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• Spotlight on an office – Utrecht

  - by Maria Sandu

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-family:"Calibri","sans-serif"; mso-ascii- mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi- mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} This time in our monthly topic, we have our spotlight on the brand new Oracle office in Utrecht, the Netherlands. About 35km south-east of Schiphol Airport and centrally located in the Netherlands, Oracle moved into the Facet building in March 2011. Facet is much more than an office building, it creates a work environment that relates to the ‘No Limits’ philosophy Oracle has in the Netherlands. “No Limits” means the building belongs to everyone. You choose the best place to work, based on the activities of that moment. To point this out, we currently have 1050 people working for Oracle Netherlands, and 623 workplaces. There is virtually no limit to where you can sit in our shiny new offices; we no longer have 'zoning', where departments own specific areas in the building, Even the Managing Director of Oracle Netherlands, does not have an office and he chooses a different working place every day. So make sure you are prepared when he is sitting next to you one day! If nobody has a fixed workplace, then you would think that finding a colleague could be tricky. Oracle uses CU (‘SeeYou’) which makes all of us easier to locate. Upon entering the building you receive a text stating where the greatest concentration of your buddies is sitting. Our internal messaging service also proves to be very valuable finding your colleagues. The heart of our building is the great RestOrant, with a very busy coffee bar. It offers an informal place for people to meet and is busy all day, not just at lunch time! The O-Bar in the atrium on the ground floor is also a very popular place to meet and drink tea or coffee and gives a breathtaking introduction to the office to any of our first time visitors. For a few minutes of relaxation during the working day, there are table tennis facilities and a Wii room on every floor! So if you are interested in joining Oracle in this Netherlands or anywhere else in EMEA, please have a look at http://campus.oracle.com for all of our latest vacancies and internships.

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• How much am I worth hourly as a software/web developer? [closed]

  - by luckysmack

  I may be starting a new job very soon as a developer for both web and desktop software. The primary languages I will be using is ASP.NET with C# with some php for existing projects(I've already had one interview which went very well). The job deals primarily in advertising. But this is my first real job in the market, I have no degrees, but have some college time(~1yr). So I am primarily self taught. They are fully aware of my skill set and lack of degrees or certificates. I applied as an entry level developer. It will be a permanent and full time/hourly position, and not a per contract job. So since it my cherry job, im not really sure what to ask for. even though im self taught im pretty confident in my skills and know what im doing fairly well. I pick up on new concepts very well and find new things fairly easy to learn. Here is a very brief summary of my skills: PHP: ~2years C#/.NET: 2 months Python: Basics only. ~1 month OOP Familiarity: Great (1 year) MVC Familiarity: Great (1 year) PHP Frameworks used: CakePHP(6 months), Yii(3 months), Lithium(3 months) CMS Familiar with: Drupal(1.5 years), Wordpress(only basics) I also have ~2yrs experience in maintaining my own VPS server and the hassles all that entails (linux/debian) Pretty much all the above will be used at this job. Although I will be using C# a vast majority of the time. I only recently started learning it but am moving along fairly rapidly and its all going smooth as butter. So what have I built? I have one proprietary site built in drupal which is used an an order log for products, inventory, and their shipments. It is also able to process payments through paypal merchant services. I have worked on a handful of other small apps used here and there I'm not able to show but which worked fairly well (all in php using frameworks though). The business does fairly well and is far from a a typical corporate type environment. It is much closer to a small development studio. And it is based out of northern California. I don't know how/what more info I can give on them. I also want this to be able to be referenced by other people possibly so I am looking for general tips and ideas to get an answer as well. I had trouble finding a reasonable range on other websites which seemed to be either way to low, or showed what a veteran developer makes. I know this is a fairly subjective question, but it is difficult to get a reasonable answer or guesstimate anywhere else. Even if only a little bit help, its much appreciated. So as for the direct question, based on all this info (did I miss anything?), how much should I ask for hourly? How much am I worth as a software developer?

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• Applying for internship

  - by Margus

  At the moment I'm thinking about applying for internship at Eesti Energia. I seem to be eligible, but before contacting them I need to learn how to compile an informative and complete CV and cover letter. I do not consider myself as shallow minded, but also I'm not sure how to convincingly justify the stand of interest and how internship will help me in my future career. Course of life Tallinna Tehnikagümnaasium 2003 - 2006 Tallinna Tehnikaülikool 2006 – 2009 Military service at Signal Batallion Tallinna Tehnikaülikool 2010 – ... I started my academic career as Computer and Systems Engineer, but as I excelled in programming classes, I changed my major to Software Engineer and taken my specialty in web applications and logic. Nowadays I mainly use Java, Mathematica and C# to solve problems. For 2 times, I have taken part in ACM International Collegiate Programming Contest, where my team won the nationals and did pretty well in Europe. Also as part of notable thing in my academic career, my team wrote the Kalah game AI, that won in University's main programming class AI tournament. My hobbies are mind games and occasional problem solving. Few years ago I also competed in International Checkers EM (requires being in top 3 in nationals) as part of cadet and junior age group - I did not come close to winning, but I exceeded about half of the players each time. In high school and gymnasium I took part and later was the captain of team, that passes regionals and made it to top 3 of nationals (and later won) in (blitz) russian checkers. That was impressive because, it was a team effort as we only had (depending on year) 2-3 strong players. Although I started programming exactly 9,5 years ago I have no work experience. Well actually thats not true, as I completed my army duty, I was hired for a year (days still counting) to be apart of communicational (emergency) infrastructure action group where I'm the teams IT specialist (it's more complicated). So I consider myself to be aware of: rough conditions, teamwork, high stress tolerance, being on time and what responsibility means. As negative things I can mention: I do not have drivers licence. Although only Estonian and English are noted as requirements, then Russian is most likely required as well and I barely understand some of it. Reasons why I want to apply there, are: I need to do at least 4-6 week traineeship and it's in the right field I have the requirements and tasks seem easy enough Company is well known and has fairly good reputation Family and friend think, that it would be acceptable place to work Myriad of options to do final thesis about open up Work place is located in the same city I live atm. At moment, I see myself having a hard time explain why I would prefer it or where I see myself in 10 years if I was offered a job there. Question I have some idea how Curriculum Vitæ should look like, or I can google for template, but I'm not sure how to write informative one. Last I did one, it looked like: picture + contact information + education. Vaguely I only remember, that cover letter should be custom tailored for each place you apply containing ...

