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  • Why not to use StackTrace to find what method called you

    - by Alex.Davies
    Our obfuscator, SmartAssembly, does some pretty crazy reflection. It's an obfuscator, it's sort of its job to do things in the most awkward way possible. But sometimes, you can go too far. One such time is this little gem from the strings encoding feature: StackTrace stackTrace = new StackTrace(); StackFrame frame = stackTrace.GetFrame(1); Type ownerType = frame.GetMethod().DeclaringType; It's designed to find the type where the calling method is defined. A user found that strings encoding occasionally broke on x64 systems. Very strange. After some debugging (thank god for Reflector Pro, it would be impossible to debug processed assemblies without it) I found that the ownerType I got back was wrong. The reason is that the x64 JIT does tail call optimisation. This saves space on the stack, and speeds things up, by throwing away a method's stack frame if the last thing that it calls is the only thing returned. When this happens, the call to StackTrace faithfully tells you that the calling method is the one that called the one we really wanted. So using StackTrace isn't safe for anything other than debugging, and it will make your code fail in unpredictable ways. Don't use it!

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  • SQLAuthority News – Resolution for New Year 2011

    - by pinaldave
    Today is the first day of the year so I want to write something very light. Last Year: 2010 Last Year was a blast; really traveled a lot. My family and I went on vacation. There I enjoyed being father, rolling on the floor and playing with my daughter. Here is the list of the countries I visited throughout 2010: Singapore (twice) Malaysia (twice) Sri Lanka (thrice) Nepal (once) United States of America (twice) United Arab Emirates (UAE) (once) My daughter who just completed 1 year on September 1, 2010 has so far visited three countries: Singapore, Malaysia and Sri Lanka, where I have done lots of community activities. The list containing all my activities can be found at Pinal Dave’s Community Events. I have written nearly 380 blog posts last year. It would be difficult for me to pick a few. However, I keep a running list of all of my articles over here: All Articles on SQLAuthority.com. I have so far received more than 10,000 email questions during the year and consequently I have done my best to answer most of them. I strongly believe if one would Search SQLAuthority.com blog, they would have found the answer quickly. The best part of 2010 for me was working on SQL Server Health Check and SQL Server Performance Tuning. This Year: 2011 This year, I came up with two simple goals: 1. Personal Goal: Reduce Weight 2. Professional Goal: Stay busy for the entire year with SQL Server Performance Tuning Projects. (Currently January 2011 is booked with performance tuning projects and 40 other days are already booked throughout the year). Future The future is something one cannot exactly guess and one cannot see. I just want to wish all of you the very best for this coming New Year. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: About Me, Pinal Dave, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology

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  • LINQ: Single vs. SingleOrDefault

    - by Paulo Morgado
    Like all other LINQ API methods that extract a scalar value from a sequence, Single has a companion SingleOrDefault. The documentation of SingleOrDefault states that it returns a single, specific element of a sequence of values, or a default value if no such element is found, although, in my opinion, it should state that it returns a single, specific element of a sequence of values, or a default value if no such element is found. Nevertheless, what this method does is return the default value of the source type if the sequence is empty or, like Single, throws an exception if the sequence has more than one element. I received several comments to my last post saying that SingleOrDefault could be used to avoid an exception. Well, it only “solves” half of the “problem”. If the sequence has more than one element, an exception will be thrown anyway. In the end, it all comes down to semantics and intent. If it is expected that the sequence may have none or one element, than SingleOrDefault should be used. If it’s not expect that the sequence is empty and the sequence is empty, than it’s an exceptional situation and an exception should be thrown right there. And, in that case, why not use Single instead? In my opinion, when a failure occurs, it’s best to fail fast and early than slow and late. Other methods in the LINQ API that use the same companion pattern are: ElementAt/ElementAtOrDefault, First/FirstOrDefault and Last/LastOrDefault.

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  • Using XML as data storage

    - by Kian Mayne
    I was thinking about the XML format and the following quote: “XML is not a database. It was never meant to be a database. It is never going to be a database. Relational databases are proven technology with more than 20 years of implementation experience. They are solid, stable, useful products. They are not going away. XML is a very useful technology for moving data between different databases or between databases and other programs. However, it is not itself a database. Don't use it like one.“ -Effective XML: 50 Specific Ways to Improve Your XML by Elliotte Rusty Harold (page 230, Part 4, Item 41, 2nd paragraph) This seems to really stress that XML should not be used for data storage and should only be used for program to program interoperability. Personally, I disagree and .NET's app.config file that's used to store a program's settings is an example of data storage in an XML file. However for databases rather than configurations etc XML should not be used. To develop my point, I will use two examples: A) Data about customers with fields that are all on one level i.e. there are a number of fields all relating to one customer with no children B) Data about configuration of an application where nested fields and properties make a lot of sense So my question is, Is this still a valid statement and is it now acceptable to store data using XML? EDIT: I've sent an email to the author of that quote to ask for his input/extra context.

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  • links for 2010-12-15

    - by Bob Rhubart
    Pravin Janardanam: Security in OBIEE 11g, Part 1 Guest blogger Pravin Janardanam kicks off a two-part series in which he tackles the differences in security between OBIEE 11g and 10g, and provides some hints on security migration from a 10g environment. (tags: oracle otn businessintelligence obiee) HttpClusterServlet Configuration (Weblogic Server Acting as a Proxy) Quick tips from Divay Dureja. (tags: oracle weblogic servlet configuration) Accelerating Deployment of Virtualized Infrastructures with the Oracle VM Blade Cluster Reference Configuration "The Oracle VM blade cluster reference configuration is a single-vendor solution that addresses every layer of the virtualization stack with Oracle hardware and software components." - from the white paper. (tags: oracle otn oraclevm virtualization) A SOA Safari (Antony Reynolds' Blog) SOA author Antony Reynolds shares links to some of his favorite SOA titles available for reading on Safari. (tags: oracle otn soa) Using Crossbow and Solaris 11 Express Zones for a single machine proof of concept environment with Puppet "My last blog entry was about my debugging experience with Puppet and promise to share the setup that I used. I now follow up that previous entry with this one which describes my Crossbow + NAT + S11 Zones proof of concept." - Michael Tin (tags: oracle solaris crossbow) @myfear: One thing you did not know about Java EE class loading in GlassFish 2.x "Be careful migrating apps from one app server to the other. And don't expect to have a strong hierarchical class loader in place. That is especially true for GF 2.x class loading." Oracle ACE Director Markus Eisele (tags: oracle otn oracleace java glassfish weblogic)

