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• How can I find the shortest path between two subgraphs of a larger graph?

  - by Pops

  I'm working with a weighted, undirected multigraph (loops not permitted; most node connections have multiplicity 1; a few node connections have multiplicity 2). I need to find the shortest path between two subgraphs of this graph that do not overlap with each other. There are no other restrictions on which nodes should be used as start/end points. Edges can be selectively removed from the graph at certain times (as explained in my previous question) so it's possible that for two given subgraphs, there might not be any way to connect them. I'm pretty sure I've heard of an algorithm for this before, but I can't remember what it's called, and my Google searches for strings like "shortest path between subgraphs" haven't helped. Can someone suggest a more efficient way to do this than comparing shortest paths between all nodes in one subgraph with all nodes in the other subgraph? Or at least tell me the name of the algorithm so I can look it up myself? For example, if I have the graph below, the nodes circled in red might be one subgraph and the nodes circled in blue might be another. The edges would all have positive integer weights, although they're not shown in the image. I'd want to find whatever path has the shortest total cost as long as it starts at a red node and ends at a blue node. I believe this means the specific node positions and edge weights cannot be ignored. (This is just an example graph I grabbed off Wikimedia and drew on, not my actual problem.)

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• The Other "C" in CRM

  - by [email protected]

  By Brian Dayton on April 5, 2010 7:04 PM Folks who know me know that I rarely, if ever, talk politics. And I never talk politicians. Having grown up in a household with one parent leaning left and the other leaning to the right it was the best way to keep the peace. This isn't about politics. It's about "constituents" and the need to improve the services and service levels for people--at the city, county, state/province, etc. level all the way up to national governments. As a citizen and tax payer it's also important to me that these services be provided at a reasonable cost. If there's a better and more efficient way to do something then it's my hope that a public sector organization takes advantage of technology the same way private sector companies do. Social services organizations have a complex job. They provide the services that people need, from healthcare and children's assistance to helping people find jobs. But many of these organizations are still managing these processes manually or outdated, home-grown applications that could have been written up to 30 years ago. A lot has changed in technology. On the (this is as political as I'm going to get) political front, stakeholders like you and me are expecting greater transparency on where and how funds are spent. I'll admit that most of the time, when I think about CRM systems, I think about my experience as a customer of my bank, utilities company or cable operator. But now that I'm older, have children and a house--I find myself interacting more and more with agencies and services organizations. My experiences are sometimes good and sometimes not so good. Along those lines, last week's announcement of Siebel CRM 8.2 for Public Sector caught my eye. You may not work in the public sector, but you are a constituent of some--actually a lot--of public sector organizations. I don't know which CRM systems city and county utilize but I'm going to start paying closer attention.

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• New Certification Exam Prep Seminar: Java EE 5/6 Web Component Developer

  - by Brandye Barrington

  I'm happy to announce the availability of a brand new Exam Prep Seminar titled Certification Exam Prep Seminar: Java EE 5/6 Web Component Developer. This new Exam Prep Seminar is available standalone, and will soon be available through a Certification Value Package, which includes (1) the Seminar, and (2) a certification exam voucher with a free retake. For those of you preparing for the Oracle Certified Professional, Java EE 5 Web Component Developer certification or the Oracle Certified Expert, Java Platform, EE 6 Web Component Developer certification, this seminar is a great value and and an excellent way to gain valuable insight from one of Oracle University's top instructors. This Exam Prep Seminar will accelerate your preparation, make your prep time more efficient and give you insight to the breadth and depth of the certification exam. This type of exam preparation has traditionally only been available at the Oracle OpenWorld conference, but is now available to anyone through this new format. Of course with online video, you can now start, stop, rewind, and review as needed! Also note that because this seminar is in the Oracle Training On Demand format, you can also watch it on your your iPad through Oracle University's new free iPad app. QUICK LINKS SEMINAR: Certification Exam Prep Seminar: Java EE 5/6 Web Component Developer VALUE PACKAGE: Coming Soon! EXAM: 1Z0-858  Java Enterprise Edition 5 Web Component Developer Certified Professional Exam EXAM: 1Z0-859  Java Enterprise Edition 5 Web Component Developer Certified Professional Upgrade Exam EXAM: 1Z0-899  Java EE 6 Web Component Developer Certified Expert Exam CERTIFICATION: Oracle Certified Professional, Java EE 5 Web Component Developer CERTIFICATION: Oracle Certified Expert, Java Platform, EE 6 Web Component Developer

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• How can I use iteration to lead targets?

  - by e100

  In my 2D game, I have stationary AI turrets firing constant speed bullets at moving targets. So far I have used a quadratic solver technique to calculate where the turret should aim in advance of the target, which works well (see Algorithm to shoot at a target in a 3d game, Predicting enemy position in order to have an object lead its target). But it occurs to me that an iterative technique might be more realistic (e.g. it should fire even when there is no exact solution), efficient and tunable - for example one could change the number of iterations to improve accuracy. I thought I could calculate the current range and thus an initial (inaccurate) bullet flight time to target, then work out where the target would actually be by that time, then recalculate a more accurate range, then recalculate flight time, etc etc. I think I am missing something obvious to do with the time term, but my aimpoint calculation does not currently converge after the significant initial correction in the first iteration: import math def aimpoint(iters, target_x, target_y, target_vel_x, target_vel_y, bullet_speed): aimpoint_x = target_x aimpoint_y = target_y range = math.sqrt(aimpoint_x**2 + aimpoint_y**2) time_to_target = range / bullet_speed time_delta = time_to_target n = 0 while n <= iters: print "iteration:", n, "target:", "(", aimpoint_x, aimpoint_y, ")", "time_delta:", time_delta aimpoint_x += target_vel_x * time_delta aimpoint_y += target_vel_y * time_delta range = math.sqrt(aimpoint_x**2 + aimpoint_y**2) new_time_to_target = range / bullet_speed time_delta = new_time_to_target - time_to_target n += 1 aimpoint(iters=5, target_x=0, target_y=100, target_vel_x=1, target_vel_y=0, bullet_speed=100)