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• Data breakpoints to find points where data gets broken

  - by raccoon_tim

  When working with a large code base, finding reasons for bizarre bugs can often be like finding a needle in a hay stack. Finding out why an object gets corrupted without no apparent reason can be quite daunting, especially when it seems to happen randomly and totally out of context. Scenario Take the following scenario as an example. You have defined the a class that contains an array of characters that is 256 characters long. You now implement a method for filling this buffer with a string passed as an argument. At this point you mistakenly expect the buffer to be 256 characters long. At some point you notice that you require another character buffer and you add that after the previous one in the class definition. You now figure that you don’t need the 256 characters that the first member can hold and you shorten that to 128 to conserve space. At this point you should start thinking that you also have to modify the method defined above to safeguard against buffer overflow. It so happens, however, that in this not so perfect world this does not cross your mind. Buffer overflow is one of the most frequent sources for errors in a piece of software and often one of the most difficult ones to detect, especially when data is read from an outside source. Many mass copy functions provided by the C run-time provide versions that have boundary checking (defined with the _s suffix) but they can not guard against hard coded buffer lengths that at some point get changed. Finding the bug Getting back to the scenario, you’re now wondering why does the second string get modified with data that makes no sense at all. Luckily, Visual Studio provides you with a tool to help you with finding just these kinds of errors. It’s called data breakpoints. To add a data breakpoint, you first run your application in debug mode or attach to it in the usual way, and then go to Debug, select New Breakpoint and New Data Breakpoint. In the popup that opens, you can type in the memory address and the amount of bytes you wish to monitor. You can also use an expression here, but it’s often difficult to come up with an expression for data in an object allocated on the heap when not in the context of a certain stack frame. There are a couple of things to note about data breakpoints, however. First of all, Visual Studio supports a maximum of four data breakpoints at any given time. Another important thing to notice is that some C run-time functions modify memory in kernel space which does not trigger the data breakpoint. For instance, calling ReadFile on a buffer that is monitored by a data breakpoint will not trigger the breakpoint. The application will now break at the address you specified it to. Often you might immediately spot the issue but the very least this feature can do is point you in the right direction in search for the real reason why the memory gets inadvertently modified. Conclusions Data breakpoints are a great feature, especially when doing a lot of low level operations where multiple locations modify the same data. With the exception of some special cases, like kernel memory modification, you can use it whenever you need to check when memory at a certain location gets changed on purpose or inadvertently.

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• Resolving collisions between dynamic game objects

  - by TheBroodian

  I've been building a 2D platformer for some time now, I'm getting to the point where I am adding dynamic objects to the stage for testing. This has prompted me to consider how I would like my character and other objects to behave when they collide. A typical staple in many 2D platformer type games is that the player takes damage upon touching an enemy, and then essentially becomes able to pass through enemies during a period of invulnerability, and at the same time, enemies are able to pass through eachother freely. I personally don't want to take this approach, it feels strange to me that the player should receive arbitrary damage for harmless contact to an enemy, despite whether the enemy is attacking or not, and I would like my enemies' interactions between each other (and my player) to be a little more organic, so to speak. In my head I sort of have this idea where a game object (player, or non player) would be able to push other game objects around by manner of 'pushing' each other out of one anothers' bounding boxes if there is an intersection, and maybe correlate the repelling force to how much their bounding boxes are intersecting. The problem I'm experiencing is I have no idea what the math might look like for something like this? I'll show what work I've done so far, it sort of works, but it's jittery, and generally not quite what I would pass in a functional game: //Clears the anti-duplicate buffer collisionRecord.Clear(); //pick a thing foreach (GameObject entity in entities) { //pick another thing foreach (GameObject subject in entities) { //check to make sure both things aren't the same thing if (!ReferenceEquals(entity, subject)) { //check to see if thing2 is in semi-near proximity to thing1 if (entity.WideProximityArea.Intersects(subject.CollisionRectangle) || entity.WideProximityArea.Contains(subject.CollisionRectangle)) { //check to see if thing2 and thing1 are colliding. if (entity.CollisionRectangle.Intersects(subject.CollisionRectangle) || entity.CollisionRectangle.Contains(subject.CollisionRectangle) || subject.CollisionRectangle.Contains(entity.CollisionRectangle)) { //check if we've already resolved their collision or not. if (!collisionRecord.ContainsKey(entity.GetHashCode())) { //more duplicate resolution checking. if (!collisionRecord.ContainsKey(subject.GetHashCode())) { //if thing1 is traveling right... if (entity.Velocity.X > 0) { //if it isn't too far to the right... if (subject.CollisionRectangle.Contains(new Microsoft.Xna.Framework.Rectangle(entity.CollisionRectangle.Right, entity.CollisionRectangle.Y, 1, entity.CollisionRectangle.Height)) || subject.CollisionRectangle.Intersects(new Microsoft.Xna.Framework.Rectangle(entity.CollisionRectangle.Right, entity.CollisionRectangle.Y, 1, entity.CollisionRectangle.Height))) { //Find how deep thing1 is intersecting thing2's collision box; float offset = entity.CollisionRectangle.Right - subject.CollisionRectangle.Left; //Move both things in opposite directions half the length of the intersection, pushing thing1 to the left, and thing2 to the right. entity.Velocities.Add(new Vector2(-(((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); subject.Velocities.Add(new Vector2((((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); } } //if thing1 is traveling left... if (entity.Velocity.X < 0) { //if thing1 isn't too far left... if (entity.CollisionRectangle.Contains(new Microsoft.Xna.Framework.Rectangle(subject.CollisionRectangle.Right, subject.CollisionRectangle.Y, 1, subject.CollisionRectangle.Height)) || entity.CollisionRectangle.Intersects(new Microsoft.Xna.Framework.Rectangle(subject.CollisionRectangle.Right, subject.CollisionRectangle.Y, 1, subject.CollisionRectangle.Height))) { //Find how deep thing1 is intersecting thing2's collision box; float offset = subject.CollisionRectangle.Right - entity.CollisionRectangle.Left; //Move both things in opposite directions half the length of the intersection, pushing thing1 to the right, and thing2 to the left. entity.Velocities.Add(new Vector2((((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); subject.Velocities.Add(new Vector2(-(((offset * 4) * (float)gameTime.ElapsedGameTime.TotalMilliseconds)), 0)); } } //Make record that thing1 and thing2 have interacted and the collision has been solved, so that if thing2 is picked next in the foreach loop, it isn't checked against thing1 a second time before the next update. collisionRecord.Add(entity.GetHashCode(), subject.GetHashCode()); } } } } } } } } One of the biggest issues with my code aside from the jitteriness is that if one character were to land on top of another character, it very suddenly and abruptly resolves the collision, whereas I would like a more subtle and gradual resolution. Any thoughts or ideas are incredibly welcome and helpful.

