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  • Silverlight Cream for April 02, 2010 -- #828

    - by Dave Campbell
    In this Issue: Phil Middlemiss, Robert Kozak, Kathleen Dollard, Avi Pilosof, Nokola, Jeff Wilcox, David Anson, Timmy Kokke, Tim Greenfield, and Josh Smith. Shoutout: SmartyP has additional info up on his WP7 Pivot app: Preview of My Current Windows Phone 7 Pivot Work From SilverlightCream.com: A Chrome and Glass Theme - Part I Phil Middlemiss is starting a tutorial series on building a new theme for Silverlight, in this first one we define some gradients and color resources... good stuff Phil Intercepting INotifyPropertyChanged This is Robert Kozak's first post on this blog, but it's a good one about INotifyPropertyChanged and MVVM and has a solution in the post with lots of code and discussion. How do I Display Data of Complex Bound Criteria in Horizontal Lists in Silverlight? Kathleen Dollard's latest article in Visual Studio magazine is in answer to a question about displaying a list of complex bound criteria including data, child data, and photos, and displaying them horizontally one at a time. Very nice-looking result, and all the code. Windows Phone: Frame/Page navigation and transitions using the TransitioningContentControl Avi Pilosof discusses the built-in (boring) navigation on WP7, and then shows using the TransitionContentControl from the Toolkit to apply transitions to the navigation. EasyPainter: Cloud Turbulence and Particle Buzz Nokola returns with a couple more effects for EasyPainter: Cloud Turbulence and Particle Buzz ... check out the example screenshots, then go grab the code. Property change notifications for multithreaded Silverlight applications Jeff Wilcox is discussing the need for getting change notifications to always happen on the UI thread in multi-threaded apps... great diagrams to see what's going on. Tip: The default value of a DependencyProperty is shared by all instances of the class that registers it David Anson has a tip up about setting the default value of a DependencyProperty, and the consequence that may have depending upon the type. Building a “real” extension for Expression Blend Timmy Kokke's code is WPF, but the subject is near and dear to us all, Timmy has a real-world Expression Blend extension up... a search for controls in the Objects and Timelines pane ... and even if that doesn't interest you... it's the source to a Blend extension! XPath support in Silverlight 4 + XPathPad Tim Greenfield not only talks about XPath in SL4RC, but he has produced a tool, XPathPad, and provided the source... if you've used XPath, you either are a higher thinker than me(not a big stretch), or you need this :) Using a Service Locator to Work with MessageBoxes in an MVVM Application Josh Smith posted about a question that comes up a lot: showing a messagebox from a ViewModel object. This might not work for custom message boxes or unit testing. This post covers the Unit Testing aspect. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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  • What is SharePoint Out of the Box?