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• 10gR2 Transportable Tablespaces Certified for EBS 11i

  - by Steven Chan

  Database migration across platforms of different "endian" (byte ordering) formats using the Cross Platform Transportable Tablespaces (XTTS) process is now certified for Oracle E-Business Suite Release 11i (11.5.10.2) with Oracle Database 10g Release 2.  This process is sometimes also referred to as transportable tablespaces (TTS).What is the Cross-Platform Transportable Tablespace Feature?The Cross-Platform Transportable Tablespace feature allows users to move a user tablespace across Oracle databases. It's an efficient way to move bulk data between databases. If the source platform and the target platform are of different endianness, then an additional conversion step must be done on either the source or target platform to convert the tablespace being transported to the target format. If they are of the same endianness, then no conversion is necessary and tablespaces can be transported as if they were on the same platform.Moving data using transportable tablespaces can be much faster than performing either an export/import or unload/load of the same data. This is because transporting a tablespace only requires the copying of datafiles from source to the destination and then integrating the tablespace structural information. You can also use transportable tablespaces to move both table and index data, thereby avoiding the index rebuilds you would have to perform when importing or loading table data.

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• Read On Phone Pushes Data from Your Desktop to the Appropriate Android App

  - by ETC

  Read On Phone is a free Android application that intelligently pushes data to your phone from your bowser. Rather than simply opening the URL on your phone, it opens the appropriate application for the task and formats text. Most send-to-phone type tools simply take the URL of the web page you’re looking at on your computer and shuttle it to your phone. Read On Phone is a more active and effective tool. When you send a page that is text, it formats the text for easy reading on your phone. When you send a YouTube video, map, or telephone number, it opens up the appropriate tool on your phone such as your YouTube viewer, Google Maps, or your phone dialer. In addition to that handy functionality Read On Phone also includes adjustments for day and night reading, font size, auto-scrolling, and pagination. Read On Phone is available as both a Chrome extension and as a bookmarklet for cross-browser use. Hit up the link below for additional information. Read On Phone Latest Features How-To Geek ETC Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) Read On Phone Pushes Data from Your Desktop to the Appropriate Android App MetroTwit is a Sleek Native Twitter Client for Your Windows System Make Efficient Use of Tab Bar Space by Customizing Tab Width in Firefox See the Geeky Work Done Behind the Scenes to Add Sounds to Movies [Video] Use a Crayon to Enhance Engraved Lettering on Electronics Adult Swim Brings Their Programming Lineup to iOS Devices

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• A Year of Upheaval for Procurement Professionals-New Report & Webinar

  - by DanAshton

  2013 will see significant changes in priorities and initiatives among procurement professionals as they balance the needs of their enterprises with efforts to add capabilities for long-term procurement success. In response, procurement managers will expand their organization’s spend influence via supplier relationship management, sourcing, and category management. These findings are part of the new report, “2013 Procurement Key Issues: Going Deeper and Broader to Deliver Borderless Procurement Services,” by the Hackett Group. The authors say that compared to similar studies over the last five years, 2013 is registering the greatest year-over-year changes in priorities for both procurement performance and capability issues. Three Important PrioritiesThe survey found that procurement professionals are focusing their attention in three key areas. Cost reduction. Controlling expenses is always a high priority, but with 90 percent of the respondents now placing this at the top of their performance concerns, the Hackett analysts say this “clearly shows that, for better or worse, cost reduction is king” in 2013. Technology innovation. Innovation has shot up significantly in the priority rankings and is now tied with spend influence for second among procurement professionals. Sixty-five percent of the survey participants said pursuing game-changing innovation and technology is a top procurement initiative. Managing supply risk. This area registered a sharp rise in importance because of its role in protecting profits, Hackett says. Supplier compliance with performance milestones and regulatory requirements is receiving particular attention, with an emphasis on efficient management of cross-functional workflows. “These processes create headaches for suppliers and buyers alike, and can detract from strategic value creation when participants are bogged down in processing paper and spreadsheets,” the report explains.  For more insights into the current state of the procurement industry, download the full report, “2013 Procurement Key Issues: Going Deeper and Broader to Deliver Borderless Procurement Services” and watch a Webcast featuring Global Procurement Advisory Practice Leader for The Hackett Group, Chis Sawchuk, and Managing Supervisor of Supply Chain Processes and Systems for Ameren, Chris Nelms. 

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• How to fetch only the sprites in the player's range of motion for collision testing? (2D, axis aligned sprites)

  - by Twodordan

  I am working on a 2D sprite game for educational purposes. (In case you want to know, it uses WebGl and Javascript) I've implemented movement using the Euler method (and delta time) to keep things simple. Now I'm trying to tackle collisions. The way I wrote things, my game only has rectangular sprites (axis aligned, never rotated) of various/variable sizes. So I need to figure out what I hit and which side of the target sprite I hit (and I'm probably going to use these intersection tests). The old fashioned method seems to be to use tile based grids, to target only a few tiles at a time, but that sounds silly and impractical for my game. (Splitting the whole level into blocks, having each sprite's bounding box fit multiple blocks I might abide. But if the sprites change size and move around, you have to keep changing which tiles they belong to, every frame, it doesn't sound right.) In Flash you can test collision under one point, but it's not efficient to iterate through all the elements on stage each frame. (hence why people use the tile method). Bottom line is, I'm trying to figure out how to test only the elements within the player's range of motion. (I know how to get the range of motion, I have a good idea of how to write a collisionCheck(playerSprite, targetSprite) function. But how do I know which sprites are currently in the player's vicinity to fetch only them?) Please discuss. Cheers!