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• JTF Tranlsation Festival 2011

  - by user13133135

  ?????????????????????? (MT) ??????????????????????? JTF ????????????????????????????????????????????????? ???5??!???21?JTF???????? ? ??:2011?11?29?(?)9:30~20:30(??9:00) ? ??:??????????(????)?(??) ? ??:(?)?????? ??:JTF?????????? ? http://www.jtf.jp/jp/festival/festival_top.html ????????????????????????????????MT ????????????????????????????????????????????????? 90 ???!??(!?)?????????????????????????????????????????????????????????????????????????????? ????????????????? http://www.jtf.jp/jp/festival/festival_program.html#koen_04 ?????????????????????????????? English:  It's been a while since the last post... I have been working on machine translation (MT) and post editing (PE) for Japanese.  Last year was my first step in MT+PE area, and I would take this year as an advanced step.  I plan to talk over Post editing 2011 (Advanced Step) on November 27 at JTF Translation Festival.  ?5 days before application due? 21st JTF Translation Festival ? Date:Nov 29, 2011 Tuesday 9:30~20:30(Gate open: 9:00) ? Place:Arcadia Ichigaya Tokyo ? http://www.jtf.jp/jp/festival/festival_top.html In this session, I would like to expand the thought on "how to best utilize MT and PE" either from the view of Client and Translator.  I will show some examples of post editing as a guideline to know what is the best way and most effective way to do post-edit for Japanese.  Also, I will discuss what is the best practice for MT users (Client). The session lasts 90 minutes... sound a little long for me, but I want to spend more time for discussion than last year.  It would be great to exchange thought or experiences about MT and PE.  What is your concerns or problems in the daily work with MT ?  If you have some, please bring them to my session at JTF Translation Festival.  Here is my session details (Japanese): http://www.jtf.jp/jp/festival/festival_program.html#koen_04 Here is the outline of my session: What is the advantage of MT ? Does it solve all the problems about cost, resource, and quality ?  Well, it is not a magic.  So, you cannot expect all at once.  When you have a problem, there are 3 options... 1. Be patient and wait until everything is ready, 2. Run a workaround using anything available now, 3. Find out something completely new and spend time and money. This time, I will focus Option 2 - do something with what we already have.  That is, I will discuss how we can best utilize MT in our daily business.  My view is two ways: From Client point of view, and From Translator point of view Looking forward to meeting many people and exchanging thoughts and information!

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• Using Content Analytics for More Effective Engagement

  - by Kellsey Ruppel

  Using Content Analytics for More Effective Engagement: Turning High-Volume Content into Templates for Success By Mitchell Palski, Oracle WebCenter Sales Consultant Many organizations use Oracle WebCenter Portal to develop these basic types of portals: Intranet portals used for collaboration, employee self-service, and company communication Extranet portals used by customers and partners for self-service and support Team collaboration portals that allow users to share documents and content, track activity, and engage in discussions Portals are intended to provide a personalized, single point of interaction with web-based applications and information. The user experiences that a Portal is capable of displaying should be relevant to an individual user or class of users (a group or role). The components of a Portal that would vary based on a user’s identity include: Web content such as images, news articles, and on-screen instruction Social tools such as threaded discussions, polls/surveys, and blogs Document management tools to upload, download, and edit files Web applications that present data visualizations and data entry modules These collections of content, tools, and applications make up valuable workspaces. The challenge that a development team may have is defining which combinations are the most effective for its users. No one wants to create and manage a workspace that goes un-used or (even worse) that is used but is ineffective. Oracle WebCenter Portal provides you with the capabilities to not only rapidly develop variations of portals, but also identify which portals are the most effective and should be re-used throughout an enterprise. Capturing Portal AnalyticsOracle WebCenter Portal provides an analytics service that allows administrators and business users to track and analyze portal usage. These analytics are captured in the form of: Usage tracking metrics Behavior tracking User Profile Correlation The out-of-the-box task reports that come with Oracle WebCenter Portal include: WebCenter Portal Traffic Page Traffic Login Metrics Portlet Traffic Portlet Response Time Portlet Instance Traffic Portlet Instance Response Time Search Metrics Document Metrics Wiki Metrics Blog Metrics Discussion Metrics Portal Traffic Portal Response Time By determining the usage and behavior tracking metrics that are associated with specific user profiles (including groups and roles), your administrators will be able to identify the components of your solution that are the most valuable.  Your first step as an administrator should be to identify the specific pages and/or components are used the most frequently. Next, determine the user(s) or user-group(s) that are accessing those high-use elements of a portal. It is also important to determine patterns in high-usage and see if they correlate to a specific schedule. One of the goals of any development team (especially those that are following Agile methodologies) should be to develop reusable web components to minimize redundant development. Oracle WebCenter Portal provides you the tools to capture the successful workspaces that have already been developed and identified so that they can be reused for similar user demographics. Re-using Successful PortalsWhen creating a new Portal in Oracle WebCenter, developers have the option to base that portal on a template that includes: Pre-seeded data such as pages, tools, user roles, and look-and-feel assets Specific sub-sets of page-layouts, tools, and other resources to standardize what is added to a Portal’s pages Any custom components that your team creates during development cycles Once you have identified a successful workspace and its most valuable components, leverage Oracle WebCenter’s ability to turn that custom portal into a portal template. By creating a template from your already successful portal, you are empowering your enterprise by providing a starting point for future initiatives. Your new projects, new teams, and new web pages can benefit from lessons learned and adjustments that have already been made to optimize user experiences instead of starting from scratch. ***For a complete explanation of how to work with Portal Templates, be sure to read the Fusion Middleware documentation available online.

