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  • Stairway to Server-side Tracing - Level 10: Profiler versus Server-Side tracing

    Compares and contrasts tracing using Profiler with server-side tracing, illustrating important performance differences so that one can choose the right tool for the task at hand. Make working with SQL a breezeSQL Prompt 5.3 is the effortless way to write, edit, and explore SQL. It's packed with features such as code completion, script summaries, and SQL reformatting, that make working with SQL a breeze. Try it now.

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  • Why doesn't Haskell have type-level lambda abstractions?

    - by Petr Pudlák
    Are there some theoretical reasons for that (like that the type checking or type inference would become undecidable), or practical reasons (too difficult to implement properly)? Currently, we can wrap things into newtype like newtype Pair a = Pair (a, a) and then have Pair :: * -> * but we cannot do something like ?(a:*). (a,a). (There are some languages that have them, for example, Scala does.)

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  • Stairway to Transaction Log Management in SQL Server, Level 1: Transaction Log Overview

    The transaction log is used by SQL Server to maintain data consistency and integrity. If the database is not in Simple-recovery mode, it can also be used in an appropriate backup regime to restore the database to a point in time. The Future of SQL Server Monitoring "Being web-based, SQL Monitor enables you to check on your servers from almost any location" Jonathan Allen.Try SQL Monitor now.

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  • Stairway to PowerPivot and DAX - Level 4: The DAX BLANK() Function

    Business Intelligence architect and author Bill Pearson exposes the DAX BLANK() function, and then provides some hands-on exposure to its use in managing empty values underlying our PowerPivot model designs. Save 45% on our top SQL Server database administration tools. Together they make up the SQL DBA Bundle, which supports your core tasks and helps your day run smoothly. Download a free trial now.

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  • Duplicate content in Top Level Domain and country specific website

    - by Ando
    I have myproduct.com which is my master product page. For UK I also own myproduct.co.uk which is a copy of myproduct.com with some localized content: landing page, promotions, prices, and specific tags. But there is also duplicate content: myproduct.com/FAQs/ is the same as myproduct.co.uk/FAQs/ I don't want to do a redirect from myproduct.co.uk/FAQs/ to myproduct.com/FAQs/ as I don't want people to leave the localized website. The myproduct.com/FAQs/ is my "go-to" FAQ page and it's the most likely to be up to date - so I want this page to be indexed my search engines, where as I don't care about myproduct.co.uk/FAQs/ being indexed (unless indexing this page would increase my page rank :) ). What to do now to be SEO friendly & SEO optimal? Stop indexing of myproduct.co.uk/FAQs/ via robots.txt? Do some rel="alternate" hreflang="x" configuring on both /FAQs/ page? Something else?

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  • Stairway to XML: Level 5 - The XML exist() and nodes() Methods

    The XML exist() method is used, often in a WHERE clause, to check the existence of an element within an XML document or fragment. The nodes() method lets you shred an XML instance and return the information as relational data. 12 essential tools for database professionalsThe SQL Developer Bundle contains 12 tools designed with the SQL Server developer and DBA in mind. Try it now.

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  • Compressing 2D level data

    - by Lucius
    So, I'm developing a 2D, tile based game and a map maker thingy - all in Java. The problem is that recently I've been having some memory issues when about 4 maps are loaded. Each one of these maps are composed of 128x128 tiles and have 4 layers (for details and stuff). I already spent a good amount of time searching for solutions and the best thing I found was run-length enconding (RLE). It seems easy enough to use with static data, but is there a way to use it with data that is constantly changing, without a big drop in performance? In my maps, supposing I'm compressing the columns, I would have 128 rows, each with some amount of data (hopefully less than it would be without RLE). Whenever I change a tile, that whole row would have to be checked and I'm affraid that would slow down too much the production (and I'm in a somewhat tight schedule). Well, worst case scenario I work on each map individually, and save them using RLE, but it would be really nice if I could avoind that. EDIT: What I'm currently using to store the data for the tiles is a 2D array of HashMaps that use the layer as key and store the id of the tile in that position - like this: private HashMap< Integer, Integer [][]

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  • App Development books for intermediate level

    - by 0cool
    This question seems to be asked previously on this site but the audience targeted are different. I am an Engineering student who knows Python, C and familiar with Java(learning now; good at fundamentals) & HTML. Now, I want to develop facebook & Android apps. I went through their respective documentations but couldn't really understand and thought to search for beginner books but they have been written from too basic. (There is an beginner's android book for from APress for people who have no idea of programming). My problem is, I am unable to find the right book to learn. Either they are for beginners or for experts... For guys like me, can anyone point out a good book?

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  • How to do pragmatic high-level/meta-programming?

    - by Lenny222
    Imagine you have implemented the creation of a nice path-based star shape in Lisp. Then you discover Processing and you re-implement the whole code, because Processing/Java/Java2D is different. Then you want to tinker with libcinder, so you port your code to C++/Cairo. You are (re)writing a lot of boiler plate code, while the actual requirement "create a star shape" (or "create a path, moveto x y, lineto x y") has not changed. What are the options to encapsulate those implementation details? Some sort of pragmatic meta-programming? Maybe an expert system? How would you define your core business logic as language-independent as possible?