    - by Bil Simser
    It’s always fun in the blog-o-sphere and SharePoint bloggers always keep the pot boiling. Bjorn Furuknap recently posted a blog entry titled Why Out-of-the-Box Makes No Sense in SharePoint, quickly followed up by a rebuttal by Marc Anderson on his blog. Okay, now that we have all the players and the stage what’s the big deal? Bjorn started his post saying that you don’t use “out-of-the-box” (OOTB) SharePoint because it makes no sense. I have to disagree with his premise because what he calls OOTB is basically installing SharePoint and admiring it, but not using it. In his post he lays claim that modifying say the OOTB contacts list by removing (or I suppose adding) a column, now puts you in a situation where you’re no longer using the OOTB functionality. Really? Side note. Dear Internet, please stop comparing building software to building houses. Or comparing software architecture to building architecture. Or comparing web sites to making dinner. Are you trying to dumb down something so the general masses understand it? Comparing a technical skill to a construction operation isn’t the way to do this. Last time I checked, most people don’t know how to build houses and last time I checked people reading technical SharePoint blogs are generally technical people that understand the terms you use. Putting metaphors around software development to make it easy to understand is detrimental to the goal. </rant> Okay, where were we? Right, adding columns to lists means you are no longer using the OOTB functionality. Yeah, I still don’t get it. Another statement Bjorn makes is that using the OOTB functionality kills the flexibility SharePoint has in creating exactly what you want. IMHO this really flies in the absolute face of *where* SharePoint *really* shines. For the past year or so I’ve been leaning more and more towards OOTB solutions over custom development for the simple reason that its expensive to maintain systems and code and assets. SharePoint has enabled me to do this simply by providing the tools where I can give users what they need without cracking open up Visual Studio. This might be the fact that my day job is with a regulated company and there’s more scrutiny with spending money on anything new, but frankly that should be the position of any responsible developer, architect, manager, or PM. Do you really want to throw money away because some developer tells you that you need a custom web part when perhaps with some creative thinking or expectation setting with customers you can meet the need with what you already have. The way I read Bjorn’s terminology of “out-of-the-box” is install the software and tell people to go to a website and admire the OOTB system, but don’t change it! For those that know things like WordPress, DotNetNuke, SubText, Drupal or any of those content management/blogging systems, its akin to installing the software and setting up the “Hello World” blog post or page, then staring at it like it’s useful. “Yes, we are using WordPress!”. Then not adding a new post, creating a new category, or adding an About page. Perhaps I’m wrong in my interpretation. This leads us to what is OOTB SharePoint? To many people I’ve talked to the last few hours on twitter, email, etc. it is *not* just installing software but actually using it as it was fit for purpose. What’s the purpose of SharePoint then? It has many purposes, but using the OOTB templates Microsoft has given you the ability to collaborate on projects, author/share/publish documents, create pages, track items/contacts/tasks/etc. in a multi-user web based interface, and so on. Microsoft has pretty clear definitions of these different levels of SharePoint we’re talking about and I think it’s important for everyone to know what they are and what they mean. Personalization and Administration To me, this is the OOTB experience. You install the product and then are able to do things like create new lists, sites, edit and personalize pages, create new views, etc. Basically use the platform services available to you with Windows SharePoint Services (or SharePoint Foundation in 2010) to your full advantage. No code, no special tools needed, and very little user training required. Could you take someone who has never done anything in a website or piece of software and unleash them onto a site? Probably not. However I would argue that anyone who’s configured the Outlook reading layout or applied styles to a Word document probably won’t have too much difficulty in using SharePoint OUT OF THE BOX. Customization Here’s where things might get a bit murky but to me this is where you start looking at HTML/ASPX page code through SharePoint Designer, using jQuery scripts and plugging them into Web Part Pages via a Content Editor Web Part, and generally enhancing the site. The JavaScript debate might kick in here claiming it’s no different than C#, and frankly you can totally screw a site up with jQuery on a CEWP just as easily as you can with a C# delegate control deployed to the server file system. However (again, my blog, my opinion) the customization label comes in when I need to access the server (for example creating a custom theme) or have some kind of net-new element I add to the system that wasn’t there OOTB. It’s not content (like a new list or site), it’s code and does something functional. Development Here’s were the propeller hats come on and we’re talking algorithms and unit tests and compilers oh my. Software is deployed to the server, people are writing solutions after some kind of training (perhaps), there might be some specialized tools they use to craft and deploy the solutions, there’s the possibility of exceptions being thrown, etc. There are a lot of definitions here and just like customization it might get murky (do you let non-developers build solutions using development, i.e. jQuery/C#?). In my experience, it’s much more cost effective keeping solutions under the first two umbrellas than leaping into the third one. Arguably you could say that you can’t build useful solutions without *some* kind of code (even just some simple jQuery). I think you can get a *lot* of value just from using the OOTB experience and I don’t think you’re constraining your users that much. I’m not saying Marc or Bjorn are wrong. Like Obi-Wan stated, they’re both correct “from a certain point of view”. To me, SharePoint Out of the Box makes total sense and should not be dismissed. I just don’t agree with the premise that Bjorn is basing his statements on but that’s just my opinion and his is different and never the twain shall meet.