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• How can I work efficiently on a desktop sharing workflow?

  - by OSdave

  I am a freelance Magento developer, based in Spain. One of my clients is a Germany based web development company and they're asking me something I think it's impossible. OK, maybe not impossible but definitely not a preferred way of doing things. One of their clients has a Magento Entreprise installation, which is the paid (and I think proprietary) version of Magento. Their client has forbidden them to download the files from his server. My client is asking me now to study one particular module of the application in order to interact with it from a custom module I'll have to develop. As they have a read-only ssh access to their client's server, they came up with this solution: Set up a desktop/screen sharing session between one of their developer's station and mine, alongsides with a skype conversation. Their idea is that I'll say to the developer: show me file foo.php The developer will then open this foo.php file in his IDE. I'll have then to ask him to show me the bar method, the parent class, etc... Remember that it's a read-only session, so forget about putting a Zend_Debug::log() anywhere, and don't even think about a xDebug breakpoint (they don't use any kind of debugger, sic). Their client has also forbidden them to use any version control system... My first reaction when they explained to me this was (and I actually did say it outloud to them): Well, find another client. but they took it as a joke from me. I understand that in a business point of view rejecting a client is not a good practice, but I think that the condition of this assignment make it impossible to complete. At least according to my workflow. I mean, the way I work or learn a new framework/program is: download all files and copy of db on my pc create a git repository and a branch run the application locally use breakpoints use Zend_Debug::log() write the code and tests commit to git repo upload to (test/staging first if there is one, production if not) server I have agreed to try the desktop sharing session, although I think it will be a waste of time. On one hand I don't mind, they pay me for that time, but I know me and I don't like the sensation of loosing my time. On the other hand, I have other clients for whom I can work according to my workflow. I am about to say to them that I cannot (don't want to) do it. Well, I'll first try this desktop sharing session: maybe I'm wrong and it can actually work. But I like to consider myself as a professional, and I know that I don't know everything. So I try to keep an open mind and I am always willing to learn new stuff. So my questions are: Can this desktop-sharing workflow work? What should be done in order to take the most of it? Taking into account all the obstacles (geographic locations, no local, no git), is there another way for me to work on that project?

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• F# Objects &ndash; Integration with the other .Net Languages &ndash; Part 2

  - by MarkPearl

  So in part one of my posting I covered the real basics of object creation. Today I will hopefully dig a little deeper… My expert F# book brings up an interesting point – properties in F# are just syntactic sugar for method calls. This makes sense… for instance assume I had the following object with the property exposed called Firstname. type Person(Firstname : string, Lastname : string) = member v.Firstname = Firstname I could extend the Firstname property with the following code and everything would be hunky dory… type Person(Firstname : string, Lastname : string) = member v.Firstname = Console.WriteLine("Side Effect") Firstname   All that this would do is each time I use the property Firstname, I would see the side effect printed to the screen saying “Side Effect”. Member methods have a very similar look & feel to properties, in fact the only difference really is that you declare that parameters are being passed in. type Person(Firstname : string, Lastname : string) = member v.FullName(middleName) = Firstname + " " + middleName + " " + Lastname   In the code above, FullName requires the parameter middleName, and if viewed from another project in C# would show as a method and not a property. Precomputation Optimizations Okay, so something that is obvious once you think of it but that poses an interesting side effect of mutable value holders is pre-computation of results. All it is, is a slight difference in code but can result in quite a huge saving in performance. Basically pre-computation means you would not need to compute a value every time a method is called – but could perform the computation at the creation of the object (I hope I have got it right). In a way I battle to differentiate this from lazy evaluation but I will show an example to explain the principle. Let me try and show an example to illustrate the principle… assume the following F# module namespace myNamespace open System module myMod = let Add val1 val2 = Console.WriteLine("Compute") val1 + val2 type MathPrecompute(val1 : int, val2 : int) = let precomputedsum = Add val1 val2 member v.Sum = precomputedsum type MathNormalCompute(val1 : int, val2 : int) = member v.Sum = Add val1 val2 Now assume you have a C# console app that makes use of the objects with code similar to the following… using System; using myNamespace; namespace CSharpTest { class Program { static void Main(string[] args) { Console.WriteLine("Constructing Objects"); var myObj1 = new myMod.MathNormalCompute(10, 11); var myObj2 = new myMod.MathPrecompute(10, 11); Console.WriteLine(""); Console.WriteLine("Normal Compute Sum..."); Console.WriteLine(myObj1.Sum); Console.WriteLine(myObj1.Sum); Console.WriteLine(myObj1.Sum); Console.WriteLine(""); Console.WriteLine("Pre Compute Sum..."); Console.WriteLine(myObj2.Sum); Console.WriteLine(myObj2.Sum); Console.WriteLine(myObj2.Sum); Console.ReadKey(); } } } The output when running the console application would be as follows…. You will notice with the normal compute object that the system would call the Add function every time the method was called. With the Precompute object it only called the compute method when the object was created. Subtle, but something that could lead to major performance benefits. So… this post has gone off in a slight tangent but still related to F# objects.

