhetherInformationIsAvailableOrNot(); If(isNewInformationAvailable ==true){ fetchTheData(); writeToDatabase(); findTheDestination(); deliverTheData(); isAvailable =false; } } Here is the question: as the application is large, how should I approach designing this. I'm going to use Java to write it. Should I use concurrency, and how would you manage the concurrency?

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• SSMS Tools Pack 1.9.4 is out! Now with SQL Server 2011 (Denali) CTP1 support.

  - by Mladen Prajdic

  To end the year on a good note this release adds support for SQL Server 2011 (Denali) CTP1 and fixes a few bugs. Because of the new SSMS shell in SQL 2011 CTP1 the SSMS Tools Pack 1.9.4 doesn't have regions and debug sections functionality for now. The fixed bugs are: A bug that prevented to create insert statements for a database A bug that didn't script commas as decimal points correctly for non US settings. A bug with searching through grid results. A threading bug that sometimes happened when saving Window Content History. A bug with Window Connection Coloring throwing an error on startup if a server colors was undefined. A bug with changing shortcuts in SSMS for various features. You can download the new version 1.9.4 here. Enjoy it!

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• Where should I put a method that returns a list of active entries of a table?

  - by darga33

  I have a class named GuestbookEntry that maps to the properties that are in the database table named "guestbook". Very simple! Originally, I had a static method named getActiveEntries() that retrieved an array of all GuestbookEntry objects. Each row in the guestbook table was an object that was added to that array. Then while learning how to properly design PHP classes, I learned some things: Static methods are not desirable. Separation of Concerns Single Responsibility Principle If the GuestbookEntry class should only be responsible for managing single guestbook entries then where should this getActiveEntries() method most properly go? Update: I am looking for an answer that complies with the SOLID acronym principles and allows for test-ability. That's why I want to stay away from static calls/standard functions. DAO, repository, ...? Please explain as though your explanation will be part of "Where to Locate FOR DUMMIES"... :-)

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• shotwell does not copy, but import them without copying

  - by user65764

  I tryed to import photos from my external harddisk into shotwell. After doing this, I disconected the harddisk and the photos disapeared immediately. I saw that the photos had been importet into the database without being copied. Copying the whole file into the picturefile is possible, but I would like to have to same fileorder in my library. Not a mixed up (organised by date (shotwell) and organised by filenames (my old organisation). It has not been any problem copying photos from a dvd. Is there any possibility to have the same filestructure for all fotos or is there a bug in shotwell? Thanks

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• 301 redirect to 404 page?

  - by Kristian

  Currently i'm migrating www. prefix from my urls and use htaccess to do the job. Since we have new software and cleaned database some of the old urls doesnt exists anymore. Therefore some requests redirect to 404 page. 1. www.domain.com/old-page # htaccess redirect to non-www url, 301 2. domain.com/old-page # page does not exists, 404 Does this method have any SEO issues, or even affect pagerank? Or should i check the page existence before redirecting and show 404 without redirect?

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• Using Microsoft&apos;s Chart Controls In An ASP.NET Application: Serializing Chart Data

  In most usage scenarios, the data displayed in a Microsoft Chart control comes from some dynamic source, such as from a database query. The appearance of the chart can be modified dynamically, as well; past installments in this article series showed how to programmatically customize the axes, labels, and other appearance-related settings. However, it is possible to statically define the chart's data and appearance strictly through the control's declarative markup. One of the demos examined in the <a href="http://www.4guysfromrolla.com/articles/072209-1.aspx">Getting Started</a> article rendered a column chart with seven columns whose labels and values were defined statically in the <code>&lt;asp:Series&gt;</code> tag's

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• Visual Studio 2010 RC and Entity Framework 4 RC Support in the New Version of ADO.NET Data Providers

  Devart has recently announced the release of dotConnect products for Oracle, MySQL, PostgreSQL, and SQLite - ADO.NET providers that offer Entity Framework support, LINQ to SQL support, and contain an ORM model designer for developing LINQ to SQL and EF models based on different database engines. New dotConnect ADO.NET providers offer complete support for Visual Studio 2010 Release Candidate and Entity Framework 4 Release Candidate. Entity Developer 2.80, a designer for modeling and code generation...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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• LLBLGen Pro v3.0 has been released!