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  • Rendering in WebKit

    Rendering in WebKit A deep dive into the guts of webkit. Eric Seidel explains the process from loading the resources, building the DOM tree, and the various trees involved in rendering. From: GoogleDevelopers Views: 4525 26 ratings Time: 34:45 More in Science & Technology

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  • SOA, Cloud and Service Technology Symposium a super success!

    - by JuergenKress
    SOA, Cloud and Service Technology Symposium in London was a huge success. More than 600 international attendees participated in it. Our SOA & BPM Community had a great presence there. At joint booth with the Specialized partners link consulting, eProseed and Griffiths Waite, we presented the latest product updates and had many interesting discussions with customers and speakers. Special thanks to our HQ product management team Demed, Tim, Manas for coming over right before OOW. Also a very big Thank to Matthias Ziegler from Accenture for presenting our joint presentation individually! If you missed the conference here are the key presentations links for your reference: Big Data and its impact on SOA Demed L'Her [View PDF] Building 21st Century Service-Oriented Airports Shyam Kumar [View PDF] Building Cloudy Services Anne Thomas Manes [View PDF] Community Management: The Next Wave of SOA Governance and API Management Tim E. Hall [View PDF] Elastic SOA in the Cloud Steve Millidge [View PDF] Governing Shared Services: On-Premise & In the Cloud Thomas Erl [View Video] Introducing the Cloud Computing Design Patterns Catalogue Thomas Erl and Amin Naserpour [CloudPatterns.org] Lost in Translation - Common Mistakes Interpreting Patterns Mark Simpson [View PDF] Moving Applications to the Cloud: Migration Options Anne Thomas Manes [View PDF] New Paradigms for Application Architecture: From Applications to IT Services Anne Thomas Manes [View PDF] NoSQL for Data Services, Data Virtualization & Big Data Guido Schmutz [View PDF] A Pragmatic Approach to Cloud Computing Andrea Morena [View PDF] The Successful Execution of the SOA and BPM Vision Using a Business Capability Framework: Concepts and Examples Clemens Utschig and Manas Deb [View PDF] Service Modeling & BPM Business Value Patterns Matthias Ziegler [View PDF] [Podcast] SOA Adoption in the Brazilian Ministry of Health - Case Study Ricardo Puttini and Andre Toffanello [PDF Coming Soon] SOA Environments are a Big Data Problem Markus Zirn, Splunk and Maciej Barcz [View PDF] SOA Governance at EDP: A Global Energy Company Manuel Rosa [View PDF] For all presentations please visit the SOA, Cloud and Service Technology Symposium Website SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: SOA Symposium,Thomas Erl,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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  • Windows CE training in Italy

    - by Valter Minute
    Se volete approfondire le vostre conoscenze su Windows CE (anche relativamente alle novità introdotte con la versione R3), o desiderate acquisire le basi per cominciare a lavorare con questo sistema operativo, questa è un'occasione da non perdere. Dal 12 al 16 Aprile si terrà presso gli uffici di Fortech Embedded Labs di Saronno (VA) il corso "Building Solutions with Windows Embedded CE 6.0", tenuto dal sottoscritto. Per maggiori informazioni sui contenuti e i costi: http://www.fortechembeddedlabs.it/node/27

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  • Install OpenOffice for headless use

    - by Subhransu
    The question very simple and short. I am following this article to install OpenOffice headless: sudo apt-get install openoffice.org-headless openoffice.org-writer openoffice.org-draw And I get the following error : Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package openoffice.org-headless E: Couldn't find any package by regex 'openoffice.org-headless' UPDATE: apt-cache search openoffice.org output: http://pastebin.ubuntu.com/1262902/

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  • Silverlight Cream for March 08, 2010 -- #809