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• Inspiration

  - by Oracle Campus Blog

  Once again, I find myself back in Seoul – ASEM Tower, 16th Floor in a mobile room. I’m busy preparing for the interview process that is about to take place for Oracle Korea’s GIP 7th (Graduate Intake Program): scheduling the first round interviews, organizing interview guidelines, educating interviewers on the process and framework and  getting all the logistics ready for the 1st round interview. Seoul or Korea rather is a fascinating place. Highly efficient, the utmost respect for seniors and results orientated. When students come in for an interview at first it was hard to tell them apart – there seems to be accepted interview attire that must be worn when attending an interview. Males and Females, all dress in black suits, with white shirts underneath – with males to wear simple and dark colored ties. During the interview, they would all sit very upright, all would bow when entering the room, place their hands on the laps and very often they would hold minimal eye contact. They would project their voice loud to portray confidence, they would talk in the Korean formal dialect at all times and will treat every question, every moment with extreme clarity and the utmost professionalism. When the interview concludes, they will all stand hands by their sides, bow 90 degrees and thank all the interviewers for their precious time and opportunity. As soon as they leave the interview room, I could hear all their sighs of relief and commended each other on their efforts. More and more I learn about the Korean culture it inspires me. Their patriotism, their respect for each, their values, their appreciation, their motivation, their desires and passion – it truly was an experience for me (even as a recruiter) and can’t help but feel truly impressed and motivated to live for every moment. Philip Yi     Oracle Campus Recruiter 

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• Ruby: implementing alpha-beta pruning for tic-tac-toe

  - by DerNalia

  So, alpha-beta pruning seems to be the most efficient algorithm out there aside from hard coding (for tic tac toe). However, I'm having problems converting the algorithm from the C++ example given in the link: http://www.webkinesia.com/games/gametree.php #based off http://www.webkinesia.com/games/gametree.php # (converted from C++ code from the alpha - beta pruning section) # returns 0 if draw LOSS = -1 DRAW = 0 WIN = 1 @next_move = 0 def calculate_ai_next_move score = self.get_best_move(COMPUTER, WIN, LOSS) return @next_move end def get_best_move(player, alpha, beta) best_score = nil score = nil if not self.has_available_moves? return false elsif self.has_this_player_won?(player) return WIN elsif self.has_this_player_won?(1 - player) return LOSS else best_score = alpha NUM_SQUARES.times do |square| if best_score >= beta break end if self.state[square].nil? self.make_move_with_index(square, player) # set to negative of opponent's best move; we only need the returned score; # the returned move is irrelevant. score = -get_best_move(1-player, -beta, -alpha) if (score > bestScore) @next_move = square best_score = score end undo_move(square) end end end return best_score end the problem is that this is returning nil. some support methods that are used above: WAYS_TO_WIN = [[0, 1, 2], [3, 4, 5], [6, 7, 8], [0, 3, 6], [1, 4, 7], [2, 5, 8],[0, 4, 8], [2, 4, 6]] def has_this_player_won?(player) result = false WAYS_TO_WIN.each {|solution| result = self.state[solution[0]] if contains_win?(solution) } return (result == player) end def contains_win?(ttt_win_state) ttt_win_state.each do |pos| return false if self.state[pos] != self.state[ttt_win_state[0]] or self.state[pos].nil? end return true end def make_move(x, y, player) self.set_square(x,y, player) end

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• Crawling a Content Folio

  - by Kyle Hatlestad

  Content Folios in WebCenter Content allow you to assemble, track, and access a logical group of documents and/or links.  It allows you to manage them as just a list of items (simple folio) or organized as a hierarchy (advanced folio).  The built-in UI in content server allows you to work with these folios, but publishing them or consuming them externally can be a bit of a challenge.   The folios themselves are actually XML files that contain the structure, attributes, and pointers to the content items.  So to publish this somewhere, such as a Site Studio page, you could perhaps use an XML parser to traverse the structure and create your output.  But XML parsers are not always the easiest or most efficient to use.  In order to more easily crawl and consume a Content Folio, Ed Bryant - Principal Sales Consultant, wrote a component to do just that.  His component adds a service which does all the work for you and returns the folio structure as a simple resultset.  So consuming and publishing that folio on a Site Studio page or in your portal using RIDC is a breeze!  For example, let's take an advanced Content Folio example like this: If we look at the native file, the XML looks like this: But if we access the folio using the new service - http://server/cs/idcplg?IdcService=FOLIO_CRAWL&dDocName=ecm008003&IsPageDebug=1 - this is what the result set looks like (using the IsPageDebug parameter). Given this as the result set, it makes it very easy to consume and repurpose that folio. You can download a copy of the sample component here. Special thanks to Ed for letting me share this component!

