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• EPM System Standard Deployment Video Series

  - by Paul Anderson -Oracle

  (in via Jan) A four-part video series on deploying Enterprise Performance Management (EPM) System Products has been made available within the Oracle EPMWebcasts YouTube channel. This video series is designed for system administrators. It provides an overview of how to deploy EPM System products using the standard deployment methodology. Deploying EPM System Using Standard Deployment video series: Part 1 - Overview [3:12] Describes the EPM standard deployment and details each of the videos in the series. Part 2 - Preparing for Deployment [3:41] Discusses how to prepare for an EPM standard deployment. Part 3 - Installing and Configuring an Initial Instance of EPM System [4:11] Outlines the steps to install and configure an initial instance of EPM System components.. Part 4 - Scaling Out and Installing EPM System Clients [4:00] Provides an overview of the steps to scale out EPM System components and install EPM System client software. More information is available within the PDF document: EPM System Standard Deployment Guide 11.1.2.3 To view and and access other Oracle EPM Webcast videos visit: Oracle EPM Webcasts YouTube Channel To view and download all of the EPM product documentation visit the Oracle Technology Network (OTN) EPM Documentation Library. In addition to the Oracle EPM Webcasts YouTube channel these videos along with other EPM related product videos and information are available in the Oracle Learning Library (OLL) - visit: Oracle Learning Library - EPM Consolidation and Planning Videos

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• Social Engineering approach to collecting from deadbeat ebay winners

  - by Malcolm Anderson

  You just sold something on e-bay and now the winner won't pay up.  What do you do?  I'm not sure what the legality of this kind of Social Engineering hack is, but I believe you've got to give it points for elegance.   Here's the link to the lifehacker.com post (I can't find the original Reddit post.) Reddit user "BadgerMatt" (we'll call him Matt for short) recently posted a story about how he tried to sell tickets to a sporting event on eBay, but when the auction was won the winning bidder backed out of the deal. In some cases this is mainly an inconvenience and you can re-list the item, but Matt was selling tickets to a sporting event and no longer had the time to do that. With the losing bidders uninterested in the tickets, he was going to end up stuck with tickets he couldn't use and a deadbeat bidder who was unwilling to honor their contract. Rather than give up, Matt decided to trick her into paying: I created a new eBay account, "Payback" we'll call it, and sent her a message: "Hi there, I noticed you won an auction for 4 [sporting event] tickets. I meant to bid on these but couldn't get to a computer. I wanted to take my son and dad and would be willing to give you $1,000 for the tickets. I imagine that you've already made plans to attend, but I figured it was worth a shot." The woman agreed, but for $1,100. She paid for the auction, received the tickets, and then Matt (of course) never re-purchased them. Needless to say, the woman was angry. Perhaps it was the wrong thing for the right reasons, but I'm mostly jealous I never thought of it back when I still sold things on eBay.

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• USB install from second internal hard drive in a MacBook Pro

  - by aaron.anderson

  I am trying to install Ubuntu (among others) on a second internal hard drive on my MacBook Pro. I have an 80 GB internal SSD with OS X on it, along with a 750 GB internal HD with a few partitions, one of which being for Ubuntu. I currently have rEFInd installed for switching between the OS's. I was wondering how one would go about installing Ubuntu from the USB install stick. I have followed the instructions on creating a bootable USB. Once this is bootable, could I just hold the Option key on startup, and it should appear in the menu? Or am I missing something?

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• Are CQRS/DDD/Event Sourcing and REST compatible?

  - by Robin Green

  REST seems to promote the idea of a canonical URL for a resource, and PUTing/POSTing back a modified representation of that resource in order to change it. However, with CQRS - Command Query Responsibility Segregation - one can theoretically have a completely different "API" for reading and for writing, which seems to conflict with the REST ideal of one URL for a resource, and no RPC-style "verbs inside the request body". DDD and Event Sourcing sometimes go together with CQRS, which is why I mention them in this question. So, can CQRS be used together with REST? Or is it against the REST way of doing things? What about DDD? And Event Sourcing? Can they be used with REST?

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• Box2d too much for Circle/Circle collision detection?

  - by Joey Green

  I'm using cocos2d to program a game and am using box2d for collision detection. Everything in my game is a circle and for some reason I'm having a problem with some times things are not being detected as a collision when they should be. I'm thinking of rolling up my own collision detection since I don't think it would be too hard. Questions are: Would this approach work for collision detection between circles? a. get radius of circle A and circle B. b. get distance of the center of circle A and circle B c. if the distance is greater than or equal to the sum of circle A radius and circle B radius then we have a hit Should box2d be used for such simple collision detection? There are no physics in this game.