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  • High-Level Application Architecture Question

    - by Jesse Bunch
    So I'm really wanting to improve how I architect the software I code. I want to focus on maintainability and clean code. As you might guess, I've been reading a lot of resources on this topic and all it's doing is making it harder for me to settle on an architecture because I can never tell if my design is the one that the more experienced programmer would've chosen. So I have these requirements: I should connect to one vendor and download form submissions from their API. We'll call them the CompanyA. I should then map those submissions to a schema fit for submitting to another vendor for integration with the email service provider. We'll call them the CompanyB. I should then submit those responses to the ESP (CompanyB) and then instruct the ESP to send that submitter an email. So basically, I'm copying data from one web service to another and then performing an action at the latter web service. I've identified a couple high-level services: The service that downloads data from CompanyA. I called this the CompanyAIntegrator. The service that submits the data to CompanyB. I called this CompanyBIntegrator. So my questions are these: Is this a good design? I've tried to separate the concerns and am planning to use the facade pattern to make the integrators interchangeable if the vendors change in the future. Are my naming conventions accurate and meaningful to you (who knows nothing specific of the project)? Now that I have these services, where should I do the work of taking output from the CompanyAIntegrator and getting it in the format for input to the CompanyBIntegrator? Is this OK to be done in main()? Do you have any general pointers on how you'd code something like this? I imagine this scenario is common to us engineers---especially those working in agencies. Thanks for any help you can give. Learning how to architect well is really mind-cluttering.

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  • Constructor vs setter validations

    - by Jimmy
    I have the following class : public class Project { private int id; private String name; public Project(int id, String name, Date creationDate, int fps, List<String> frames) { if(name == null ){ throw new NullPointerException("Name can't be null"); } if(id == 0 ){ throw new IllegalArgumentException("id can't be zero"); } this.name = name; this.id = id; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } } I have three questions: Do I use the class setters instead of setting the fields directly. One of the reason that I set it directly, is that in the code the setters are not final and they could be overridden. If the right way is to set it directly and I want to make sure that the name filed is not null always. Should I provide two checks, one in the constructor and one in the setter. I read in effective java that I should use NullPointerException for null parameters. Should I use IllegalArgumentException for other checks, like id in the example.

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  • Organizing Connections with Folders in Oracle SQL Developer

    - by thatjeffsmith
    How many Oracle databases do you work with on a regular basis? I’m guessing the answer for most of you lies between 1 and 500. This post is really geared for those of you who deal with more than just a handful (5) of database connections. Filters are nice when you need to work with a subset of table data, or even a list of tables. So why wouldn’t they be just as useful for organizing your connections? Here’s my complete list of databases: The folders aren’t there by default, you add them as you need them. Now this isn’t an overly large connection list. But when I need to fire up an impromptu demo for a customer, it’s very nice to be able to drill down into JUST those ‘safe’ environments. This actually saves me a few seconds every time I need to connect to one of my databases. So while it’s a very simple feature, it’s one of those things that I recommend EVERYONE take advantage of as it will save them hours of time over the long haul. Easier to find means I get to work a few seconds faster. This also helps me from making mistakes in ‘production’ environments! How to Add a Connection Folder Select a connection you want to organize. Mouse-right-click, and choose ‘Add to folder.’ You can throw it into a new container or an existing one. Lather, rinse, and repeat as necessary. The only trick is remembering to right-click! Special thanks to @dresendi for today’s topic! He asked how to do this and I realized I hadn’t blogged the topic yet

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  • Strategy for restoring state via URL in web apps

    - by JW01
    This is a question about modern web apps, where a single page is loaded, and all subsequent navigation is done by XHR calls and modifying the DOM. We can use libraries that manipulate the hash string, which let us navigate by URL and support the back/forward buttons. But to use those libraries, we need to be able to move the UI from any one state to any other. Is there a good strategy for moving between UI states, that also allows them to be restored from scratch when you load a new URL? In a complex app, you might have a lot of different states. You don't want to reload the entire UI each time you change states. But you also don't want to require separate methods for moving from every state to each every state. Typically we need to: Restore a state from scratch, when you enter a new URL or hit Reload. Move from one state to another, when you use the Back/Forward buttons. Move from one state to another, when you perform an action within your app (like clicking a link). Move to certain states that shouldn't be added to the history, like ones that appear after form submissions. Move to some states that are built on the previous state, like a drill-down list. When you perform actions within your app, there's the additional question of which comes first: Do you change the URL, listen for the URL change, and change your state in response to it? Or do you change your state, then change the URL, but don't do anything in response? Does anyone have some experience to share on this topic?

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  • PowerShell to fetch a SQL Execution Plan

    - by Rob Farley
    With PowerShell becoming the scripting language of choice for many people, I’ve occasionally wondered about using it to analyse execution plans. After all, an execution plan is just XML, and PowerShell is just one tool which will very easily handle xml. The thing is – there’s no Get-SqlPlan cmdlet available, which has frustrated me in the past. Today I figured I’d make one. I know that I can write T-SQL to get an execution plan using SET SHOWPLAN_XML ON, but the problem is that this must be the only statement in a batch. So I used go, and a couple of newlines, and whipped up the following one-liner: function Get-SqlPlan([string] $query, [string] $server, [string] $db) { return ([xml] (invoke-sqlcmd -Server $server -Database $db -Query "set showplan_xml on;`ngo`n$query").Item( 0)) } (but please bear in mind that I have the SQL Snapins installed, which provides invoke-sqlcmd) To use this, I just do something like: $plan = get-sqlplan "select name from Production.Product" "." "AdventureWorks" And then find myself with an easy way to navigate through an execution plan! At some point I should make the function more robust, but this should be a good starter for any SQL PowerShell enthusiasts (like Aaron Nelson) out there.