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• Delegates: A Practical Understanding

  - by samerpaul

  It's been a while since I have written on this blog, and I'm planning on reviving it this summer, since I have more time to do so again.I've also recently started working on the iPhone platform, so I haven't been as busy in .NET as before.In either case, today's blog post applies to both C# and Objective-C, because it's more about a practical understanding of delegates than it is about code. When I was learning coding, I felt like delegates was one of the hardest things to conceptually understand, and a lot of books don't really do a good job (in my opinion) of explaining it. So here's my stab at it.A Real Life Example of DelegatesLet's say there are three of you. You, your friend, and your brother. You're each in a different room in your house so you can't hear each other, even if you shout. 1)You are playing a computer game2) Friend is building a puzzle3) Brother is nappingNow, you three are going to stay in your room but you want to be informed if anything interesting is happening to the one of you. Let's say you (playing the computer game) want to know when your brother wakes up.You could keep walking to the room, checking to see if he's napping, and then walking back to your room. But that would waste a lot of time / resources, and what if you miss when he's awake before he goes back to sleep? That would be bad.Instead, you hand him a 2-way radio that works between your room and his room. And you inform him that when he wakes up, he should press a button on the radio and say "I'm awake". You are going to be listening to that radio, waiting for him to say he's awake. This, in essence, is how a delegate works.You're creating an "object" (the radio) that allows you to listen in on an event you specify. You don't want him to send any other messages to you right now, except when he wakes up. And you want to know immediately when he does, so you can go over to his room and say hi. (the methods that are called when a delegate event fires). You're also currently specifying that only you are listening on his radio.Let's say you want your friend to come into the room at the same time as you, and do something else entirely, like fluff your brother's pillow. You will then give him an identical radio, that also hooks into your brother's radio, and inform him to wait and listen for the "i'm awake" signal.Then, when your brother wakes up, he says "I'm awake!" and both you and your friend walk into the room. You say hi, and your friend fluffs the pillow, then you both exit.Later, if you decide you don't care to say hi anymore, you turn off your radio. Now, you have no idea when your brother is awake or not, because you aren't listening anymore.So again, you are each classes in this example, and each of you have your own methods. You're playing a computer game (PlayComputerGame()), your friend is building a puzzle (BuildPuzzle()) and your brother is napping (Napping()). You create a delegate (ImAwake) that you set your brother to do, when he wakes up. You listen in on that delegate (giving yourself a radio and turning it on), and when you receive the message, you fire a new method called SayHi()). Your friend is also wired up to the same delegate (using an identical radio) and fires the method FluffPillow().Hopefully this makes sense, and helps shed some light on how delegates operate. Let me know! Feel free to drop me a line at Twitter (preferred method of contact) here: samerabousalbi

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• Hosted Monitoring

  - by Grant Fritchey

  The concept of using services to take the place of writing a lot of your own code goes way, way back in computing history. The fundamentals of the concept go back to the dawn of computing with places like IBM hosting time-shares for computing power that you could rent for short periods of time. But things really took off with the building of the Web. Now, all the growth with virtual machines, hosted machines, hosted services from vendors like Amazon and Microsoft, the need to keep all of your software locally on physical boxes is just going the way of the dodo. There will likely always be some pieces of software that you keep on machines on your property or on your person, but the concept of keeping fundamental services locally is going away. As someone put it to me once, if you were starting a business right now, would you bother setting up an Exchange server to manage your email or would you just go to one of the external mail services for everything? For most of us (who are not Exchange admins) the answer is pretty easy. With all this momentum to having external services manage more and more of the infrastructure that’s not business unique, why would you burn up a server and license instance setting up monitoring for your SQL Servers? Of course, some of you are dealing with hyper-sensitive data that might require, through law or treaty, that you lock it down and never expose it to the intertubes, but most of us are not. So, what if someone else took on the basic hassle of setting up monitoring on your systems? That’s what we’re working on here at Red Gate. Right now it’s a private test, but we’re growing it and developing it and it’ll be going to a public beta, probably (hopefully) this year. I’m running it on my machines right now. The concept is pretty simple. You put a relay on your server, poke a hole in your firewall for it, and we start monitoring your server using SQL Monitor. It’s actually shocking how easy it is to get going. You still have to adjust your alerting thresholds, but that’s a standard part of alerting. Your pain threshold and my pain threshold for any given alert may be different. But from there, we do all the heavy lifting, keeping your data online and available, providing you with access to the information about how your servers are behaving, everything. Maybe it’s just me, but I’m really excited by this. I think we’re getting to a place where we can really help the small and medium sized businesses get a monitoring solution in place, quickly and easily. All you crazy busy, and possibly accidental, DBAs and system admins finally can set up monitoring without taking all the time to configure systems, run installs, and all the rest. You just have to tweak your alerts and you’re ready to run. If you are interested in checking it out, you can apply for the closed beta through the Monitor web page.

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• Best way to process a queue in C# (PDF treatment)