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• Cocos2d: Changing b2Body x val every frame causes jitter

  - by Joey Green

  So, I have a jumping mechanism similar to what you would see in doodle jump where character jumps and you use the accelerometer to make character change direction left or right. I have a player object with position and a box2d b2Body with position. I'm changing the player X position via the accelerometer and the Y position according to box2d. pseudocode for this is like so -----accelerometer acceleration------ player.position = new X -----world update--------- physicsWorld-step() //this will get me the new Y according to the physics similation //so we keep the bodys Y value but change x to new X according to accelerometer data playerPhysicsBody.position = new pos(player.position.x, keepYval) player.position = playerPhysicsBody.position Now this is simplifying my code, but I'm doing the position conversion back and forth via mult or divide by PTM_. Well, I'm getting a weird jitter effect after I get big jump in acceleration data. So, my questions are: 1) Is this the right approach to have the accelerometer control the x pos and box2d control the y pos and just sync everthing up every frame? 2) Is there some issue with updating a b2body x position every frame? 3) Any idea what might be creating this jitter effect? I've collecting some data while running the game. Pre-body is before I set the x value on the b2Body in my update method after I world-step(). Post of course is afterwards. As you can see there is definitively a pattern. 012-06-19 08:14:13.118 Game[1073:707] pre-body pos 5.518720~24.362963 2012-06-19 08:14:13.120 Game[1073:707] post-body pos 5.060156~24.362963 2012-06-19 08:14:13.131 Game[1073:707] player velocity x: -31.833529 2012-06-19 08:14:13.133 Game[1073:707] delta 0.016669 2012-06-19 08:14:13.135 Game[1073:707] pre-body pos 5.060156~24.689455 2012-06-19 08:14:13.137 Game[1073:707] post-body pos 5.502138~24.689455 2012-06-19 08:14:13.148 Game[1073:707] player velocity x: -31.833529 2012-06-19 08:14:13.150 Game[1073:707] delta 0.016667 2012-06-19 08:14:13.151 Game[1073:707] pre-body pos 5.502138~25.006948 2012-06-19 08:14:13.153 Game[1073:707] post-body pos 5.043575~25.006948 2012-06-19 08:14:13.165 Game[1073:707] player velocity x: -31.833529 2012-06-19 08:14:13.167 Game[1073:707] delta 0.016644 2012-06-19 08:14:13.169 Game[1073:707] pre-body pos 5.043575~25.315441 2012-06-19 08:14:13.170 Game[1073:707] post-body pos 5.485580~25.315441 2012-06-19 08:14:13.180 Game[1073:707] player velocity x: -31.833529 2012-06-19 08:14:13.182 Game[1073:707] delta 0.016895 2012-06-19 08:14:13.185 Game[1073:707] pre-body pos 5.485580~25.614935 2012-06-19 08:14:13.188 Game[1073:707] post-body pos 5.026768~25.614935 2012-06-19 08:14:13.198 Game[1073:707] player velocity x: -31.833529 2012-06-19 08:14:13.199 Game[1073:707] delta 0.016454 2012-06-19 08:14:13.207 Game[1073:707] pre-body pos 5.026768~25.905428 2012-06-19 08:14:13.211 Game[1073:707] post-body pos 5.469213~25.905428 2012-06-19 08:14:13.217 Game[1073:707] acceleration x -0.137421 2012-06-19 08:14:13.223 Game[1073:707] player velocity x: -65.022644 2012-06-19 08:14:13.229 Game[1073:707] delta 0.016603

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• Software Architecture and Design vs Psychology of HCI class

  - by Joey Green

  I have two classes to choose from and I'm wanting to get an opinion from the more experienced game devs which might be better for someone who wants to be an indie game dev. The first is a Software Architecture and Design course and the second is a course titled Psychology of HCI. I've previously have taken a Software Design course that was focused only on design patterns. I've also taken an Introduction to HCI course. Software Architecture and Design Description Topics include software architectures, methodologies, model representations, component-based design ,patterns,frameworks, CASE-based desgins, and case studies. Psychology of HCI Description Exploration of psychological factors that interact with computer interface usablilty. Interface design techniques and usability evaluation methods are emphasized. I know I would find both interesting, but my concern is really which one might be easier to pick up on my own. I know HCI is relevant to game dev, but am un-sure if the topics in the Software Architecture class would be more for big software projects that go beyond the scope of games. Also, I'm not able to take both because the overlap.