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  • Changing Palette for Day/Light Mode using GIMP

    - by J.C.
    Hello, Suppose I've a picture, which want to achieve day/light mode by changing 8bpp color palette. If I want the pixel index of my picture is always fixed for both day mode and night mode. For example, the 1st pixel index is 100. Which I can look up index 100 in day mode palette and night mode palette. How can I use GIMP to do so? My goal is to not update my pixel index of my picture. Also, as you see in two palette, they are not one one mapping. That is index 1 of the day mode palette and index 1 of the night mode palette may not used in the same pixel of the picture, how can I tackle this problem? Actually, my use case is as follow I want to use one 8bpp picture to achieve day/night mode by update only the color palette (without updating the pixel index). The advantage is I only have to prepare 2 256 byte palette rather than saving 2 big pictures in my limited data ram. Thanks a lot

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  • IndyTechFest Recap

    - by Johnm
    The sun had yet to raise above the horizon on Saturday, May 22nd and I was traveling toward the location of the 2010 IndyTechFest. In my freshly awaken, and pre-coffee, state I reflected on the months that preceded this day and how quickly they slipped away. The big day had finally come and the morning dew glistened with a unique brightness that morning. What is this all about? For those who are unfamiliar with IndyTechFest, it is a regional conference held in Indianapolis and hosted by the Indianapolis .NET Developers Association (IndyNDA) and the Indianapolis Professional Association for SQL Server (IndyPASS).  The event presents multiple tracks and sessions covering subjects such as Business Intelligence,  Database Administration, .NET Development, SharePoint Development, Windows Mobile Development as well as non-Microsoft topics such as Lean and MongoDB. This year's event was the third hosting of IndyTechFest. No man is an island No event such as IndyTechFest is executed by a single person. My fellow co-founders, with their highly complementary skill sets and philanthropy make the process very enjoyable. Our amazing volunteers and their aid were indispensible. The generous financial support of our sponsors that made the event and fabulous prizes possible. The spectacular line up of speakers who came from near and far to donate their time and knowledge. Our beloved attendees who sacrificed the first sunny Saturday in weeks to expand their skill sets and network with their peers. We are deeply appreciative. Challenges in preparation With the preparation of any event comes challenges. It is these challenges that makes the process of planning an event so interesting. This year's largest challenge was the location of the event. In the past two years IndyTechFest was held at the Gene B. Glick Junior Achievement Center in Indianapolis. This facility has been the hub of the Indy technical community for many years. As the big day drew near, the facility's availability came into question due to some recent changes that had occurred with those who operated the facility. We began our search for an alternative option. Thankfully, the Marriott Indianapolis East was available, was very spacious and willing to work within the range of our budget. Within days of our event, the decision to move proved to be wise since the prior location had begun renovations to the interior. Whew! Always trust your gut. Every day it's getting better At the ending of each year, we huddle together, review the evaluations and identify an area in which the event could improve. This year's big opportunity for improvement resided in the prize give-away portion at the end of the day. In the 2008 event, admittedly, this portion was rather chaotic, rushed and disorganized. This year, we broke the drawing into two sections, of which each attendee received two tickets. The first ticket was a drawing for the mountain of books that were given away. The second ticket was a drawing for the big prizes, the 2 Xboxes, 3 laptops and iPad. We peppered the ticket drawings with gift card raffles and tossing t-shirts into the audience. If at first you don't succeed, try and try again Each year of IndyTechFest, we have offered a means for ad-hoc sessions or discussion groups to pop-up. To our disappointment it was something that never quite took off. We have always believed that this unique type of session was valuable and wanted to figure out a way to make it work for this year. A special thanks to Alan Stevens, who took on and facilitated the "open space" track and made it an official success. Share with your tweety When the attendee badges were designed we decided to place an emphasis on the attendee's Twitter account as well as the events hash-tag (#IndyTechFest) to encourage some real-time buzz during the day. At the host table we displayed a Twitter feed for all to enjoy. It was quite successful and encouraging use of social media. My badge was missing my Twitter account since it was recently changed. For those who care to follow my rather sparse tweets, my address is @johnnydata. Man, this is one long blog post! All in all it was a very successful event. It is always great to see new faces and meet old friends. The planning for the 2011 IndyTechFest will kick off very soon. We have more capacity for future growth and a truck full of great ideas. Stay tuned!

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  • Cluster Nodes as RAID Drives

    - by BuckWoody
    I'm unable to sleep tonight so I thought I would push this post out VERY early. When you don't sleep your mind takes interesting turns, which can be a good thing. I was watching a briefing today by a couple of friends as they were talking about various ways to arrange a Windows Server Cluster for SQL Server. I often see an "active" node of a cluster with a "passive" node backing it up. That means one node is working and accepting transactions, and the other is not doing any work but simply "standing by" waiting for the first to fail over. The configuration in the demonstration I saw was a bit different. In this example, there were three nodes that were actively working, and a fourth standing by for all three. I've put configurations like this one into place before, but as I was looking at their architecture diagram, it looked familar - it looked like a RAID drive setup! And that's not a bad way to think about your cluster arrangements. The same concerns you might think about for a particular RAID configuration provides a good way to think about protecting your systems in general. So even if you're not staying awake all night thinking about SQL Server clusters, take this post as an opportunity for "lateral thinking" - a way of combining in your mind the concepts from one piece of knowledge to another. You might find a new way of making your technical environment a little better. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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  • Adopting Technologies for the Sake of Technologies