  - by Bartdude

  First of all let me expose what I would like to do : I already dispose of a long-time running webapp developed in ASP.NET (C#) 2.0. In this app, users can upload standard PDF files (text+pics). The app is running in production on a Windows Server 2003 and has a dedicated database server (SQL server 2008) also running Windows Server 2003. I myself am a quite experienced web developer, but never actually programmed anything non-web (or at least nothing serious). I plan on adding a functionality to the webapp for which I would need a jpg snapshot of each page of the PDF. Creating these "thumbnails" isn't the big deal as such, I already do it inside my webapp using ghostscript. I've only done it on 1 page documents for now though, and the new functionality will need to process bigger documents. In order for this process to be transparent aswell for the admins as the final users, I would like to implement some kind of queue to delay the processing of the thumbnails. There again, no problem to create the queue, it will consist of records in a table, with enough info to find the pdf document back. Then I will need to process this queue, and that's were my interrogations start. Obviously the best solution to process it isn't an ASP script or so, so I will have to get out of my known environment. No problem, but I have no idea which direction to go. Therefore, a few questions : What should I develop ? I presumably need something that is "standby" on the server, runs when needed, then returns to idle state until further notice.Should I be looking into Windows service ? Is there another more appropriate type of project ? Depending on the first answer, what will be the approach ? Should I have somehow SQL server "tell" the program/service/... to process the queue, or should I have that program/service/... periodically check the state of the queue and treat new items. In both case, which functionality can I use ? we're not talking about hundreds of PDF a day (max 50 maybe), I can totally afford to treat the queue 1 item at a time. Can you confirm I don't have to look much further on threads and so ? (I found a lot of answers talking about threads in queue treatment, but it looks quite overkill for my needs) Maybe linked to the previous question : what about concurrent call to the program, whatever it is ? Let's suppose it is currently running, and a new record comes in the queue, what should be the behaviour ? I don't need much detailed answers and would already be happy with answers like "You can do the processing with a service, and yes it's possible to have sqlserver on machine A trigger a service start on machine B" or "You have to develop xxx and then use the scheduler to run it every xxx minutes". I don't mind reading articles and so, but I can hardly afford to spend too much time learning stuff to finally realize I went the wrong way for this project, so basically I'm trying to narrow down the scope of matters I need to investigate. Thanks for reading me, I hope I'll find some helping hands on here :-)

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• How can I change the color of the text in my iFrame? [closed]

  - by VinylScratch

  I have code here: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>Frag United Banlist</title> </head> <body> <h1>Tekkit Banlist</h1> <?php // change these things $server = "server-host"; $dbuser = "correct-user"; $dbpass = "correct-password"; $dbname = "correct-database"; mysql_connect($server, $dbuser, $dbpass); mysql_select_db($dbname); $result = mysql_query("SELECT * FROM banlist ORDER BY id DESC"); //This will display the most recent by id edit this query how you see fit. Limit, Order, ect. echo "<table width=100% border=1 cellpadding=3 cellspacing=0>"; echo "<tr style=\"font-weight:bold\"> <td>ID</td> <td>User</td> <td>Reason</td> <td>Admin/Mod</td> <td>Time</td> <td>Ban Length</td> </tr>"; while($row = mysql_fetch_assoc($result)){ if($col == "#eeeeee"){ $col = "#ffffff"; }else{ $col = "#eeeeee"; } echo "<tr bgcolor=$col>"; echo "<td>".$row['id']."</td>"; echo "<td>".$row['user']."</td>"; echo "<td>".$row['reason']."</td>"; echo "<td>".$row['admin']."</td>"; //Convert Epoch Time to Standard format $datetime = date("F j, Y, g:i a", $row['time']); echo "<td>$datetime</td>"; $dateconvert = date("F j, Y, g:i a", $row['length']); if($row['length'] == "0"){ echo "<td>None</td>"; }else{ echo "<td>$dateconvert</td>"; } echo "<td>".$row['id']."</td>"; echo "</tr>"; } echo"</table>" ?> </div> </body></html> And I am trying to make it so that when I put it in this iframe: <iframe src="http://bans.fragunited.net/" width="100%" length="100%"><p>Your browser does not support iframes.</p></iframe> But if you go to this page, fragunited.net/bans, (not bans.fragunited.net) the text is black and I want it to be white so you can actually see it. Sorry for the large amount of code, however I don't know where you have to put the code to change the color.

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• Cannot import the following keyfile: blah.pfx. The keyfile may be password protected.

  - by JasonD

  We just upgraded our Visual Studio 2008 projects to VS2010. All of our assemblies were strong signed using a Verisign code signing certificate. Since the upgrade we continuously get the following error: Cannot import the following key file: companyname.pfx. The key file may be password protected. To correct this, try to import the certificate again or manually install the certificate to the Strong Name CSP with the following key container name: VS_KEY_3E185446540E7F7A This happens on some developer machines and not others. Some methods used to fix this that worked some of the time include: re-installing the key file from Windows Explorer (right click on the PFX file and click Install) installing VS2010 on a fresh machine for the first time prompts you for the password the first time you open the project, and then it works. On machines upgraded from VS2008, you don't get this option. I've tried using the SN.EXE utility to register the key with the Strong Name CSP as the error message suggests, but whenever I run the tool with any options using the version that came with VS2010, SN.EXE just lists its command line arguments instead of doing anything. This happens regardless of what arguments I supply. Does anyone know WHY this is happening, and have clear steps to fix it? I'm about to give up on Click Once installs and Microsoft Code Signing. Thanks for any help!

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• faster implementation of sum ( for Codility test )

  - by Oscar Reyes

  How can the following simple implementation of sum be faster? private long sum( int [] a, int begin, int end ) { if( a == null ) { return 0; } long r = 0; for( int i = begin ; i < end ; i++ ) { r+= a[i]; } return r; } EDIT Background is in order. Reading latest entry on coding horror, I came to this site: http://codility.com which has this interesting programming test. Anyway, I got 60 out of 100 in my submission, and basically ( I think ) is because this implementation of sum, because those parts where I failed are the performance parts. I'm getting TIME_OUT_ERROR's So, I was wondering if an optimization in the algorithm is possible. So, no built in functions or assembly would be allowed. This my be done in C, C++, C#, Java or pretty much in any other. EDIT As usual, mmyers was right. I did profile the code and I saw most of the time was spent on that function, but I didn't understand why. So what I did was to throw away my implementation and start with a new one. This time I've got an optimal solution [ according to San Jacinto O(n) -see comments to MSN below - ] This time I've got 81% on Codility which I think is good enough. The problem is that I didn't take the 30 mins. but around 2 hrs. but I guess that leaves me still as a good programmer, for I could work on the problem until I found an optimal solution: Here's my result. I never understood what is those "combinations of..." nor how to test "extreme_first"

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• winforms databinding best practices