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• Spreadsheets in Game Design?

  - by Joey Green

  There have been two instances from the past two weeks that I've heard from well known successful game developers that they use spreadsheets when designing games. The first being David Whatley in this GDCVault video: http://gdcvault.com/play/1012372/From-Zero-to-Time-Magazine The second being the guys that do Walled Garden Weekly: http://walledgardenweekly.com/ David said he models everything out and uses excel models to see how everything plays out. What on earth is he talking about? Is it seeing how the game mechanics react to each other? Is there somewhere where I can learn more about how to do this? Thanks

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• Oracle Certification at OpenWorld + JavaOne 2012 [VIDEO]

  - by Harold Green

  Oracle Certification will again be at this year's Oracle OpenWorld and JavaOne conferences in San Francisco. We'll have two locations - the Oracle Certification Lounge at OpenWorld, and the Java Certification Zone at JavaOne. Watch this quick video (1:46) to learn more about these, Oracle University pre-conference training, some mini-sessions on several certification topics, and previews of our new Exam Preparation Seminars. ORACLE CERTIFICATION PROGRAM LOUNGE Location: Moscone South, Mezzanine, Room 250 Hours: Monday, 9:00 a.m.–5:00 p.m. Tuesday, 9:00 a.m.–5:00 p.m. Wednesday, 9:00 a.m.–5:00 p.m. Thursday, 9:00 a.m.–1:00 p.m. JAVA CERTIFICATION ZONE Location: The Zone/Taylor Street Café Hours: Sunday, 7:00 p.m.–9:00 p.m. Monday, 11:00 a.m.–6:00 p.m. Tuesday, 11:00 a.m.–6:This i00 p.m. Wednesday, 11:00 a.m.–6:00 p.m. Thursday, 11:00 a.m.–2:00 p.m. CERTIFICATION SESSIONS Monday, 1:00 p.m - JavaOne (Java Certification Zone) Monday, 3:00 p.m - Oracle OpenWorld (Oracle Certification Lounge) QUICK LINKS: Oracle OpenWorld Certification Lounge Details Oracle University at Oracle OpenWorld 2012 (Pre-Conference Training) Java University at JavaOne 2012 (Pre-Conference Training) Self Test Software Oracle Press Oracle Certification on Twitter: https://twitter.com/oraclecert Oracle Certification on Facebook: facebook.com/OracleCertification

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• Test Driven Development with vxml

  - by Malcolm Anderson

  It's been 3 years since I did any coding and am starting back up with Java using netBeans and glassfish.  Right off the bat I noticed two things about Java's ease of use.  The java ide (netBeans) has finally caught up with visual studio, and jUnit, has finally caught up with nUnit.  netBeans intellisense exists and I don't have to subclass everything in jUnit.    Now on to the point of this very short post ( request)   I'm trying to figure out how to do test driven development with vxml and have not found anythnig yet.  I've done my google search, but unfortunately, TDD in IVR land has something to do with helping the hearing impared. I've found a vxml simulator or two, but none of their marketing is getting my hopes up.    My request - if you have done any agile engineering work with vxml, contact me, I need to pick your brain and bring some ideas back to my team.   Thanks in advance.

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• Mobile Apps for Hospitals?

  - by Joey Green

  I currently work for a pretty large hospital and have been dabbling in iPhone development for a couple years. The CEO is wanting to get together a group to see what mobile technology we could create. I was contacted to be the main developer. I wanted to gather some ideas of what kind of mobile apps people have seen deployed in hospitals. Not necessarily medical apps that you can get on the app store, but rather apps built specifically for a hospital. Any ideas? If this is not the appropriate forum for a question like this, can someone point me to a forum where it would be appropriate?

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• Cocos2d: Tongue effect like in Munch Time

  - by Joey Green

  I'm wanting to do a tongue effect for my character like the one in Munch Time( shown in pic ). The player does some action and his tongue attaches to the nearest platform. I'm thinking this is simply a get distance to platform and keep player at that distance as he moves back and forth giving him the swinging effect. For the drawing, I'm wanting the same effect where the tongue sprite is the skinniest in the middle of the distance between the character and platform. I know how to do this in a shader( I'm using cocos2d v2 btw ), but I'm wondering if there is some built-in functionality to allow me to do this. First, is this the right approach using distance? Second, is their an easy way to do the tongue sprite effect without a shader? Third, I'm wanting to have the player spring up at will in the direction of the platform. I'm using Box2D. Would there be a way to do this using force's or would it be easier to write my own code?