    - by shiju
    Unlike other engineering industries, the software engineering industry is really lacking maturity. The lack of maturity can see in different aspects of entire software development life cycle. I think other engineering industries are well organised and structured with common, proven engineering practices. The software engineering industry is greatly a diverse industry with different operating systems, and variety of development platforms, programming languages, frameworks and tools. Now these days, people are going behind the hypes and intellectual thoughts without understanding their core business problems and adopting technologies and practices for the sake of technologies and practices and simply becoming a “poster child” of technologies and practices. Understanding the core business problem and providing best, solid solution with a platform neutral approach, will give you more business values and ROI, instead of blindly adopting technologies and tailor-made your applications for the sake of technologies and practices. People have been simply migrating their solutions in favour of new technologies and different versions of frameworks without any business need. The “Pepsi Challenge” in the Software Development  Pepsi Challenge marketing campaign of the 1980s was a popular and very interesting marketing promotion in which people taste one cup of Pepsi and another cup with Coca Cola. In the taste test, more than 50% of people were preferred Pepsi  over Coca Cola. The success story behind the Pepsi was more sweetness contains in the Pepsi cola. They have simply added more sugar and more people preferred more sweet flavour. You can’t simply identify the better one after sipping one cup of cola based on the sweetness which contains. These things have been happening in the software industry for choosing development frameworks and technologies. People have been simply choosing frameworks based on the initial sugary feeling without understanding its core strengths and weakness. The sugary framework might be more harmful when you develop real-world systems. There is not any silver bullet for solving all kind of problems and frameworks and tools do have strengths and weakness. So it would be better to understand their strength and weakness. And please keep in mind that you have to develop real apps to understand the real capabilities and weakness of a framework. Evaluating a technology based on few blog posts will harm your projects and these bloggers might be lacking real-world experience with the framework. The Problem with Align a Development Practice with Tools Recently I have observed a discussion in a group where one guy asked suggestions for practicing Continuous Delivery (CD) as part of the agile based application engineering. Then the discussion quickly went to using and choosing a Continuous Integration (CI) tool and different people suggested different Continuous Integration (CI) tools for simply practicing Continuous Delivery. If you have worked with core agile engineering practices, you could clearly know that the real essence of agile is neither choosing a tool nor choosing a process. By simply choosing CI tool from a particular vendor will not ensure that you are delivering an evolving software based on customer feedback. You have to understand the real essence of a engineering practice and choose a right tool for practicing it instead of simply focus on a particular tool for a practicing an development practice. If you want to adopt a practice, you need a solid understanding on it with its real essence where tools are just helping us for better automation. Adopting New Technologies for the Sake of Technologies The another problem is that developers have been a tendency to adopt new technologies and simply migrating their existing apps to new technologies. It is okay if your existing system is having problem  with a technology stack or or maintainability challenge with existing solution, and moving to new technology for solving the current problems. We have been adopting new technologies for solving new challenges like solving the scalability challenges when the application or user bases is growing unpredictably. Please keep in mind that all new technologies will become old after working with it for few years. The below Facebook status update of Janakiraman, expresses the attitude of a typical customer. For an example, Node.js is becoming a hottest buzzword in the software industry and many developers are trying to adopt Node.js for their apps. The important thing is that Node.js is a minimalist framework that does some great things for some problems, but it’s not a silver bullet. I have been also working with Node.js which is good for some problems, but really bad for choosing it for all kind of problems. By adopting new technologies for new projects is good if we could get real business values from it because newer framework would solve some existing well known problems and provide better solutions where it can incorporate good solutions for the latest challenges . But adopting a new technology for the sake of new technology is really bad idea. Another example is JavaScript is getting lot of attention so that lot of developers are developing heavy JavaScript centric web apps. First, they will adopt a client-side JavaScript MV* framework from AngularJS, Ember, Backbone etc, and develop a Single Page App(SPA) where they are repeating the mistakes we did in the past with server-side. The mistakes we did in the server-side is transforming to client-side. The problem is that people are just adopting new technologies, but not improving their solutions. I predict that many Single Page App will suck in the future. We need a hybrid approach where we should be able to leverage both server-side and client-side for developing next-generation web apps. The another problem is that if you like a particular framework, use it for all kind of apps. In the past, I know some Silverlight passionate guys were tried to use that framework for all kind of apps including larger line of business apps. And these days developers are migrating their existing Silverlight apps in favour of HTML5 buzzword. So the real question is, what is the business values we are getting from these apps when we are developing it for the sake of a particular technology instead of business need. The another problem is that our solutions consultants are trying to provide unnecessary solutions for the sake of a particular technology or for a hype. For an example, Big Data solutions are great for solving the problem of three Vs : volume, velocity and variety. But trying to put this for every application will make problems. Let’s say, there is a small web site running with limited budget and saying that we need a recommendation engine for the web site with a Hadoop based solution with a 16 node cluster, would be really horrible. If we really need a Hadoop based solution, got for it, but trying to put this for all application would be a big disaster. It would be great if could understand the core business problems first, and later choose a right framework for providing solutions for the actual business problem, instead of trying to provide so many solutions. The Problem with Tied Up to a Platform Vendor Some organizations and teams are tied up with a particular platform vendor where they don’t want to use any product other than their preferred or existing platform vendor. They will accept any product provided by the vendor regardless of its capability. This will lets you some benefits regards with integration and collaboration of different products provided by the same vendor, but it will loose your opportunity to provide better solution for your business problems. For a real world sample scenario, lot of companies have been using SAP for their ERP solutions. When they are thinking about mobility or thinking about developing hybrid mobile apps, they can easily find out a framework from SAP. SAP provides a framework for HTML 5 based UI development named SAPUI5. If you are simply adopting that framework only based for the preference of existing platform vendor, you might be loose different opportunities for providing better solution. Initially you might enjoy the sugary feeling provided by the platform vendor, but you have to think about developing apps which should be capable for solving future challenges. I am not saying that any framework is not good and I believe that all frameworks are good over another one for solving at least one problem. My point is that we should not tied up with any specific platform vendor unless your organization is having resource availability problems. Being Polyglot for Providing Right Solutions The modern software engineering industry is greatly diverse with different tools and platforms. Lot of open source frameworks and new programming languages have been releasing to the developer community, where choosing the right platform without any biased opinion, is really a difficult task. But it would really great if we could develop an attitude with platform neutral mindset and being a polyglot developer for providing better solutions based on the actual business problems. IMHO, we should learn a new programming language and a new framework every year. This will improve the quality of our developer capabilities and also improve the quality of our primary programming language skills. Being polyglot for individual developers and organizational teams will give you greater opportunity to your developer experience and also for your applications. Organizations can analyse their business problem without tied with any technology and later they can provide solutions by choosing different platform and tools. Summary    In this blog post, what I was trying to say that we should not tied up or biased with any development platform, technology, vendor or programming language and we should not adopt technologies and practices for the sake of technologies. If we are adopting a technology or a practice for the sake of it, we are simply becoming a “poster child” of the technology and practice. We should not become a poster child of other people’s intellectual thoughts and theories, instead of it we should become solutions developers and solutions consultants where we should be able to provide better solutions for the business problems. Being a polyglot developer is a good idea for improving your developer skills which lets you provide better solutions for the business problems. The most important thing is that we should become platform neutral developers where our passion should be for providing brilliant solutions. It would be great if we could provide minimalist, pragmatic business solutions. You can follow me on Twitter @shijucv

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  • Where to find Hg/Git technical support?