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• Attend my Tech Ed 2014 session: Debugging Tips and Tricks

  - by Daniel Moth

  Just a week away, at Tech Ed 2014 NA in Houston Texas, I will be giving a demo presentation that you will not want to miss (assuming you code in Visual Studio). Add it to your calendar now: DEV-B352 Debugging Tips and Tricks in Visual Studio 2013 (link) Monday, May 12 1:15-2:30 PM, Room: General Assembly C As a developer, regardless of your programming language or the platform that you target, you use the debugger on a daily basis. Come to this all-demo session to learn how to make the most of the Visual Studio debugger, and hence be more productive and effective in your everyday development. We tour almost all of the debugger surface and many of its commands, throwing in tips and tricks as we go along, and also calling out what is brand new in the latest version of the debugger in Microsoft Visual Studio 2013. Whatever your experience level, you are guaranteed to leave with new knowledge of debugger features that you will want to use immediately when you are back at your computer!   I am also co-presenting another session later in the week. DEV-B313 Diagnosing Issues in Windows Phone 8.1 XAML Applications Using Visual Studio 2013 (link) Thursday, May 15 10:15-11:30 AM, Room: 340 Come to this demo-driven session to learn how to use the latest diagnostic tools in Visual Studio 2013 to make your Windows Phone 8.1 XAML apps reliable, fast, and efficient. Learn how to make the most of existing capabilities in the debugger as well as new debugging features for diagnosing correctness issues. Also, see the Visual Studio Performance and Diagnostics hub in action with its performance analysis tools for diagnosing CPU usage, memory usage, and energy consumption. The techniques covered in this session apply equally well for Windows Store apps as well as Windows Phone Store apps, so all your device development needs will be covered.   Links to both sessions from my Tech Ed speaker page. See you there! Comments about this post by Daniel Moth welcome at the original blog.

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• What's a "Cloud Operating System"?

  - by user12608550

  What's a "Cloud Operating System"? Oracle's recently introduced Solaris 11 has been touted as "The First Cloud OS". Interesting claim, but what exactly does it mean? To answer that, we need to recall what characteristics define a cloud and then see how Solaris 11's capabilities map to those characteristics. By now, most cloud computing professionals have at least heard of, if not adopted, the National Institute of Standards and Technology (NIST) Definition of Cloud Computing, including its vocabulary and conceptual architecture. NIST says that cloud computing includes these five characteristics: On-demand self-service Broad network access Resource pooling Rapid elasticity Measured service How does Solaris 11 support these capabilities? Well, one of the key enabling technologies for cloud computing is virtualization, and Solaris 11 along with Oracle's SPARC and x86 hardware offerings provides the full range of virtualization technologies including dynamic hardware domains, hypervisors for both x86 and SPARC systems, and efficient non-hypervisor workload virtualization with containers. This provides the elasticity needed for cloud systems by supporting on-demand creation and resizing of application environments; it supports the safe partitioning of cloud systems into multi-tenant infrastructures, adding resources as needed and deprovisioning computing resources when no longer needed, allowing for pay-only-for-usage chargeback models. For cloud computing developers, add to that the next generation of Java, and you've got the NIST requirements covered. The results, or one of them anyway, are services like the new Oracle Public Cloud. And Solaris is the ideal platform for running your Java applications. So, if you want to develop for cloud computing, for IaaS, PaaS, or SaaS, start with an operating system designed to support cloud's key requirements…start with Solaris 11.

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• What's the relationship between meta-circular interpreters, virtual machines and increased performance?

  - by Gomi

  I've read about meta-circular interpreters on the web (including SICP) and I've looked into the code of some implementations (such as PyPy and Narcissus). I've read quite a bit about two languages which made great use of metacircular evaluation, Lisp and Smalltalk. As far as I understood Lisp was the first self-hosting compiler and Smalltalk had the first "true" JIT implementation. One thing I've not fully understood is how can those interpreters/compilers achieve so good performance or, in other words, why is PyPy faster than CPython? Is it because of reflection? And also, my Smalltalk research led me to believe that there's a relationship between JIT, virtual machines and reflection. Virtual Machines such as the JVM and CLR allow a great deal of type introspection and I believe they make great use it in Just-in-Time (and AOT, I suppose?) compilation. But as far as I know, Virtual Machines are kind of like CPUs, in that they have a basic instruction set. Are Virtual Machines efficient because they include type and reference information, which would allow language-agnostic reflection? I ask this because many both interpreted and compiled languages are now using bytecode as a target (LLVM, Parrot, YARV, CPython) and traditional VMs like JVM and CLR have gained incredible boosts in performance. I've been told that it's about JIT, but as far as I know JIT is nothing new since Smalltalk and Sun's own Self have been doing it before Java. I don't remember VMs performing particularly well in the past, there weren't many non-academic ones outside of JVM and .NET and their performance was definitely not as good as it is now (I wish I could source this claim but I speak from personal experience). Then all of a sudden, in the late 2000s something changed and a lot of VMs started to pop up even for established languages, and with very good performance. Was something discovered about the JIT implementation that allowed pretty much every modern VM to skyrocket in performance? A paper or a book maybe?

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• Here Is Official GMail App For iPhones & iPads

  - by Gopinath

  Its a great day for GMail users! Few hours ago Google pushed a new GMail web user interface to all the users and now they released GMail iOS App[iTunes Link]. After delaying several years Google at last released a native GMail application of iPhone, iPad & iPod touch. In a blog post, Google says We’ve combined your favorite features from the Gmail mobile web app and iOS into one app so you can be more productive on the go.It’s designed to be fast, efficient and take full advantage of the touchscreen and notification capabilities of your device. The iOS App includes almost all the features that are found on Android version of GMail app -  users can star, label, archive, access the Priority Inbox and push notifications for new mail alerts. It also includes standard touchscreen commands like pull down to refresh and swipe to scroll emails. Go and grab the GMail App from iTunes This article titled,Here Is Official GMail App For iPhones & iPads, was originally published at Tech Dreams. Grab our rss feed or fan us on Facebook to get updates from us.