  - by Kaiser Soze

  Demands / problems: I would like to bind multiple properties of an entity to controls in a form. Some of which are read only from time to time (according to business logic). When using an entity that implements INotifyPropertyChanged as the DataSource, every change notification refreshes all the controls bound to that data source (easy to verify - just bind two properties to two controls and invoke a change notification on one of them, you will see that both properties are hit and reevaluated). There should be user friendly error notifications (the entity implements IDataErrorInfo). (probably using ErrorProvider) Using the entity as the DataSource of the controls leads to performance issues and makes life harder when its time for a control to be read only. I thought of creating some kind of wrapper that holds the entity and a specific property so that each control would be bound to a different DataSource. Moreover, that wrapper could hold the ReadOnly indicator for that property so the control would be bound directly to that value. The wrapper could look like this: interface IPropertyWrapper : INotifyPropertyChanged, IDataErrorInfo { object Value { get; set; } bool IsReadOnly { get; } } But this means also a different ErrorProvider for each property (property wrapper) I feel like I'm trying to reinvent the wheel... What is the 'proper' way of handling complex binding demands like these? Thanks ahead.

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• Obtaining MFC Feature Pack GUI elements in .NET WinForms

  - by Cody Gray

  The MFC Feature Pack (and VS 2010) adds out-of-the-box support for several "modern" GUI elements (such as MDI with tabbed documents, the ribbon, and a Visual Studio-style interface with docking panels). These are a boon to those of us that have to support legacy MFC-based applications and want to update their look-and-feel, and a sign that Microsoft has not completely abandoned unmanaged C++ development. However, with the push so strongly in favor of .NET, WinForms, and managed code (and for plenty of good reasons), there seems little reason to develop new applications in unmanaged C++/MFC. The question then becomes how does one obtain these GUI elements in a WinForms application. Almost all of the add-ons and libraries I have found so far cost money, and introduce additional dependencies. I don't have a budget to buy third-party libraries, and the controls provided by Microsoft in MFC for free seem sufficient for our needs. But I still have reservations about learning MFC to develop a new application. Not only does the investment in time seem significant (by all accounts, MFC seems particularly difficult to learn, even for experienced .NET developers--although I am willing to try), but the question of MFC's lifespan is raised as well. Certainly, given the millions of lines of code and existing apps written in native C++, it will be around for some time, but the handwriting seems to be on the wall, so to speak, that it's no longer Microsoft's touted development platform. It seems like these features should be available by now in WinForms without the need for third-party add-ons, or devoting a lot of time and resources to custom-drawing EVERYTHING. Am I just missing something? I find very little online that compares these new features of MFC to what is available in WinForms, mainly because most everything written on MFC pre-dated its most recent update, before which it looked admitted "dated," and with its other flaws, was hardly an appealing platform for new development. With the very recent release of VS 2010, we have a while to wait before WinForms gets updated again. What routes are you guys taking for applications whose customers demand a modern-looking UI on a budget?

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• Using Unit of Work design pattern / NHibernate Sessions in an MVVM WPF

  - by Echiban

  I think I am stuck in the paralysis of analysis. Please help! I currently have a project that Uses NHibernate on SQLite Implements Repository and Unit of Work pattern: http://blogs.hibernatingrhinos.com/nhibernate/archive/2008/04/10/nhibernate-and-the-unit-of-work-pattern.aspx MVVM strategy in a WPF app Unit of Work implementation in my case supports one NHibernate session at a time. I thought at the time that this makes sense; it hides inner workings of NHibernate session from ViewModel. Now, according to Oren Eini (Ayende): http://msdn.microsoft.com/en-us/magazine/ee819139.aspx He convinces the audience that NHibernate sessions should be created / disposed when the view associated with the presenter / viewmodel is disposed. He presents issues why you don't want one session per windows app, nor do you want a session to be created / disposed per transaction. This unfortunately poses a problem because my UI can easily have 10+ view/viewmodels present in an app. He is presenting using a MVP strategy, but does his advice translate to MVVM? Does this mean that I should scrap the unit of work and have viewmodel create NHibernate sessions directly? Should a WPF app only have one working session at a time? If that is true, when should I create / dispose a NHibernate session? And I still haven't considered how NHibernate Stateless sessions fit into all this! My brain is going to explode. Please help!

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• Algorithm design, "randomising" timetable schedule in Python although open to other languages.

  - by S1syphus

  Before I start I should add I am a musician and not a native programmer, this was undertook to make my life easier. Here is the situation, at work I'm given a new csv file each which contains a list of sound files, their length, and the minimum total amount of time they must be played. I create a playlist of exactly 60 minutes, from this excel file. Each sample played the by the minimum number of instances, but spread out from each other; so there will never be a period where for where one sound is played twice in a row or in close proximity to itself. Secondly, if the minimum instances of each song has been used, and there is still time with in the 60 min, it needs to fill the remaining time using sounds till 60 minutes is reached, while adhering to above. The smallest duration possible is 15 seconds, and then multiples of 15 seconds. Here is what I came up with in python and the problems I'm having with it, and as one user said its buggy due to the random library used in it. So I'm guessing a total rethink is on the table, here is where I need your help. Whats is the best way to solve the issue, I have had a brief look at things like knapsack and bin packing algorithms, while both are relevant neither are appropriate and maybe a bit beyond me.

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• Visual Studio 2010 Crashes when Creating or Editing a Report (.rdlc) with the Report Designer

  - by ondesertverge

  This is an issue I had with VS 2010 RC and was hoping would be solved with the first official release. Sadly it wasn't. What I have is a number of reports originally created with VS 2008. When opening any of these for editing in VS 2010's Report Designer VS hangs for about two minutes and then shuts down. Same happens when creating a new report using the wizard. Only difference is that a dialog opens up showing a "Loading ..." message then hangs for about the same amount of time and crashes. Running devenv /log gives nothing of value. The Windows Application Event Viewer shows only this: Faulting application name: devenv.exe, version: 10.0.30319.1, time stamp: 0x4ba1fab3 Faulting module name: clr.dll, version: 4.0.30319.1, time stamp: 0x4ba1d9ef Exception code: 0xc00000fd Fault offset: 0x00001919 Faulting process id: 0xc38 Faulting And this: .NET Runtime version 2.0.50727.4927 - Fatal Execution Engine Error (6F551CF2) (0) Has anyone else experienced this and found a solution? OR -- Is there a better tool for rapidly creating decent reports within a WinForms app? Help would be greatly appreciated!