    - by Rook
    Posting this as a kind of a favour for a former coleague, so I don't know the exact circumstances, but I'll try to provide as much info as I can ... A friend from my old place of employment (maritime research institute; half government/commercial funding) has asked me if I could find out who provides technical support (commercial) for two major DVCS's of today - Git and Mercurial. They have been using VCS for years now (Subversion while I was there, don't know what they're using now - probably the same), and now they're renewing their software licences (they have to give a plan some time in advance for everything ... then it goes "through the system") and although they will be keeping Subversion as well, they would like to justify beginning of DVCS as an alternative system (most people root for Mercurial since it seems simpler; mostly engineers and physicians there who are not that interested in checking Git repos for corruption and the finer workings of Git, but I believe any one of the two could "pass") - but it has to have a price (can be zero; no problem there) and some sort of official technical support. It is a pro forma matter, but it has to be specified. Most of the people there are using one of the two already, but this has to be specified to be official. So, I'm asking you - do you know where could one go for Git or Mercurial technical support (can be commercial)? Technical forums and the like are out of the question. It has to work on the principle: - I have a problem. - I post a question with the details. - I get an answer in specified time. It can be "we cannot do that." but it has to be an official answer and given in agreed time. I'm sure by now most of you understand what I'm asking, but if not - post a comment or similar. Also, if you think of any reasons which could decide justification of introducing Git/Hg from an technical and administrative viewpoint, feel free to write them down also.

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  • GRE subject Computer science

    - by Maddy.Shik
    How do I prepare for the GRE Computer Science subject test? Are there any standard text books I should follow? Agree that its under graduation level and one doesn't need to dig to deep for it. I have done my computer engineering from a college who ranks in top 20 in India. So may be my curriculum has not been that good as compared to international students. Since now i want to get admission in to world renowned university's Ph. D. program. I want to enhance my basic skills up to a level to beat other international students in competition. I want to know good book references which are recommended by professors in international school like CMU, MIT, Standford etc. Like for Algorithms Coreman is considered very good. Good books builds concepts from very basic so that one doesn't need to mug up even a basic concepts. Coreman is just too good with good blend of Mathematics and programming concepts. Definitely Test paper are must but that can be practiced once one has read text books thoroughly. Besides its been 2 years i passed out from college so its is essential for me to revise all concepts from text books. Please tell me standard text books for each subject like Computer Architecture, Database Design, Operating Systems, Discrete Maths etc.

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  • Why can't I run Compiz?

    - by jasoncruz98
    I installed Ubuntu 11.10 on my laptop. The main reason I switched to Ubuntu is because I wanted to use Compiz. The first thing I did was to go to Additional Drivers and install ATI/AMD Proprietary FGRLX Graphics Driver. There was also another one available, ATI/AMD Proprietary FGRLX Graphics Driver (post-release updates), but I didn't install that one, because it basically meant the same thing to me as the one I already installed. Next, I went to the ubuntuguide.org Oneiric Wiki http://ubuntuguide.org/wiki/Ubuntu:Oneiric#Compiz_Fusion So I followed the instructions there and ran this command in terminal: sudo apt-get install compiz compizconfig-settings-manager compiz-fusion-plugins-main compiz-fusion-plugins-extra emerald librsvg2-common But then, the terminal window said that the package "emerald" could not be found. So, I ran this command instead: sudo apt-get install compiz compizconfig-settings-manager compiz-fusion-plugins-main compiz-fusion-plugins-extra After that, I installed Fusion Icon by running this command: sudo apt-get install fusion-icon I restarted my computer, searched for Compiz Config Settings Manager, and clicked on it. Then, I activated Wobbly Windows. I logged off and logged back on again, but there was no wobbly windows effect. So I tried clicking on Fusion Icon, but it never started. Can someone please tell me what I did wrong here? Because I see everyone seems to be able to run Compiz except me. I really need to start Compiz, or else I think I'm going to uninstall Ubuntu.

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  • Load different levels in XML

    - by Anearion
    my question is more about a theoretical gener than a pratical way to make things happen. I'm about start developing a game for android, text based so i won't need sprites or animation, nor a game engine. Let's say is similar to a sudoku game, where each level is an harder version of sudoku and each level has some question to be asnwered over the sudoku itself. I was wondering if the better way is to have only one XML and then inside all the different levels, each one with his meta-tags, or if the different approach of making n xml files where each one is a level is preferred. At the moment a level should have those tags: <level> <question>Question_1</question> <hint1>what does it do?</hint1> <hint2>where...</hint2> .... <hintN>how...</hintN> </level> So each level could have some items to read and that's what made me think that maybe different files are better cuz if i have to load lvl 10 i can read only the 10.xml file. I hope my question isn't too stupind. Thanks in advance

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  • CodePlex Daily Summary for Sunday, March 25, 2012