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• Pathfinding in multi goal, multi agent environment

  - by Rohan Agrawal

  I have an environment in which I have multiple agents (a), multiple goals (g) and obstacles (o). . . . a o . . . . . . . o . g . . a . . . . . . . . . . o . . . . o o o o . g . . o . . . . . . . o . . . . o . . . . o o o o a What would an appropriate algorithm for pathfinding in this environment? The only thing I can think of right now, is to Run a separate version of A* for each goal separately, but i don't think that's very efficient.

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• In the days of modern computing, in 'typical business apps' - why does performance matter?

  - by Prog

  This may seem like an odd question to some of you. I'm a hobbyist Java programmer. I have developed several games, an AI program that creates music, another program for painting, and similar stuff. This is to tell you that I have an experience in programming, but not in professional development of business applications. I see a lot of talk on this site about performance. People often debate what would be the most efficient algorithm in C# to perform a task, or why Python is slow and Java is faster, etc. What I'm trying to understand is: why does this matter? There are specific areas of computing where I see why performance matters: games, where tens of thousands of computations are happening every second in a constant-update loop, or low level systems which other programs rely on, such as OSs and VMs, etc. But for the normal, typical high-level business app, why does performance matter? I can understand why it used to matter, decades ago. Computers were much slower and had much less memory, so you had to think carefully about these things. But today, we have so much memory to spare and computers are so fast: does it actually matter if a particular Java algorithm is O(n^2)? Will it actually make a difference for the end users of this typical business app? When you press a GUI button in a typical business app, and behind the scenes it invokes an O(n^2) algorithm, in these days of modern computing - do you actually feel the inefficiency? My question is split in two: In practice, today does performance matter in a typical normal business program? If it does, please give me real-world examples of places in such an application, where performance and optimizations are important.

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• What's a good Game development platform for a platformer game with these characteristics?

  - by Joe

  Yes, I know, the best way to make an indie game is to learn to code. I've got some scripting experience, but I want to do worldbuilding with already-existing tools (and communities surrounding those tools), and I've been really impressed with games like An Untitled Story that were made with pre-packaged toolsets at their core, like Game Maker. :) So I'm planning to make my game using either Game Maker or something like it. The basic parameters of my planned game: -2D platformer. -Physics/speed akin to Sonic the Hedgehog. -Large, non-linear world, flowing as seamlessly as possible -- think Super Metroid, but without the forced screen transitions. The first two points have me leaning toward Game Maker -- Plenty of 2D platformers have been made with it, and there are serviceable, openly available Sonic-the-Hedgehog-style physics engines for it that could be adapted to my needs with minimal muss and fuss. But the third makes me antsy -- from what limited information I hear, Game Maker has problems with large levels/boards/screens/whateveryoucallthem, thus necessitating transitions between screens. I want to avoid that if at all possible -- it would, I believe, fundamentally alter the flow of the game. I understand that generally speaking, the more you have loaded into memory the more things are going to chug (especially for a one-size-fits-all game development platform that isn't a model of efficient coding), but I'm hoping there are systems that can un-load objects that are sufficiently far offscreen and thus better produce seamlessness. Any thoughts, people? :) The sooner I can get a basic pre-fab physics engine and world-building program up and running, the sooner I can start prototyping areas and generally tooling around. Should I be looking at Game Maker, or elsewhere? (My current plan is to more-or-less build the game prototype-style, then worry about art and sound at the very end once the damn thing is playable.)

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• How can I cull non-visible isometric tiles?

  - by james

  I have a problem which I am struggling to solve. I have a large map of around 100x100 tiles which form an isometric map. The user is able to move the map around by dragging the mouse. I am trying to optimize my game only to draw the visible tiles. So far my code is like this. It appears to be ok in the x direction, but as soon as one tile goes completely above the top of the screen, the entire column disappears. I am not sure how to detect that all of the tiles in a particular column are outside the visible region. double maxTilesX = widthOfScreen/ halfTileWidth + 4; double maxTilesY = heightOfScreen/ halfTileHeight + 4; int rowStart = Math.max(0,( -xOffset / halfTileWidth)) ; int colStart = Math.max(0,( -yOffset / halfTileHeight)); rowEnd = (int) Math.min(mapSize, rowStart + maxTilesX); colEnd = (int) Math.min(mapSize, colStart + maxTilesY); EDIT - I think I have solved my problem, but perhaps not in a very efficient way. I have taken the center of the screen coordinates, determined which tile this corresponds to by converting the coordinates into cartesian format. I then update the entire box around the screen.

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• How to improve designer and developer work flow?

  - by mbdev

  I work in a small startup with two front end developers and one designer. Currently the process starts with the designer sending a png file with the whole page design and assets if needed. My task as front end developer is to convert it to a HTML/CSS page. My work flow currently looks like this: Lay out the distinct parts using html elements. Style each element very roughly (floats, minimal fonts and padding) so I can modify it using inspection. Using Chrome Developer Tools (inspect) add/change css attributes while updating the css file. Refresh the page after X amount of changes Use Pixel Perfect to refine the design more. Sit with the designer to make last adjustments. Inferring the paddings, margins, font sizes using trial and error takes a lot of time and I feel the process could become more efficient but not sure how to improve it. Using PSD files is not an option since buying Photoshop for each developer is currently not considered. Design guide is also not available since design is still evolving and new features are introduced. Ideas for improving the process above and sharing how the process looks like in your company will be great.