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• Drawing custom graphics on the iPhone: CALayer vs. CGContext

  - by Henry Cooke

  Hi all, I have an application in which I'm doing some custom drawing, a bunch of lines on a gradient background, like so (ignore the text, they're just UILabels): At the moment, that's all done by starting a new CGContext, drawing stuff into it with CGContextDrawLinearGradient and CGContextStrokePath, then finally saving the resulting image with UIGraphicsGetImageFromCurrentImageContext. The positioning info is calculated while I'm laying out those labels, so it'd be a PITA (and duplication of effort) to calculate it all over again when the containing UIView is drawn with drawRect, so I'm drawing it ahead of time into a UIImage. All works fine, so far so good. However, I have a sneaking suspicion that it may be more efficient to use CALayers to do this drawing. My (cursory) understanding of the difference between the two approaches is that a CALayer is more like a bunch of instructions to draw stuff, and so takes up less memory until it's actually drawn onscreen, whereas drawing everything into a UIImage ahead of time means that you've got a sodding great bitmap kicking around in memory all the time, whether it's drawn or not. Is that a correct understanding? What is generally considered to be the best way of drawing custom images on the iPhone?

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• WiX/Windows Installer: Re-install to a new folder

  - by vitalyval

  1. I am using WiX for creating installer and would like to implement the following behaviour: If a user launches msi installer for the product and the product already installed, then wizard works similar to pure (first time) installation with exception of some things (e.g. license aggrement screen is omitted). The wizard should allow for example to change installation folder, select whether to place desktop shortcut,... I tried to do: <Publish Event="ReinstallMode" Value="amus"><![CDATA[INSTALL_MODE = "Change"]]></Publish> <Publish Event="Reinstall" Value="ALL"><![CDATA[INSTALL_MODE = "Change"]]></Publish> But after installation completes: the product is in the same folder, where it was installed first time; desktop icon in the same state as it was after first time install. MSDN says: "Do not attempt to change the target directory path if some components that use the path are already installed for the current user or for a different user". Is there a way to re-install in another forlder and add/remove desktop icon in re-install? 2. Is this normal to use the same KeyPath for some components? For example the same registry values for DeskTop and Programs menu shortcuts? MSDN says: "Two components cannot share the same key path value". But compiling and verifying goes OK. And I did not discover problems using the same keypaths.

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• Android "single top" launch mode and onNewIntent method

  - by Rich

  I read in the Android documentation that by setting my Activity's launchMode property to singleTop OR by adding the FLAG_ACTIVITY_SINGLE_TOP flag to my Intent, that calling startActivity(intent) would reuse a single Activity instance and give me the Intent in the onNewIntent callback. I did both of these things, and onNewIntent never fires and onCreate fires every time. The docs also say that this.getIntent() returns the intent that was first passed to the Activity when it was first created. In onCreate I'm calling getIntent and I'm getting a new one every time (I'm creating the intent object in another activity and adding an extra to it...this extra should be the same every time if it was returning me the same intent object). All this leads me to believe that my activity is not acting like a "single top", and I don't understand why. To add some background in case I'm simply missing a required step, here's my Activity declaration in the manifest and the code I'm using to launch the activity. The Activity itself doesn't do anything worth mentioning in regards to this: in AndroidManifest.xml: <activity android:name=".ArtistActivity" android:label="Artist" android:launchMode="singleTop"> </activity> in my calling Activity: Intent i = new Intent(); i.putExtra(EXTRA_KEY_ARTIST, id); i.setClass(this, ArtistActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); startActivity(i);

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• Using OLEDB parameters in .NET when connecting to an AS400/DB2

  - by Jeff Stock

  I have been pulling my hair out trying to figure out what I can't get parameters to work in my query. I have the code written in VB.NET trying to do a query to an AS/400. I have IBM Access for Windows installed and I am able to get queries to work, just not with parameters. Any time I include a parameter in my query (ex. @MyParm) it doesn't work. It's like it doesn't replace the parameter with the value it should be. Here's my code: I get the following error: SQL0206: Column @MyParm not in specified tables Here's my code: Dim da As New OleDbDataAdapter Dim dt As New DataTable da.SelectCommand = New OleDbCommand da.SelectCommand.Connection = con da.SelectCommand.CommandText = "SELECT * FROM MyTable WHERE Col1 = @MyParm" With da.SelectCommand.Parameters .Add("@MyParm", OleDbType.Integer, 9) .Item("@MyParm").Value = 5 End With ' I get the error here of course da.Fill(dt) I can replace @MyParm with a literal of 5 and it works fine. What am I missing here? I do this with SQL Server all the time, but this is the first time I am attempting it on an AS400.

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• Sql Query - Limiting query results

  - by Gublooo

  I am quite certain we cannot use the LIMIT clause for what I want to do - so wanted to find if there are any other ways we can accomplish this. I have a table which captures which user visited which store. Every time a user visits a store, a row is inserted into this table. Some of the fields are shopping_id (primary key) store_id user_id Now what I want is - for a given set of stores, find the top 5 users who have visited the store max number of times. I can do this 1 store at a time as: select store_id,user_id,count(1) as visits from shopping where store_id = 60 group by user_id,store_id order by visits desc Limit 5 This will give me the 5 users who have visited store_id=60 the max times What I want to do is provide a list of 10 store_ids and for each store fetch the 5 users who have visited that store max times select store_id,user_id,count(1) as visits from shopping where store_id in (60,61,62,63,64,65,66) group by user_id,store_id order by visits desc Limit 5 This will not work as the Limit at the end will return only 5 rows rather than 5 rows for each store. Any ideas on how I can achieve this. I can always write a loop and pass 1 store at a time but wanted to know if there is a better way

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