    CodePlex Daily Summary for Sunday, March 25, 2012Popular ReleasesAsp.NET Url Router: v1.0: build for .net 2.0 and .net 4.0menu4web: menu4web 0.0.3: menu4web 0.0.3Craig's Utility Library: Craig's Utility Library 3.1: This update adds about 60 new extension methods, a couple of new classes, and a number of fixes including: Additions Added DateSpan class Added GenericDelimited class Random additions Added static thread friendly version of Random.Next called ThreadSafeNext. AOP Manager additions Added Destroy function to AOPManager (clears out all data so system can be recreated. Really only useful for testing...) ORM additions Added PagedCommand and PageCount functions to ObjectBaseClass (same as M...MemoryLifter: MemoryLifter 2.4.1: KNOWN ISSUE: Sometime the automatic installation of SQL Compact Edition dependency does not work, when you are behind a proxy server. To solve that problem install SQL CE 3.5 SP2 manually from the following link: http://www.microsoft.com/download/en/details.aspx?id=5783SQL Monitor - managing sql server performance: SQLMon 4.2 alpha 14: 1. improved accuracy of logic fault checking in analysisDotSpatial: DotSpatial 1.1: This is a Minor Release. See the changes in the issue tracker. Minimal -- includes DotSpatial core and essential extensions Extended -- includes debugging symbols and additional extensions Just want to run the software? End user (non-programmer) version available branded as MapWindow Want to add your own feature? Develop a plugin, using the template and contribute to the extension feed (you can also write extensions that you distribute in other ways). Components are available as NuGet pa...Microsoft All-In-One Code Framework - a centralized code sample library: C++, .NET Coding Guideline: Microsoft All-In-One Code Framework Coding Guideline This document describes the coding style guideline for native C++ and .NET (C# and VB.NET) programming used by the Microsoft All-In-One Code Framework project team.WebDAV for WHS: Version 1.0.67: - Added: Check whether the Remote Web Access is turned on or not; - Added: Check for Add-In updates;Phalanger - The PHP Language Compiler for the .NET Framework: 3.0 (March 2012) for .NET 4.0: March release of Phalanger 3.0 significantly enhances performance, adds new features and fixes many issues. See following for the list of main improvements: New features: Phalanger Tools installable for Visual Studio 2011 Beta "filter" extension with several most used filters implemented DomDocument HTML parser, loadHTML() method mail() PHP compatible function PHP 5.4 T_CALLABLE token PHP 5.4 "callable" type hint PCRE: UTF32 characters in range support configuration supports <c...Nearforums - ASP.NET MVC forum engine: Nearforums v8.0: Version 8.0 of Nearforums, the ASP.NET MVC Forum Engine, containing new features: Internationalization Custom authentication provider Access control list for forums and threads Webdeploy package checksum: abc62990189cf0d488ef915d4a55e4b14169bc01 Visit Roadmap for more details.BIDS Helper: BIDS Helper 1.6: This beta release is the first to support SQL Server 2012 (in addition to SQL Server 2005, 2008, and 2008 R2). Since it is marked as a beta release, we are looking for bug reports in the next few months as you use BIDS Helper on real projects. In addition to getting all existing BIDS Helper functionality working appropriately in SQL Server 2012 (SSDT), the following features are new... Analysis Services Tabular Smart Diff Tabular Actions Editor Tabular HideMemberIf Tabular Pre-Build ...Json.NET: Json.NET 4.5 Release 1: New feature - Windows 8 Metro build New feature - JsonTextReader automatically reads ISO strings as dates New feature - Added DateFormatHandling to control whether dates are written in the MS format or ISO format, with ISO as the default New feature - Added DateTimeZoneHandling to control reading and writing DateTime time zone details New feature - Added async serialize/deserialize methods to JsonConvert New feature - Added Path to JsonReader/JsonWriter/ErrorContext and exceptions w...SCCM Client Actions Tool: SCCM Client Actions Tool v1.11: SCCM Client Actions Tool v1.11 is the latest version. It comes with following changes since last version: Fixed a bug when ping and cmd.exe kept running in endless loop after action progress was finished. Fixed update checking from Codeplex RSS feed. The tool is downloadable as a ZIP file that contains four files: ClientActionsTool.hta – The tool itself. Cmdkey.exe – command line tool for managing cached credentials. This is needed for alternate credentials feature when running the HTA...WebSocket4Net: WebSocket4Net 0.5: Changes in this release fixed the wss's default port bug improved JsonWebSocket supported set client access policy protocol for silverlight fixed a handshake issue in Silverlight fixed a bug that "Host" field in handshake hadn't contained port if the port is not default supported passing in Origin parameter for handshaking supported reacting pings from server side fixed a bug in data sending fixed the bug sending a closing handshake with no message which would cause an excepti...SuperWebSocket, a .NET WebSocket Server: SuperWebSocket 0.5: Changes included in this release: supported closing handshake queue checking improved JSON subprotocol supported sending ping from server to client fixed a bug about sending a closing handshake with no message refactored the code to improve protocol compatibility fixed a bug about sub protocol configuration loading in Mono improved BasicSubProtocol added JsonWebSocketSessionUltra Presenter Desktop: UltraPresenter Desktop Version 2012.03.18: New release with new interface design.LoU: LoU.Dungeons V0: LoU.Dungeons V0SSIS GoogleAnalyticsSource: Version 1.0.3 x64: Now it's possible to select 225 metrics and 93 dimensions and I have modified almost all of the data types.HTML to docx Converter: htmltodocx_0.5.1_alpha: Improved UTF-8 support. Please note, for proper UTF-8 support, there appears to be an issue with PHPWord that needs to be addressed. See: http://phpword.codeplex.com/discussions/261365 for a discussion.Daun Management Studio: Daun Management Studio 0.1 (Alpha Version): These are these the alpha application packages for Daun Management Studio to manage MongoDB Server. Please visit our official website http://www.daun-project.comNew ProjectsBundle Transformer: Bundle Transformer - a modular extension for System.Web.Optimization. Classes CssTransformer and JsTransformer, included in the core of Bundle Transformer, implement interface IBundleTransform. They are intended to replace the standard classes CssMinify and JsMinify.Catel fody plugin: Catel plugin for Fody. For more information about Fody, see http://code.google.com/p/fody/.CharsetConverter: CharsetConverter makes it easier to convert a bunch of files from one charset to another. Files are backuped and recoded. You will no longer need to convert one file after another. It's developed in VB.NET.FNSYS: ??GM Spriter: GM Spriter creates copy rectangle and scaling data for sprites that can drawn in pieces. Supporting a more advanced, optimized, and less resource intensive method.htty: htty is the HTTP TTY, a console application for interacting with web servers.menu4web: menu4web is lightweight javascript code for creating dynamic menus on web sites.mvcpractice2: mvcpractice2National Transportation Information Control Protocol Suite: A Standards Compliant Extensible NTCIP Software Solution. It is utilized in all federally funded projects in the world over. It contains utilities for encoding, decoding in various layer formats such as HDLC, PMPP, SNMP (BER, PER Etc.) There are also some proprietary features. This software was developed in my Free Time because the software in use by my organization was severely lacking and always required some type of major change for the smallest thing. After implementation and...OpenEMR: OpenEMR is an open source medical practice management application (EHR EMR PMS) featuring fully integrated electronic health records, scheduling, electronic billing, internationalization, free support, a vibrant community, and a whole lot more. Mirror of Sourceforge OpenEMR project.Opera Extension Creator: The program helps create extensions for Opera. You can write code in another editor (program can automatically checks for changes on the disk) and only one click to create .oex file and install it in Opera. It's developed in (V)C# 2005 and .NET 2.0. PADNUG Site Redesign: Bringing the PADNUG web site up to current technologies and giving it a facelift.Practico1: ejercicios de practico 1Roslyn and C#-Derived Languages: Roslyn and C#-Derived Languages(for example: Axum)Series Organiser: An app that organises tv series episodes based on the file name into a series folder structure.Silverlight socket component: Beetle.SL?????Silverlight socket?????,???????????,??????????tcp??;?????????????.Skylark: Skylark is an n-tier application to test drive different .NET technologies across various domain problems. It's developed in .NET C#

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  • Conditional attribute in XML - most concise solution?