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• What's a nice explanation for pointers?

  - by Macneil

  In your own studies (on your own, or for a class) did you have an "ah ha" moment when you finally, really understood pointers? Do you have an explanation you use for beginner programmers that seems particularly effective? For example, when beginners first encounter pointers in C, they might just add &s and *s until it compiles (as I myself once did). Maybe it was a picture, or a really well motivated example, that made pointers "click" for you or your student. What was it, and what did you try before that didn't seem to work? Were any topics prerequisites (e.g. structs, or arrays)? In other words, what was necessary to understand the meaning of &s and *, when you could use them with confidence? Learning the syntax and terminology or the use cases isn't enough, at some point the idea needs to be internalized. Update: I really like the answers so far; please keep them coming. There are a lot of great perspectives here, but I think many are good explanations/slogans for ourselves after we've internalized the concept. I'm looking for the detailed contexts and circumstances when it dawned on you. For example: I only somewhat understood pointers syntactically in C. I heard two of my friends explaining pointers to another friend, who asked why a struct was passed with a pointer. The first friend talked about how it needed to be referenced and modified, but it was just a short comment from the other friend where it hit me: "It's also more efficient." Passing 4 bytes instead of 16 bytes was the final conceptual shift I needed.

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• CodePlex Daily Summary for Thursday, August 30, 2012