    - by Dave Campbell
    In this Issue: Michael Washington, Tim Greenfield, Bobby Diaz(-2-), Glenn Block(-2-), Nikhil Kothari, Jianqiang Bao(-2-), and Christopher Bennage. Shoutouts: Adam Kinney announced a Big update for the Project Rosetta site today Arpit Gupta has opened a new blog with a great logo: I think therefore I am dangerous :) From SilverlightCream.com: DotNetNuke Silverlight Traffic Module If it's DNN and Silverlight, it has to be my buddy Michael Washington :) ... Michael has combined those stunning gauges you've seen with website traffic... just too cool!... grab the code and display yours too! Cool demonstration of Silverlight VideoBrush This is a no-code post by Tim Greenfield, but I like the UX on this Jigsaw Puzzle page... and you can make your own. Introducing the Earthquake Locator – A Bing Maps Silverlight Application, part 1 Bobby Diaz has an informative post up on combining earthquake data with BingMaps in Silverlight 3... check it out, the grab the recently posted Live Demo and Source Code Adding Volcanos and Options - Earthquake Locator, part 2 Bobby Diaz also added volcanic activity to his earthquake BinMaps app, and updated the downloadable code and live demo. Building Hello MEF – Part IV – DeploymentCatalog Glenn Block posted a pair of MEF posts yesterday... made me think I missed one :) .. the first one is about the DeploymentCatalog. Note he is going to be using the CodePlex bits in his posts. Building HelloMEF – Part V – Refactoring to ViewModel Glenn Block's part V is about MEF and MVVM -- no, really! ... he is refactoring MVVM into the app with a nod to Josh Smith and Laurent Bugnion... get your head around this... The Case for ViewModel Nikhil Kothari has a post up about the ViewModel, and how it facilitates designer/developer workflow, jumpstarts development, improves scaling, and makes asynch programming development simpler MMORPG programming in Silverlight Tutorial (12)Map Instance (Part I) Jianqiang Bao has part 12 of his MMORPG game up... this one is showing how to deal with obstuctions on maps. MMORPG programming in Silverlight Tutorial (13)Perfect moving mechanism Jianqiang Bao also has part 13 up, and this second one is about sprite movement around the obstructions. 1 Simple Step for Commanding in Silverlight Christopher Bennage blogged about Commanding in Silverlight, he begins with a blog post about commands in Silverlight 4 then goes on to demonstrate the Caliburn way of doing commanding. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    MIX10

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  • SQL SERVER – Step by Step Guide to Beginning Data Quality Services in SQL Server 2012 – Introduction to DQS