    - by Lech Rzedzicki
    I am tasked with setting up conditional profiling - a method of tagging chunks of XML with an attribute, which will then be used as a conditional value to extract subset of that XML. Have a look at another definition/example: DITA profiling The XML is documents that are equivalent to printed books - i.e. documents that are often looked at by a human, even if indirectly. Therefore I am looking at a few requirements here: 1. keeping the value list brief - so it doesn't affect the readability of the document 2. be able to process with standard XML tools - a space-separated list inside an attribute is still probably fine, but I'd rather not use too much regexp for this 3. be obvious for various users, including 3rd parties, which content goes where 4. Be easy to maintain going forward Therefore one easy solution is: The problem with this: 1. As the list grows the value of the attribute can be a bit verbose 2. One needs to explicitly state every value even if it's a scenario of this vs everything else Therefore I am also looking at other approaches such as: 1. Using + and - modifiers, Apache htaccess style to override the default cascading of profiling - by default all content goes everywhere and if we want to exclude a bit we just say "-kindle". It does require parsing the whole tree, is not supported by editing tools and one needs to regexp the attribute value a bit deeper... 2. Using an intermediate file to define groups of values such as "other" or "non-print", example of this in DITA. It allows concise XML as well as different grouping and values for each document but it does create a certain level of abstraction which may make it a little less obvious for a 3rd party? Altogether, if you received such XML and were tasked to process it, which option you'd rather receive? If you have any experiences like that, even in an unrelated areas such a builds, don't hesitate to comment!

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  • Smarphone Apps. music, licenses and fees .. nightmare

    - by mm24
    I have recently asked a question about music in games like Guitar Hero. I have found that that in Europe (at least) if I do want to use a track composed by a musician member of a royalty collecting society I need to pay a flat fee to the society and not only to the member. So a "one-to-one" agreement is not valid and the society can come up to me and ask me for money for each download. Even if for FREE! This is a fee sheet list of the UK agency: for fee, see "Permanent download services" It is about 1,200 GBP for less than 22,000 copies and they DON'T specify anything more and they said me on the phone that I need to wait and see how many downloads I get before knowing the price. This is kind of crazy as If I give away the App for free I will have to PAY 1,200 GBP!! I am shocked and I feel very bad. One agency suggested me to use a fake name of the artist, but in this way is not fair to my collaborators as what they hope is that the App gets lots of downloads and in this way that other people will get to know about them and hopefully commission them more work. The other solution is to work only with non registered musicians. The question here to you is.. has anyone found a legal way to do use music from registered authors in a game?

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  • Who writes the words? A rant with graphs.

    - by Roger Hart
    If you read my rant, you'll know that I'm getting a bit of a bee in my bonnet about user interface text. But rather than just yelling about the way the world should be (short version: no UI text would suck), it seemed prudent to actually gather some data. Rachel Potts has made an excellent first foray, by conducting a series of interviews across organizations about how they write user interface text. You can read Rachel's write up here. She presents the facts as she found them, and doesn't editorialise. The result is insightful, but impartial isn't really my style. So here's a rant with graphs. My method, and how it sucked I sent out a short survey. Survey design is one of my hobby-horses, and since some smartarse in the comments will mention it if I don't, I'll step up and confess: I did not design this one well. It was potentially ambiguous, implicitly excluded people, and since I only really advertised it on Twitter and a couple of mailing lists the sample will be chock full of biases. Regardless, these were the questions: What do you do? Select the option that best describes your role What kind of software does your organization make? (optional) In your organization, who writes the text on your software user interfaces? (for example: button names, static text, tooltips, and so on) Tick all that apply. In your organization who is responsible for user interface text? Who "owns" it? The most glaring issue (apart from question 3 being a bit broken) was that I didn't make it clear that I was asking about applications. Desktop, mobile, or web, I wouldn't have minded. In fact, it might have been interesting to categorize and compare. But a few respondents commented on the seeming lack of relevance, since they didn't really make software. There were some other issues too. It wasn't the best survey. So, you know, pinch of salt time with what follows. Despite this, there were 100 or so respondents. This post covers the overview, and you can look at the raw data in this spreadsheet What did people do? Boring graph number one: I wasn't expecting that. Given I pimped the survey on twitter and a couple of Tech Comms discussion lists, I was more banking on and even Content Strategy/Tech Comms split. What the "Others" specified: Three people chipped in with Technical Writer. Author, apparently, doesn't cut it. There's a "nobody reads the instructions" joke in there somewhere, I'm sure. There were a couple of hybrid roles, including Tech Comms and Testing, which sounds gruelling and thankless. There was also, an Intranet Manager, a Creative Director, a Consultant, a CTO, an Information Architect, and a Translator. That's a pretty healthy slice through the industry. Who wrote UI text? Boring graph number two: Annoyingly, I made this a "tick all that apply" question, so I can't make crude and inflammatory generalizations about percentages. This is more about who gets involved in user interface wording. So don't panic about the number of developers writing UI text. First off, it just means they're involved. Second, they might be good at it. What? It could happen. Ours are involved - they write a placeholder and flag it to me for changes. Sometimes I don't make any. It's also not surprising that there's so much UX in the mix. Some of that will be people taking care, and crafting an understandable interface. Some of it will be whatever text goes on the wireframe making it into production. I'm going to assume that's what happened at eBay, when their iPhone app purportedly shipped with the placeholder text "Some crappy content goes here". Ahem. Listing all 17 "other" responses would make this post lengthy indeed, but you can read them in the raw data spreadsheet. The award for the approach that sounds the most like a good idea yet carries the highest risk of ending badly goes to whoever offered up "External agencies using focus groups". If you're reading this, and that actually works, leave a comment. I'm fascinated. Who owned UI text Stop. Bar chart time: Wow. Let's cut to the chase, and by "chase", I mean those inflammatory generalizations I was talking about: In around 60% of cases the person responsible for user interface text probably lacks the relevant expertise. Even in the categories I count as being likely to have relevant skills (Marketing Copywriters, Content Strategists, Technical Authors, and User Experience Designers) there's a case for each role being unsuited, as you'll see in Rachel's blog post So it's not as simple as my headline. Does that mean that you personally, Mr Developer reading this, write bad button names? Of course not. I know nothing about you. It rather implies that as a category, the majority of people looking after UI text have neither communication nor user experience as their primary skill set, and as such will probably only be good at this by happy accident. I don't have a way of measuring those frequency of those accidents. What the Others specified: I don't know who owns it. I assume the project manager is responsible. "copywriters" when they wish to annoy me. the client's web maintenance person, often PR or MarComm That last one chills me to the bone. Still, at least nobody said "the work experience kid". You can see the rest in the spreadsheet. My overwhelming impression here is of user interface text as an unloved afterthought. There were fewer "nobody" responses than I expected, and a much broader split. But the relative predominance of developers owning and writing UI text suggests to me that organizations don't see it as something worth dedicating attention to. If true, that's bothersome. Because the words on the screen, particularly the names of things, are fundamental to the ability to understand an use software. It's also fascinating that Technical Authors and Content Strategists are neck and neck. For such a nascent discipline, Content Strategy appears to have made a mark on software development. Or my sample is skewed. But it feels like a bit of validation for my rant: Content Strategy is eating Tech Comms' lunch. That's not a bad thing. Well, not if the UI text is getting done well. And that's the caveat to this whole post. I couldn't care less who writes UI text, provided they consider the user and don't suck at it. I care that it may be falling by default to people poorly disposed to doing it right. And I care about that because so much user interface text sucks. The most interesting question Was one I forgot to ask. It's this: Does your organization have technical authors/writers? Like a lot of survey data, that doesn't tell you much on its own. But once we get a bit dimensional, it become more interesting. So taken with the other questions, this would have let me find out what I really want to know: What proportion of organizations have Tech Comms professionals but don't use them for UI text? Who writes UI text in their place? Why this happens? It's possible (feasible is another matter) that hundreds of companies have tech authors who don't work on user interfaces because they've empirically discovered that someone else, say the Marketing Copywriter, is better at it. And once we've all finished laughing, I'll point out that I've met plenty of tech authors who just aren't used to thinking about users at the point of need in the way UI text and embedded user assistance require. If you've got what I regard, perhaps unfairly, as the bad kind of tech author - the old-school kind with the thousand-page pdf and the grammar obsession - if you've got one of those then you probably are better off getting the UX folk or the copywriters to do your UI text. At the very least, they'll derive terminology from user research.