  After two years of hard work we released v3.0 of LLBLGen Pro today! V3.0 comes with a completely new designer which has been developed from the ground up for .NET 3.5 and higher. Below I'll briefly mention some highlights of this new release: Entity Framework (v1 & v4) support NHibernate support (hbm.xml mappings & FluentNHibernate mappings) Linq to SQL support Allows both Model first and Database first development, or a mixture of both .NET 4.0 support Model views Grouping...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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• BIT of a Problem

  The BIT data type is an awkward fit for a SQL database. It doesn't have just two values, and it can do unexpected things in expressions. What is worse, it is a flag rather than a predicate, and so its overuse, along with bit masks, is a prime candidate for being listed as a 'SQL Code Smell'. Joe Celko makes the case. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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• Topics for covering in-depth programming knowledge

  - by black_belt

  I pursued my bachelors' degree in business administration, but my interest in Information Technology led me to acquire some knowledge of PHP programming and MySQL database. I find programming so interesting that I haven't applied for any job since my graduation. Currently I am staying home and just trying to acquire in-depth knowledge of PHP programming. So far I have developed couple of websites and web applications including Inventory+ Point of Sale Software and an Accounting system for small organizations. I aim to have knowledge that a Computer Science graduate should have, and for that I want to read books but I have no idea where to start from. Could you please suggest me some books and topics that I should study on? Thanks a lot :)

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• SQLSaturday # 286 - Louisville, KY

  Join SQL Server MVP Grant Fritchey and other SQL Server professionals for a free day of training and networking at SQL Saturday Louisville, June 21. This is a free event, however there are also two paid-for precons available, run by Grant Fritchey and David Fackler. Register for SQL Sat while space is available. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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• Pending and Approval process

  - by zen

  So let's say I have a DB table with 8 columns, one is a unique auto-incrementing used as ID. So I have a page that pulls in the info for each row based on query string ID. I want to give my users the ability to propose changes. Kinda like a wiki setup. So I was thinking I should just have another duplicate table or maybe database altogether (without the auto-incrementing column and maybe with a date edited column) that keeps all proposed changes in queue and then when I approve them, the script can move the row from the proposed DB to the real DB. Does this sound good or is there a better process for this?

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• WSS Fails Installing On Step 5 Of The SharePoint Products and Technologies Configuration Wizard

  - by ptahiliani

  I've attempted to install WSS 3.0 with SP1 several times as both stand-alone and server farm with no luck on Windows Server 2008.  When I get to step 5 of Configuration wizard it begin installing and publishing services but on Step 5 I get the message "Failed To Register Sharepoint Services". The detail behind this message reads "An exception of type Microsoft.SharePoint.SPException was thrown". Then I Run the command psconfig -cmd configdb -create -database <whatever_unique_name> Click on Start / All Programs / Administrative Tools / SharePoint Products and Technologies Configuration Wizard Should work now (it did with me). PS: This was done on a Virtual Machine (VMware)

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• Cursor-Killing: Accessing Data in the Next Row

  Cursors are considered by many to be the bane of good T-SQL. What are the best ways to avoid iterative T-SQL and to write queries that look and perform beautifully? This first part in an ongoing series of cursor-killing handles inter-row analysis. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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• Adding tags for SEO in clothing website [duplicate]

  - by samyb8

  This question already has an answer here: What are the best ways to increase a site's position in Google? 18 answers I am building a site for a women's accessories brand. The site has a Homepage, a Store page (where all accessories are displayed), a page for each of the accessories description, an about page and a contact page. There is also a whole set up for shopping cart and checkout (irrelevant to this question). My issue is the SEO. Where can I put the keywords? The home page has only the menu and some photos. The store page displays the items and its titles. Then the specific item's page has a description of the item (pulled from the database), category and price. However, I feel like this is not enough for SEO for google ranking. Where could I add tags in this type of site?

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