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  • Taking our Friendships to the next level.

    - by RedAndTheCommunity
    Red Gate have been running the Friends of Red Gate program for years now, and over that time we've built some great relationships with some truly awesome members of the SQL and .NET communities. When I took over the running of the program from Annabel in 2011, I was overwhelmed by the enthusiasm and commitment of our Friends. There were just so many of them, however, that it was hard to make the most of the relationships we had with people, and I wanted to fix that. I decided to survey all our Friends, to find out what they wanted to get out of, and put into, being in the Friends of Red Gate (FoRG) program. From the results of that survey, I identified 30 FoRGs that were really willing and able to go that step further to help Red Gate improve their tools, improve their relationship with the community, and improve the Friends of Red Gate program. Those 30 Friends of Red Gate have been awarded 'FoRG+' status. That means they'll: Have a closer relationship with the product teams, by getting involved in projects Have even more access to the inside track about the tools they're interested in Get the opportunity to come visit us at the Red Gate office and really influence the development of the tools. Plus more, depending on how the individual FoRG+ wants to work with us. This doesn't mean I've forgotten our other Friends; I'm working on ways to improve their experience of the Friends of Red Gate program. I'll write about them in another post. If you're an existing Friend of Red Gate, and you're interested in finding out how to get involved in the FoRG+ program, then I'd love to chat to you. For anyone that's interested in joining the Friend of Red Gate program, take a look at the web page dedicated to the program, and get in touch at [email protected] to be put on the waiting list for our 2013 program.

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  • Big level objects collision system for 2d game

    - by Aristarhys
    I read many variants today and get some knowledge in general, so here is a steps of mine thoughts in pictures (horrible paint.net ones). We need to develop grid system, so we check only thing near, perform simple check to cut out deep check, and at - last deep check like per-pixel collision check. Step 1 - Let p1, p2 are some sprites lets first just check with circle collision - because large distance between p1, p2 this fails and of course so we don't need test more deeply. But if we have not 2, but 20 objects, why we need to even circle test something so far outside of our view. Step 2 - Add basic column system, now we don't bother with p2 if it's in a column far from p1 column, so we even don't do circle test. But p3 is in the same col, so let do circle test, which of course will fail. Step 3 - Lets improve column system to the grid system with grid cell size just like p1, p2, p3 collision boxes, so we cut out things much top or below p1. And this is all great until comes BIG OBJs which is some kind of platforms. They are much bigger then grid cell. Circle test for will be successful, but deep check for whole big obj will fail And that the part I can't get. How do I store the grid position of big object? Like 4 grid coords for big object vertexes? And if one of them close to p1 do circle check for centre of big object then a deep one if succeed? Am I do it wrong? My possible solution:

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  • Next Best Action: an emerging engagement paradigm can elevate customer experience to the next level

    - by Richard Lefebvre
    As customer interactions increase across an expanding number of communication channels, business leaders are struggling to understand and engage with each customer effectively. To address this challenge, leading organizations are adopting strategies around “next best action,” a decision-support model that systematically identifies the next best step to take in the customer conversation—whether that action is providing additional information or targeted services, presenting a unique offer, or taking no action at all... Read the complete article - by Mark A. Stevens (vice president, Insight and Customer Strategy, at Oracle) - here

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  • Enemy Spawning method in a Top-Down Shooter

    - by Chris Waters
    I'm working on a top-down shooter akin to DoDonPachi, Ikaruga, etc. The camera movement through the world is handled automatically with the player able to move inside of the camera's visible region. Along the way, enemies are scripted to spawn at particular points along the path. While this sounds straightforward, I could see two ways to define these points: Camera's position: 'trigger' spawning as the camera passes by the points Time along path: "30 seconds in, spawn 2 enemies" In both cases, the camera-relative positions would be defined as well as the behavior of the enemy. The way I see it, the way you define these points will directly affect how the 'level editor', or what have you, will work. Would there be any benefits of one approach over the other?

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  • A High Level Comparison Between Oracle and SQL Server

    Organisations often employ a number of database platforms in their information system architecture. It is not uncommon to see medium to large sized companies using three to four different RDBMS packages. Consequently the DBAs these companies look for often ... [Read Full Article]

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  • Previewing a Demo Level in Mobile for UDK?

    - by Reno Yeo
    I've already clicked on "Emulate Mobile Features" and everything has been compiled. I've also set the mobile previewer settings to iPhone 4's dimensions and features. However, when i click on the mobile previewer, a new window pops up but it goes into a "Not Responding" mode after a while. Is there anything I'm doing wrong? To be honest, I'm afraid of the difficulty curve required in learning UDK, but I am interested in developing a game for it.

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  • Stairway to T-SQL DML Level 5: The Mathematics of SQL: Part 2

    Joining tables is a crucial concept to understanding data relationships in a relational database. When you are working with your SQL Server data, you will often need to join tables to produce the results your application requires. Having a good understanding of set theory, and the mathematical operators available and how they are used to join tables will make it easier for you to retrieve the data you need from SQL Server.