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  • How to manually set color of Unity Panel?

    - by JamesTheAwesomeDude
    I was just wondering if there's a way to set the color of the Unity panel manually, as opposed to having it derived from smooshing all the colors of the wallpaper together. (the launcher on the left side of the screen that comes default in Ubuntu is the Unity Panel, right? If not, please correct me on my terminology.) The reason I want this is because I have this cool wallpaper I found on DeviantArt, and I used GIMP to make Dawn, Dusk, and Midnight versions of it. Then, I set them with a transition effect, so that the lighting changes over the course of the day. Unfortunately, the Unity Panel turns a sickly sewer green at night (it could also be said to look like radioactive barf.) Either way, I don't like my launcher thingy looking like that. I'd prefer to stay away from programs that let you customise the Unity Panel (I'm fine with using sudo nano to edit system config files,) but I would if it were the only option. Here are some screenshots, one with a grey-themed wallpaper, one with lots of red, and the hill at night, (the one that makes the unity panel look like radioactive barf.): http://imgur.com/a/0Gqcd

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  • Are there any actual case studies on rewrites of software success/failure rates?

    - by James Drinkard
    I've seen multiple posts about rewrites of applications being bad, peoples experiences about it here on Programmers, and an article I've ready by Joel Splosky on the subject, but no hard evidence of case studies. Other than the two examples Joel gave and some other posts here, what do you do with a bad codebase and how do you decide what to do with it based on real studies? For the case in point, there are two clients I know of that both have old legacy code. They keep limping along with it because as one of them found out, a rewrite was a disaster, it was expensive and didn't really work to improve the code much. That customer has some very complicated business logic as the rewriters quickly found out. In both cases, these are mission critical applications that brings in a lot of revenue for the company. The one that attempted the rewrite felt that they would hit a brick wall at some point if the legacy software didn't get upgraded at some point in the future. To me, that kind of risk warrants research and analysis to ensure a successful path. My question is have there been actual case studies that have investigated this? I wouldn't want to attempt a major rewrite without knowing some best practices, pitfalls, and successes based on actual studies. Aftermath: okay, I was wrong, I did find one article: Rewrite or Reuse. They did a study on a Cobol app that was converted to Java.

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  • SQL SERVER – Load Generator – Free Tool From CodePlex

    - by pinaldave
    One of the most common questions I receive is if there any tool available to generate load on SQL Server. Absolutely there is a fabulous free tool available to generate load on SQL Server on Codeplex. This tool was released in 2008 but it is still extremely relevant to generate the load on SQL Server as well works fabulously. CodePlex is a project initiated by Microsoft for hosting open source softwares. The best part of this SQL Server Load Generator is that users can run multiple simultaneous queries again SQL Server using different login account and different application name. The interface of the tool is extremely easy to use and very intuitive as well. One of the things which I felt needed improvement was a default configuration. As every single time when I was adding a query the default settings were showing up and I had to manually change that. However, when I went to Menu >> Tools >>Options I was really happy as it has options to change every single default which is available. Here one can give default username, password, database name as well various settings related to configuration. Additionally application logging is also possible through the options. A couple of other important points I noticed was the button to reset counters as well status bar containing useful information of Total Threads, Completed Queries and Failed Queries. I use this frequently for my load testing. What tool do you use for SQL Server Load Generator? Download SQL Load Generator Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Utility, T SQL, Technology

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