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• Do employers hiring for Software jobs care about the classes you took in CS masters program?

  - by Joey Green

  I'm torn between two classes right now for next semester( Software Design and Advanced Computer Graphics ). I would enjoy Advanced Computer Graphics more, but I feel the software design class would help me when approaching anything I ever build for the rest of my career. I feel though I could just buy the book( I already have both books actually ) of the Software Design class and go through it, if I wanted. But think it would be a bit tougher to pick up the Advanced Computer Graphics class on my own. So do employers look at the graduate classes you've taken to decide if you would be a good fit or not? I think more importantly what I'm wanting to know is if I wanted to work for a high-end software company like Apple or Google would a company like that be more impressed by someone that took software engineering classes or hardcore CS classes?

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• How can I use SSMTP to send through Gmail and accept relay requests from another machine?

  - by Kris Anderson

  I'm running sSMTP on Ubuntu 12.04 and 14.04 and it's sending emails perfectly through Gmail. However, I'm also running an OmniOS operating system (a spinoff of Solaris) and it doesn't handle TLS which means it can't connect and send through gmail. What I'd like to do is point the OmniOS machine to one of my local Ubuntu machines, and have the Ubuntu machine relay all of the email for the OmniOS machine. How can I accomplish this?

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• Linking Libraries in iOS?

  - by Joey Green

  This is probably a totally noob question but I have missing links in my mind when thinking about linking libraries in iOS. I usually just add a new library that's been cross compiled and set the build and linker paths without really know what I'm doing. I'm hoping someone can help me fill in some gaps. Let's take the OpenCV library for instance. I have this totally working btw because of a really well written tutorial( http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en ), but I'm just wanting to know what is exactly going on. What I'm thinking is happening is that when I build OpenCV for iOS is that your creating object code that gets placed in the .a files. This object code is just the implementation files( .m ) compiled. One reason you would want to do this is to make it hard to see the source code and so that you don't have to compile that source code every time. The .h files won't be put in the library ( .a ). You include the .h in your source files and these header files communicate with the object code library ( .a ) in some way. You also have to include the header files for your library in the Build Path and the Library itself in the Linker Path. So, is the way I view linking libraries correct? If , not can someone correct me on this ?

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• Which data structure should I use for dynamically generated platforms?

  - by Joey Green

  I'm creating a platform type of game with various types of platforms. Platforms that move, shake, rotate, etc. Multiple types and multiple of each type can be on the screen at once. The platforms will be procedural generated. I'm trying to figure out which of the following would be a better platform system: Pre-allocate all platforms when the scene loads, storing each platform type into different platform type arrays( i.e. regPlatformArray ), and just getting one when I need one. The other option is to allocate and load what I need when my code needs it. The problem with 1 is keeping up with the indices that are in use on screen and which aren't. The problem with 2 is I'm having a hard time wrapping my head around how I would store these platforms so that I can call the update/draw methods on them and managing that data structure that holds them. The data structure would constantly be growing and shrinking. It seems there could be too much complexity. I'm using the cocos2d iPhone game engine. Anyways, which option would be best or is there a better option?

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• When to roll your own game engine?

  - by Joey Green

  I've been a software developer for 5 years now and wanting to get into iOS game development. I've played around with the iOS SDK for about 2 years now, attending cocoaheads meetings and feel I have a good grasp on objective-c/cocoa and even c/c++. I have a game idea and know that I will use Box2D but I'm wondering if I should use cocos2D or not. The main reasons are: I may want to do things graphics wise that aren't available in cocos2d. If I roll my own game engine I'll have more control. Of course the main reason for using a already existing game engine is the time it saves and it makes the hard stuff easier, but for someone who has the technical chops to roll his own does it make sense?

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• Coding Dynamic Events?

  - by Joey Green

  I have no idea what the title of this question should be so bare with me. My game has turns. On a turn a player does something and this can result in a random number of explosions that occur at different times. I know when the explosions are done. I need to know when ALL are done and then do some other action. Also, each explosion is the same amount of time, say 3 seconds.. Right now I'm thinking of using a counter to hold how many explosions are happening. Then once the explosion is finished decrement this counter. Once the counter is zero, do my action. This idea is inspired by objective-c memory management btw. Anyways, does this sound like a good approach or would there be another way. An alternative might be to figure out the explosion who happened last and let it be responsible for calling this subsequent action. I'm asking mostly, because I haven't done this before and am trying to figure out if there are bugs that may occur that I'm not foreseeing.