  CodePlex Daily Summary for Thursday, August 30, 2012Popular ReleasesCoevery - Free CRM: Coevery 1.0: This is the first alpha release of Coevery.ExpressProfiler: Initial release of ExpressProfiler v1.2: This is initial release of ExpressProfilerNabu Library: 2012-08-29, 14: .Net Framework 4.0, .Net Framework 4.5 Debug and Release builds.Math.NET Numerics: Math.NET Numerics v2.2.1: Major linear algebra rework since v2.1, now available on Codeplex as well (previous versions were only available via NuGet). Since v2.2.0: Student-T density more robust for very large degrees of freedom Sparse Kronecker product much more efficient (now leverages sparsity) Direct access to raw matrix storage implementations for advanced extensibility Now also separate package for signed core library with a strong name (we dropped strong names in v2.2.0) Also available as NuGet packages...Microsoft SQL Server Product Samples: Database: AdventureWorks Databases – 2012, 2008R2 and 2008: About this release This release consolidates AdventureWorks databases for SQL Server 2012, 2008R2 and 2008 versions to one page. Each zip file contains an mdf database file and ldf log file. This should make it easier to find and download AdventureWorks databases since all OLTP versions are on one page. There are no database schema changes. For each release of the product, there is a light-weight and full version of the AdventureWorks sample database. The light-weight version is denoted by ...ImageServer: v1.1: This is the first version releasedChristoc's DotNetNuke Module Development Template: DotNetNuke Project Templates V1.1 for VS2012: This release is specifically for Visual Studio 2012 Support, distributed through the Visual Studio Extensions gallery at http://visualstudiogallery.msdn.microsoft.com/ After you build in Release mode the installable packages (source/install) can be found in the INSTALL folder now, within your module's folder, not the packages folder anymore Check out the blog post for all of the details about this release. http://www.dotnetnuke.com/Resources/Blogs/EntryId/3471/New-Visual-Studio-2012-Projec...Home Access Plus+: v8.0: v8.0828.1800 RELEASE CHANGED TO BETA Any issues, please log them on http://www.edugeek.net/forums/home-access-plus/ This is full release, NO upgrade ZIP will be provided as most files require replacing. To upgrade from a previous version, delete everything but your AppData folder, extract all but the AppData folder and run your HAP+ install Documentation is supplied in the Web Zip The Quota Services require executing a script to register the service, this can be found in there install di...Phalanger - The PHP Language Compiler for the .NET Framework: 3.0.0.3406 (September 2012): New features: Extended ReflectionClass libxml error handling, constants DateTime::modify(), DateTime::getOffset() TreatWarningsAsErrors MSBuild option OnlyPrecompiledCode configuration option; allows to use only compiled code Fixes: ArgsAware exception fix accessing .NET properties bug fix ASP.NET session handler fix for OutOfProc mode DateTime methods (WordPress posting fix) Phalanger Tools for Visual Studio: Visual Studio 2010 & 2012 New debugger engine, PHP-like debugging ...NougakuDoCompanion: v1.1.0: Add temp folder of local resource, Resize local resource. Change launch ruby commnadline args from rack to bundle. 1.NougakuDoCompanion v1.1.0 cspkg.zip - cspkg and ServiceConfiguration.xml (small , medium, large, extra large vm) - include NougakudoSetupTool.exe and readme.txt 2.NougakuDoCompanion v1.1.0.zip - Source code. include NougakudoSetupTool.exe - include activerecord-sqlserver-adapter patch in paches folder. 3.Depends tools. - Windows Azure SDK for .NET June 2012(1.7SP1) - Windows ...WatchersNET CKEditor™ Provider for DotNetNuke®: CKEditor Provider 1.14.06: Whats New Added CKEditor 3.6.4 oEmbed Plugin can now handle short urls changes The Template File can now parsed from an xml file instead of js (More Info...) Style Sets can now parsed from an xml file instead of js (More Info...) Fixed Showing wrong Pages in Child Portal in the Link Dialog Fixed Urls in dnnpages Plugin Fixed Issue #6969 WordCount Plugin Fixed Issue #6973 File-Browser: Fixed Deleting of Files File-Browser: Improved loading time File-Browser: Improved the loa...MabiCommerce: MabiCommerce 1.0.1: What's NewSetup now creates shortcuts Fix spelling errors Minor enhancement to the Map window.VFPX: Data Explorer 3: This release is the first alpha release for DX3. Even though great care has been taken, the project manager highly recommends you work with test data and you regularly back up the DataExplorer.DBF found in your HOME(7) folder. New features are documented on the project home page. IMPORTANT Once installed, make sure to go to the Data Explorer Options page, click the Restore to Default button. This brings up a dialog asking if you want to maintain connections and customizations that were done...ScintillaNET: ScintillaNET 2.5.2: This release has been built from the 2.5 branch. Version 2.5.2 is functionally identical to the 2.5.1 release but also includes the XML documentation comments file generated by Visual Studio. It is not 100% comprehensive but it will give you Visual Studio IntelliSense for a large part of the API. Just make sure the ScintillaNET.xml file is in the same folder as the ScintillaNET.dll reference you're using in your projects. (The XML file does not need to be distributed with your application)....Facebook Web Parts for SharePoint 2010: Version 1.0.1 - WSP: SharePoint 2010 solution (WSP) Resolved a bug from Version 1.0 - WSP where user profile names would not properly update.Contactor: GSMContactorProgram V1.0 - Source Code: This is the source code for the program, For Visual Studio 2012 RCTouchInjector: TouchInjector 1.1: Version 1.1: fixed a bug with the autorun optionWinRT XAML Toolkit: WinRT XAML Toolkit - 1.2.0: WinRT XAML Toolkit based on the Windows 8 RTM SDK. Download the latest source from the SOURCE CODE page. For compiled version use NuGet. You can add it to your project in Visual Studio by going to View/Other Windows/Package Manager Console and entering: PM> Install-Package winrtxamltoolkit Features AsyncUI extensions Controls and control extensions Converters Debugging helpers Imaging IO helpers VisualTree helpers Samples Recent changes NOTE: Namespace changes DebugConsol...BlackJumboDog: Ver5.7.1: 2012.08.25 Ver5.7.1 (1)?????·?????LING?????????????? (2)SMTP???（????）????、?????\?????????????????????Visual Studio Team Foundation Server Branching and Merging Guide: v2 - Visual Studio 2012: Welcome to the Branching and Merging Guide Quality-Bar Details Documentation has been reviewed by Visual Studio ALM Rangers Documentation has been through an independent technical review Documentation has been reviewed by the quality and recording team All critical bugs have been resolved Known Issues / Bugs Spelling, grammar and content revisions are in progress. Hotfix will be published.New ProjectsAd Specific Redirect Generator: Ad Specific Redirect Generatorargsv, command line argument processors: Two libraries to process command line options, one(argsvCPython) is written for Python applications and other one(the argsvCPP) is for C++ applications.AutomationML Export Import Mapper: This Tool supports the mapping between SystemUnitClass-Libraries, used to exchange data in the AutomationML Format between Exporters and Importers.BioPathSearch: Tool for probibalistic biochemical networks construction from input substrete to required product based on information from KEGG databasebuidingapp: i am buiding app but i not sure public because i don't code finish. then i upload code and pulish my application,. thank you for reading mynote. see you next tiCatalogo de Empresas y Productos: Este es el catalogo de empresas y productos asociadas a la produccion agricola en CRclarktestcodeplex: test codeplexDatabase Clean-up Engine - DataWashroom: Database Clean-up Rules EngineEdEx: edexExpense Management System: Expense Management SystemFinger Tracking with Kinect SDK for XBOX: This project explained step by step how to perform finger and hand tracking with the Kinect for XBOX with the official Kinect SDK.Flower - Workflow Engine: Flower is a simple yet powerful workflow engine allowing to develop workflows in C#.Grid: Copyright 2011 Badkid development. All rights reserved. Play Grid the the retro style arcade puzzle game. Join lines between the gids to create boxes to get pHeadSprings Assignment: A program to create custom tokens using class FizzBuzz programming. Ice Scream: IcescreamiD Commerce + Logistics: iD Commerce + Logistics is a company based outside of Chicago, Illinois specializing in fulfillment solutions and custom development.Mido: Mido is a simple utility that adds text or images watermarks to your photos, images and pictures.MLSTest: MLSTest is a Windows based software for the analysis of Multilocus Sequence Data for euckaryotic organisms My Project Foundation Library: A foundation library for asp.net web project, including easy-to-use data access layer and other utility code.MyTestProject001: ?????codeplex，??????????。MyTestProject2: My Test projectNEF - Native Extensibility Framework: NEF is an open source IoC extensibility framework targetting C++. It is modeled after the more useful features of MEF in C#.RazorSpy: A simple toy/tool for exploring the output of the Razor Parser for a particular document.Relay Command for WinRT: A simple RelayCommand for WinRT (sans and entire MVVM framework).Rocca. Store: Document storage with email capabilitiesScrabble Nights: Scrabble is a word game in which two to four players score points by forming words from individual lettered tiles on a game board marked with a 15-by-15 gridSlFrame: SlFrameSmart Data Access layer: WE ARE USING SMART DATA ACCESS LAYER MEANS ITS TIME TO FORGET ABOUT SYSTEM.DATA.SQLCLIENT NAMESPACE.SportSlot: This project allows you to search for available sport venuesSwitcher 2012: Allows for fast switching between source and header file in Visual Studio 2012testddtfs2908201201: satime tracking: coming soonTradePlatform.NET: TradePlatform.NET is addition to MetaTrader 4 client terminal which extends trading experience, MQL language and provides .NET world communication bridge.WaMa-SkyDriveClient: Project Description WaMa-SkyDriveClient is a Windows Skydrive-client, with Live authentication.Web Optimization: The ASP.NET Web optimization framework provides services to improve the performance of your ASP.NET Web applications.Web Pocket: Web tool for rapid application development of mobile software WinRT Toolkit: The purpose of WinRT Toolkit is to provide efficient and developer friendly instruments (API / Components...).Xcel Directory Service: Xcel Directory Service is an Excel 2010 add-in used to retrieve data from Active Directory using an import utility and user defined functions.zhangfacai: this project is based on ASP.NET MVC 4 and HTML5. It's a website to integrate public web services like amazon, live, facebook, etc. By using these services, mak