    - by pinaldave
    Data Quality Services is a very important concept of SQL Server. I have recently started to explore the same and I am really learning some good concepts. Here are two very important blog posts which one should go over before continuing this blog post. Installing Data Quality Services (DQS) on SQL Server 2012 Connecting Error to Data Quality Services (DQS) on SQL Server 2012 This article is introduction to Data Quality Services for beginners. We will be using an Excel file Click on the image to enlarge the it. In the first article we learned to install DQS. In this article we will see how we can learn about building Knowledge Base and using it to help us identify the quality of the data as well help correct the bad quality of the data. Here are the two very important steps we will be learning in this tutorial. Building a New Knowledge Base  Creating a New Data Quality Project Let us start the building the Knowledge Base. Click on New Knowledge Base. In our project we will be using the Excel as a knowledge base. Here is the Excel which we will be using. There are two columns. One is Colors and another is Shade. They are independent columns and not related to each other. The point which I am trying to show is that in Column A there are unique data and in Column B there are duplicate records. Clicking on New Knowledge Base will bring up the following screen. Enter the name of the new knowledge base. Clicking NEXT will bring up following screen where it will allow to select the EXCE file and it will also let users select the source column. I have selected Colors and Shade both as a source column. Creating a domain is very important. Here you can create a unique domain or domain which is compositely build from Colors and Shade. As this is the first example, I will create unique domain – for Colors I will create domain Colors and for Shade I will create domain Shade. Here is the screen which will demonstrate how the screen will look after creating domains. Clicking NEXT it will bring you to following screen where you can do the data discovery. Clicking on the START will start the processing of the source data provided. Pre-processed data will show various information related to the source data. In our case it shows that Colors column have unique data whereas Shade have non-unique data and unique data rows are only two. In the next screen you can actually add more rows as well see the frequency of the data as the values are listed unique. Clicking next will publish the knowledge base which is just created. Now the knowledge base is created. We will try to take any random data and attempt to do DQS implementation over it. I am using another excel sheet here for simplicity purpose. In reality you can easily use SQL Server table for the same. Click on New Data Quality Project to see start DQS Project. In the next screen it will ask which knowledge base to use. We will be using our Colors knowledge base which we have recently created. In the Colors knowledge base we had two columns – 1) Colors and 2) Shade. In our case we will be using both of the mappings here. User can select one or multiple column mapping over here. Now the most important phase of the complete project. Click on Start and it will make the cleaning process and shows various results. In our case there were two columns to be processed and it completed the task with necessary information. It demonstrated that in Colors columns it has not corrected any value by itself but in Shade value there is a suggestion it has. We can train the DQS to correct values but let us keep that subject for future blog posts. Now click next and keep the domain Colors selected left side. It will demonstrate that there are two incorrect columns which it needs to be corrected. Here is the place where once corrected value will be auto-corrected in future. I manually corrected the value here and clicked on Approve radio buttons. As soon as I click on Approve buttons the rows will be disappeared from this tab and will move to Corrected Tab. If I had rejected tab it would have moved the rows to Invalid tab as well. In this screen you can see how the corrected 2 rows are demonstrated. You can click on Correct tab and see previously validated 6 rows which passed the DQS process. Now let us click on the Shade domain on the left side of the screen. This domain shows very interesting details as there DQS system guessed the correct answer as Dark with the confidence level of 77%. It is quite a high confidence level and manual observation also demonstrate that Dark is the correct answer. I clicked on Approve and the row moved to corrected tab. On the next screen DQS shows the summary of all the activities. It also demonstrates how the correction of the quality of the data was performed. The user can explore their data to a SQL Server Table, CSV file or Excel. The user also has an option to either explore data and all the associated cleansing info or data only. I will select Data only for demonstration purpose. Clicking explore will generate the files. Let us open the generated file. It will look as following and it looks pretty complete and corrected. Well, we have successfully completed DQS Process. The process is indeed very easy. I suggest you try this out yourself and you will find it very easy to learn. In future we will go over advanced concepts. Are you using this feature on your production server? If yes, would you please leave a comment with your environment and business need. It will be indeed interesting to see where it is implemented. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Business Intelligence, Data Warehousing, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology Tagged: Data Quality Services, DQS

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  • Architects overcoming challenges in the cloud

    - by stephen.g.bennett
    Computerworld has released an article based on an Silver Clouds, Dark Linings : A Concise Guide to Cloud Computing. This exceprt is from the roadmap chapter of the book. The book highlights common techniques in building roadmaps such as current reality, future vision, gap analysis, roadmap but also goes into detail in identifying the type of organization you are and what the common challenges you will need to address within your roadmap. In addition over at ArchBeat they have released a four part interview dicussing the book. Have a happy holiday

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  • NDC2010: Rob Conery I cant hear you, there is an ORM in my ear

    In this session Rob Conery tried to show of the new Shiny toy NoSQL in as many forms as possible, discussing the pros and and some cons. He based much of the talk on his experiences with building TekPub and the requirements they had around that. He tried to illustrate that this wasnt a magical [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Daily tech links for .net and related technologies - May 26-29, 2010