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  • High level overview of Visual Studio Extensibility APIs

    - by Daniel Cazzulino
    If your head is dizzy with the myriad VS services and APIs, from EnvDTE to Shell.Interop, this should clarify a couple things. First a bit of background: APIs on EnvDTE (DTE for short, since that’s the entry point service you request from the environment) was originally an API intended to be used by macros. It’s also called the automation API. Most of the time, this is a simplified API that is easier to work with, but which doesn’t expose 100% of what VS is capable of doing. It’s also kind of the “rookie” way of doing VS extensibility (VSX for short), since most hardcore VSX devs sooner or later realize that they need to make the leap to the “serious” APIs. The “real” VSX APIs virtually always start with IVs, make heavy use of uint, ref/out parameters and HResults. These are the APIs that have been evolving for years and years, and there is a lot of COM baggage. ...Read full article

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  • Entry level developer career advice [closed]

    - by Evan
    I just got done with college and I have a full time job with a large software company that I have been an intern at for over a year. As an intern I was on the web team doing lots of architecture and developing UI in ExtJS and some Java backend experience. Now as a full time employee I am mainly doing ExtJS applications, which I enjoy a lot, and I want to stay in the web development field, but: Am I limiting my career options with just doing ExtJS stuff? Will experience in ExtJS help or hinder my programming skills? Will I be looked down upon because I'm only gaining experienced with ExtJS?

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  • Project Management Techniques (high level)

    - by Sam J
    Our software dev team is currently using kanban for our development lifecycles, and, from the reasonably short experience of a few months, I think it's going quite well (certainly compared to a few months ago when we didn't really have a methodology). Our team, however, is directed to do work defined by project managers (not software project managers, just general business), and they're using the PMBOK methodology. Question is, how does a traditional methodology like PMBOK, Prince2 etc fit with a lean software development methodology like kanban or scrum? Is it just wasting everyone's time as all the requirements are effectively drawn up to start with (although inevitably changed along the way)?

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  • Using mod_speling with multi-level htaccess and rewriterules

    - by michaelcgorman
    We recently switched formats for managing our 301s. For the most part, everything went well, but it seems to have stopped mod_speling from working properly. Here's what we changed: old /var/www/html/.htaccess: RewriteEngine on RewriteBase / # Change SHTML to HTML RewriteRule ^(.*)\.shtml$ $1.html [R=permanent,L] # Change PCF to HTML ('cause, you know, we probably have CMS users like that...) RewriteRule ^(.*)\.pcf$ $1.html [R=permanent,L] # Force WWW subdomain for all requests RewriteCond %{HTTP_HOST} !^www.example.edu$ [NC] RewriteRule ^(.*)$ http://www.example.edu/$1 [R,L] # User accounts are on sun.example.edu RedirectMatch ^/~(.*)$ http://sun.example.edu/~$1 # Remove index.html at the end of URLs RewriteCond %{REQUEST_URI} ^(.*/)index\.html$ [NC] RewriteRule . %1 [R=301,NE,L] Redirect 301 /academics/calendar2012-13.html http://www.example.edu/academics/calendar.html Redirect 301 /academics/departments/ http://www.example.edu/majors/ Redirect 301 /academics/Pre-Medical.pdf http://www.example.edu/academics/Pre-Medicine.pdf Redirect 301 ... new /var/www/html/.htaccess: RewriteEngine on RewriteBase / # Change SHTML to HTML RewriteRule ^(.*)\.shtml$ $1.html [R=permanent,L] # Change PCF to HTML ('cause, you know, we probably have CMS users like that...) RewriteRule ^(.*)\.pcf$ $1.html [R=permanent,L] # Force WWW subdomain for all requests RewriteCond %{HTTP_HOST} !^www.example.edu$ [NC] RewriteRule ^(.*)$ http://www.example.edu/$1 [R,L] # User accounts are on sun.example.edu RedirectMatch ^/~(.*)$ http://sun.example.edu/~$1 # Remove index.html at the end of URLs RewriteCond %{REQUEST_URI} ^(.*/)index\.html$ [NC] RewriteRule . %1 [R=301,NE,L] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*) 404/$1 And then we added a new file at /var/www/html/404/.htaccess: RewriteEngine on RewriteBase /404 RewriteRule ^academics/calendar2012-13.html$ /academics/calendar.html [R=302,L] RewriteRule ^academics/departments/$ /majors/ [R=301,L] RewriteRule ^academics/Pre-Medical.pdf$ /academics/Pre-Medicine.pdf[R=301,L] RewriteRule ... I do have (Webmin-based) access to the httpd.conf (though we don't want to store all our 301s there, if possible). We're running Apache 2.2.15 on RHEL 6 on a server in our own data center. Like I said, the only problem we're seeing is that mod_speling isn't doing its magic anymore. The new format has so many advantages over the old that we really don't want to go back, but mod_speling is so nice to have that we'd also really like it to work if possible. Any ideas for how we might be able to fix mod_speling?

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