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• What is the best way to learn Cocos2D?

  - by Joey Green

  I've messed around with iPhone development for a couple years now. I've done some contract work. I want to get into Cocos2D to develop a game idea that I have. I was wondering what might be the best/quickest way to get up in running in cocos2d? I've thought about a book, but I wondering if that is needed? I'm the type of guy that just wants to know what everything does and is suppose to be used for. Any ideas?

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• Patch Set Update: Hyperion Essbase 11.1.2.3.502

  - by Paul Anderson -Oracle

  A Patch Set Update (PSU) for Oracle Hyperion Essbase 11.1.2.3.x . The PSU downloads are from the My Oracle Support | Patches & Updates section. Hyperion Essbase Server 11.1.2.3.502 Patch 18950479: Essbase Server Hyperion Essbase Client 11.2.3.502 Patch 18950453: Essbase RTC Patch 18950474: Essbase Client Patch 18950482: Essbase MSI Hyperion Essbase Administration Services (EAS) 11.1.2.3.502 Patch 17767626: Essbase Server Patch 17767628: Essbase Console MSI Hyperion Analytic Provider Services (APS) 11.1.2.3.502 Patch 18907738: APS Services Hyperion Essbase Studio 11.1.2.3.502 Patch 18907980: Essbase Studio Server Patch 18907987: Essbase Studio Console MSI Refer to the Readme file prior to proceeding with this PSU implementation for important information that includes a full list of the defects fixed, along with additional support information, prerequisites, details for applying patch and troubleshooting FAQ's. It is important to ensure that the requirements and support paths to this patch are met as outlined within the Readme file. The Readme file is available from the Patches & Updates download screen. To locate the latest Essbase Patch Sets and Patch Set Updates at anytime visit the My Oracle Support (MOS) Knowledge Article: Available Patch Sets and Patch Set Updates for Oracle Hyperion Essbase Doc ID 1396084.1 Why not share your experience about installing this patch ... In the MOS | Patches & Updates screen simply click the "Start a Discussion" and submit your review. The patch install reviews and other patch related information is available within the My Oracle Support Communities. Visit the Oracle Hyperion EPM sub-space: Hyperion Patch Reviews

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• Requirements Analysis in Game Development?

  - by Joey Green

  I'm a software engineering student with a focus on game development and am wondering how big of a part does requirement analysis play a part in game development? I'm asking because there is a class being offered and I could take it. It is all about requirements analysis. Here is a description: An in-depth study of current research and practice in requirements elicitation, requirements, analysis, requirements specification,requirements verification and validation, and requirements management. Would this type of knowledge be useful for an independent game developer?

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• Interesting conversation about the nature of info-wars

  - by Malcolm Anderson

  Over at Schlock Mercenary, Howard Taylor has started a facinating conversation on the nature of Info-Wars. As Howard puts it:   Somebody (I forget who) tweeted that the Wikileaks fight right now is the first infowar in history. I disagree. I think we've fought numerous infowars in the last fifteen years. And that's really what I want to see discussed in the comments. We can argue right and wrong until the eCows come 127.0.0.1 but nobody is going to walk away convinced. I want to see a list of information-age conflicts that you feel qualify as "infowar." Me, I think the RIAA vs file-sharing qualifies. My buddy Rodney suggested RBLs vs Spammers (the spammers won that one.) Somebody pointed out that the Secret Service raid on Steve Jackson Games back in the 80's might qualify.

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• Beta Soon Closing: Java SE 7 Programmer I (OCA) Exam

  - by Harold Green

  Just a reminder that you still have the next several weeks to take the beta exam for the new "Oracle Certified Associate, Java SE 7 Programmer" certification. From now through December 16th, you can take the "Java SE 7 Programmer I" exam (1Z1-803) for only $50 USD. Not only that, but because this only a single-exam certification - passing it puts you among the very first certified on the new Java SE 7 platform! You'll be happy to note that we worked hard to raise the bar for OCA as we built the Java SE 7 certification. The content that we considered to be more ‘conceptual knowledge-based' has been eliminated in the OCA level and has been replaced with far more practical content - what we often call "practitioner-level" concepts and questions. In fact, some of the topics that we previously covered at the Oracle Certified Professional (OCP) level is now covered at the OCA level. Doing this not only increases the value of the Java SE 7 OCA certification, but also has provided the opportunity for us to broaden the topics, concepts, questions covered at the OCP certification level. All of this adds up to more value and credibility to those who get certified on Java SE 7. The OCA exam doesn’t have prerequisites. But it is very important that you carefully review the test objectives on the exam page and assess your current skills and knowledge against that list to be sure that you're ready. From the exam page you can register to take the exam at a Pearson VUE testing center near you.Below are some helpful details on the certification track and exam. Again, register now - just a few weeks left at the special low beta price! QUICK LINKS: Certification Track: Oracle Certified Associate (OCA), Java SE 7 Programmer Certification Exam: Java SE 7 Programmer I (1Z1-803) Video: Coming Soon - Java SE 7 Certification Info: About Beta Exams Exam Registration: Instructions | Register Here