    - by SanjeevAgarwal
    Daily tech links for .net and related technologies - May 26-29, 2010 Web Development Porting MVC Music Store to Raven: StoreController - Ayende Building a Store Locator ASP.NET Application Using Google Maps API - Scott Mitchell Anti-Forgery Request Recipes For ASP.NET MVC And AJAX - Dixin How to Localize an ASP.NET MVC Application - Michael Ceranski Tekpub ASP.NET MVC 2 Starter Site 0.5 Released - Rob Conery How to use Google Data API in ASP.NET MVC. Part 2 - Mahdi jQuery.validate and Html.ValidationSummary...(read more)

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  • How to deal with a poor team leader and a tester manager from hell? [closed]

    - by Google
    Let me begin by explaining my situation and give a little context to the situation. My company has around 15 developers but we're split up on two different areas. We have a fresh product team and the old product team. The old product team does mostly bug fixes/maintenance and a feature here and there. The fresh product had never been released and was new from the ground up. I am on the fresh product team. The team consists of three developers (myself, another developer and a senior developer). The senior is also our team leader. Our roles are as follows: Myself: building the administration client as well as build/release stuff Other dev: building the primary client Team lead: building the server In addition to the dev team, we interact with the test manager often. By "we" I mean me since I do the build stuff and give him the builds to test. Trial 1: The other developer on my team and I have both tried to talk to our manager about our team leader. About two weeks before release we went in his office and had a closed door meeting before our team lead got to work. We expressed our concerns about the product, its release date and our team leader. We expressed our team leader had a "rosey" image of the product's state. Our manager seemed to listen to what we said and thanked us for taking the initiative to speak with him about it. He got us an extra two weeks before release. The situation with the leader didn't change. In fact, it got a little worse. While we were using the two weeks to fix issues he was slacking off quite a bit. Just to name a few things, he installed Windows 8 on his dev machine during this time (claimed him machine was broke), he wrote a plugin for our office messenger that turned turned messages into speech, and one time when I went in his office he was making a 3D model in Blender (for "fun"). He felt the product was "pretty good" and ready for release. During this time I dealt with the test manager on a daily basis. Every bug or issue that popped up he would pretty much attack me personally (regardless of which component the bug was in). The test manager would often push his "views" of what needed to be done with the product. He virtually ordered me to change text on our installer and to add features to the installer and administration client. I tried to express how his suggestions were "valid ideas" but it was too close to release to do those kinds of things and to make matters worse, our technical writer had already finished documentation and such a change would not only affect the dev team but would affect the technical writer and marketing as well. I expressed I wasn't going to make those changes without marketing's consent as well as the technical writer and my manager's. He pretty much said I don't care about the product and said I don't do my job. I would like to take a moment to say I take my job seriously and I do my best. I am the kind of person that goes to work 30-40 mins early and usually leaves 30 minutes later than everyone else. Saying I don't care or do my job is just insulting. His "attacks" on me grew from day to day. Every bug that popped up he would usually comment on in some manner that jabbed me and the other developer. "Oh that bug! Yeah that should have been fixed by now, figures! If someone would do their job!" and other similar kinds of comments. Keep in mind 8 out of 10 bugs were in the server and had nothing to do with me and the other developer. That didn't seem to matter.. On one occasion they got pretty bad and we almost got into a yelling match so I decided to stop talking to him all together. I carried all communication through office email (with my manager cc'd). He never attacked me via email. He still attempted to get aggressive with me in person but I completely ignore him and my only response to any question is, "Ask my team leader." or "Ask a product manager." The product launched after our two week extension. Trial 2: The day after the product launch our team leader went on vacation (thanks....). At this time we got a lot of questions from the tech support... major issues with the product. All of these issues were bugs marked "resolved" by our lovely team leader (a typical situation that often popped up). This is where we currently are. The other developer has been with the company for about three years (I've been there only five months) and told me he was going to speak with our manager alone and hoped it would help get our concerns across a little better in a one-on-one. He spoke with the manager and directly addressed all of our concerns regarding our team leader and the test manager giving us (mostly me) hell. Our manager basically said he understood how hard we work and said he noticed it and there's no doubt about it. He said he spoke with the test manager about his temper. Regarding the team leader, he didn't say a whole lot. He suggested we sit down with the team leader and address our concerns (isn't that the manager's job?). We're still waiting to see if anything has changed but we doubt it. What can we do next? 1) Talk to the team leader (may stress relationship and make work awkward) I admit the team leader is generally a nice guy. He is just a horrible leader and working closely with him is painful. I still don't believe bringing this directly to the team leader would help at all and may negatively impact the situation. 2) I could quit. Other than this situation the job is pretty fantastic. I really like my other coworkers and we have quite a bit of freedom. 3) I could take the situation with the team leader to one of the owners. I would then be throwing my manager under the bus. 4) I could take the situation with the test manager to HR. Any suggestions? Comments?