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• New Exam Prep Seminar for Program With PL/SQL!

  - by Harold Green

  We're happy to announce the availability of a brand new Exam Prep Seminar titled Certification Exam Prep Seminar: Program with PL/SQL. This new Exam Prep Seminar is available as a standalone product. For those of you preparing for the Oracle PL/SQL Developer Certified Associate certification, this seminar is a great value and and an excellent way to gain valuable insight from one of Oracle University's top Database instructors. This Exam Prep Seminar will accelerate your preparation, make your prep time more efficient and give you insight to the breadth and depth of the certification exam. This type of exam preparation has traditionally only been available at the Oracle OpenWorld conference, but is now available to anyone through this new format. Of course with online video, you can now start, stop, rewind, and review as needed! Also note that because this seminar is in the Oracle Training On Demand format, you can also watch it on your your iPad through Oracle University's new free iPad app. QUICK LINKS SEMINAR: Certification Exam Prep Seminar: Program with PL/SQL APPLICABLE EXAMS: 1Z0-147: Program With PL/SQL 1Z0-144:  Oracle Database 11g: Program with PL/SQL CERTIFICATION: Oracle PL/SQL Developer Certified Associate

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• what is the Web development process efficiency judgment criteria

  - by Ahmed safan

  I'm working as a web developer and I want to be able to determine if I'm efficient. Does this include the how long it take to accomplish tasks such as: Server side code for the site logic with one language or multiple php,asp,asp.net. Client side code like javascript with jquery for ajax, menus and other interactivity Page layout, html, css (color, fonts (but I have no artistic sense!)) The needs of the site and how it will work (planning) How can i judge how long it will take to complete a website? The site has CMS for adding and editing news, products, articles on the experience of the company. Also, they can edit team work, add Recreational Activities and a logo gallery with compressed psd download, and send messages to cpanel and to email. You are starting from scratch except JQuery and PHPmailer. How can I estimate how long the job will take, and how can I calculate the required time to finish any new projects? I'm so sorry for many scattered questions, but I'm in my first experiment and I want to take benefits from the great experience of those who have it.

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• PASS Business Intelligence Virtual Chapter Upcoming Sessions (November 2013)

  - by Sergio Govoni

  Let me point out the upcoming live events, dedicated to Business Intelligence with SQL Server, that PASS Business Intelligence Virtual Chapter has scheduled for November 2013. The "Accidental Business Intelligence Project Manager"Date: Thursday 7th November - 8:00 PM GMT / 3:00 PM EST / Noon PSTSpeaker: Jen StirrupURL: https://attendee.gotowebinar.com/register/5018337449405969666 You've watched the Apprentice with Donald Trump and Lord Alan Sugar. You know that the Project Manager is usually the one gets firedYou've heard that Business Intelligence projects are prone to failureYou know that a quick Bing search for "why do Business Intelligence projects fail?" produces a search result of 25 million hits!Despite all this… you're now Business Intelligence Project Manager – now what do you do?In this session, Jen will provide a "sparks from the anvil" series of steps and working practices in Business Intelligence Project Management. What about waterfall vs agile? What is a Gantt chart anyway? Is Microsoft Project your friend or a problematic aspect of being a BI PM? Jen will give you some ideas and insights that will help you set your BI project right: assess priorities, avoid conflict, empower the BI team and generally deliver the Business Intelligence project successfully! Dimensional Modelling Design Patterns: Beyond BasicsDate: Tuesday 12th November - Noon AEDT / 1:00 AM GMT / Monday 11th November 5:00 PM PSTSpeaker: Jason Horner, Josh Fennessy and friendsURL: https://attendee.gotowebinar.com/register/852881628115426561 This session will provide a deeper dive into the art of dimensional modeling. We will look at the different types of fact tables and dimension tables, how and when to use them. We will also some approaches to creating rich hierarchies that make reporting a snap. This session promises to be very interactive and engaging, bring your toughest Dimensional Modeling quandaries. Data Vault Data Warehouse ArchitectureDate: Tuesday 19th November - 4:00 PM PST / 7 PM EST / Wednesday 20th November 11:00 PM AEDTSpeaker: Jeff Renz and Leslie WeedURL: https://attendee.gotowebinar.com/register/1571569707028142849 Data vault is a compelling architecture for an enterprise data warehouse using SQL Server 2012. A well designed data vault data warehouse facilitates fast, efficient and maintainable data integration across business systems. In this session Leslie and I will review the basics about enterprise data warehouse design, introduce you to the data vault architecture and discuss how you can leverage new features of SQL Server 2012 help make your data warehouse solution provide maximum value to your users. 

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