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• Java Certification Exams and Their Move to Pearson VUE

  - by Harold Green

  You may be aware that Oracle recently migrated all Sun-branded certification exams from Prometric to Pearson VUE. Below are answers to some frequently-asked questions that we've been getting recently: What changes to the exams should I be aware of?Only minor changes were made to the exams during the transition to Pearson VUE: Renumbering of all exams to the Oracle exam numbering structure (i.e. 1Z0...). Most exam score reports were enhanced to provide more detailed feedback. Score reports now list every exam objective for which a question (or questions) were answered incorrectly. The previous format provided only section-level performance feedback. For three Java exams, some lengthy (time-consuming) questions were removed & replaced with shorter (less time-consuming) questions. This was done in order to shorten the required exam time (to 150 minutes). Some interactive question types were removed from several Java and Solaris exams (including "matching" and "drag-and-drop" questions). The passing scores (for the exams that were revised) were statistically adjusted to make them equal to their prior passing scores, thus ensuring that the exams maintained the same level of difficulty as before. The exam objectives and the exam questions themselves did not change. Candidates should study the same material and objectives. Are there also new testing practices I should be aware of?Oracle follows a common industry practice of placing occasional un-scored questions on our certification exams. Candidates will not know which questions are unscored. At the time of this blog post, only one of the migrated exams (1Z0-898) contains unscored questions.I started the Master certification path through Prometric, and now I need to complete the requirements through Pearson VUE. Where can I get guidance on this process?Visit our Vendor Transition FAQs to find comprehensive instructions. Oracle has created several specific paths to accommodate candidates who were at at varying stages of completion of their master path when the transition occurred. Make sure to follow the specific path designed for your case, as you will need to know which exam number to select in order to submit/re-submit your requirements. QUICK LINKS Oracle Certification Blog Post: Java, Oracle Solaris, MySQL and Other Former Sun Certification Exams Now Being Delivered At Pearson VUE Oracle Certification Website: Vendor Transition Announcement

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• Fast programmatic compare of "timetable" data

  - by Brendan Green

  Consider train timetable data, where each service (or "run") has a data structure as such: public class TimeTable { public int Id {get;set;} public List<Run> Runs {get;set;} } public class Run { public List<Stop> Stops {get;set;} public int RunId {get;set;} } public class Stop { public int StationId {get;set;} public TimeSpan? StopTime {get;set;} public bool IsStop {get;set;} } We have a list of runs that operate against a particular line (the TimeTable class). Further, whilst we have a set collection of stations that are on a line, not all runs stop at all stations (that is, IsStop would be false, and StopTime would be null). Now, imagine that we have received the initial timetable, processed it, and loaded it into the above data structure. Once the initial load is complete, it is persisted into a database - the data structure is used only to load the timetable from its source and to persist it to the database. We are now receiving an updated timetable. The updated timetable may or may not have any changes to it - we don't know and are not told whether any changes are present. What I would like to do is perform a compare for each run in an efficient manner. I don't want to simply replace each run. Instead, I want to have a background task that runs periodically that downloads the updated timetable dataset, and then compares it to the current timetable. If differences are found, some action (not relevant to the question) will take place. I was initially thinking of some sort of checksum process, where I could, for example, load both runs (that is, the one from the new timetable received and the one that has been persisted to the database) into the data structure and then add up all the hour components of the StopTime, and all the minute components of the StopTime and compare the results (i.e. both the sum of Hours and sum of Minutes would be the same, and differences introduced if a stop time is changed, a stop deleted or a new stop added). Would that be a valid way to check for differences, or is there a better way to approach this problem? I can see a problem that, for example, one stop is changed to be 2 minutes earlier, and another changed to be 2 minutes later would have a net zero change. Or am I over thinking this, and would it just be simpler to brute check all stops to ensure that The updated run stops at the same stations; and Each stop is at the same time

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