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  • Install OOo for headless use

    - by Subhransu
    The question very simple and short. I am following this article to install OpenOfficle headless: sudo apt-get install openoffice.org-headless openoffice.org-writer openoffice.org-draw And I get the following error : Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package openoffice.org-headless E: Couldn't find any package by regex 'openoffice.org-headless'

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  • SQL SERVER – SQL in Sixty Seconds – Last Three Episodes – Need Your Opinion

    - by Pinal Dave
    I have been blogging for almost 7 years and building video content for around 2 years. After spending so much time on blogging and creating video, I have got the quite a good idea what people would like to read and what people like to watch. However, there is one thing, which I am constantly struggling after almost a year and I would like to get your opinion about it. Though, this may look very simple to you but it is very crucial to me and I would like to know your opinion about it. I have been building video almost every week for my SQL in Sixty Seconds series and it has been quite popular. So far on my YouTube Channel there are over 2600 subscribers and over 250K views. Here is my problem – there are about 50+ videos on SQL in Sixty Seconds Series but the not every video is popular. There are a few videos which are extremely popular and there are videos which are absolutely struggling to get even single view. I have yet not figured out what people would love to watch on this channel. I noticed lots of people watching various videos but hardly anyone leaving comments or suggestions. At the end of the blog posts associated with the SQL in Sixty Seconds, I always ask which video people would love to watch, but I get a very low response over there too. What I wonder is that why such a low engagement of viewers/readers on the video blog posts where as the channel is success and lots of people are watching the video? What do you think I should change in my video to increase the engagement? Here are my last three videos from SQL in Sixty Seconds channel and I would like to know your feedback. Remove Cached Login from SSMS Connect Dialog – SQL in Sixty Seconds #049 RESEED Identity Column in Database Table – SQL in Sixty Seconds #051 Puzzle SET ANSI_NULLS and Resultset – SQL in Sixty Seconds #052  The feedback which I will like the most will for sure get a special surprise gift for me. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL in Sixty Seconds, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology, Video

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  • How do I fix dependency problems with the kernel in apt?

    - by Jon
    When trying to install new packages, either manually or with muon, I get these errors: jon@jon-desktop:~/Apps/mendeleydesktop-1.5-dev4-linux-x86_64/bin$ sudo apt-get install kupfer [sudo] password for jon: Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: kupfer : Depends: python-keybinder but it is not going to be installed Recommends: python-wnck but it is not going to be installed linux-headers-generic : Depends: linux-headers-3.2.0-20-generic but it is not installable linux-image-generic : Depends: linux-image-3.2.0-20-generic but it is not installable E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). jon@jon-desktop:~/Apps/mendeleydesktop-1.5-dev4-linux-x86_64/bin$ sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following extra packages will be installed: linux-generic linux-headers-generic linux-image-generic The following packages will be upgraded: linux-generic linux-headers-generic linux-image-generic 3 upgraded, 0 newly installed, 0 to remove and 2 not upgraded. 3 not fully installed or removed. Need to get 0 B/6,658 B of archives. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? dpkg: dependency problems prevent configuration of linux-image-generic: linux-image-generic depends on linux-image-3.2.0-20-generic; however: Package linux-image-3.2.0-20-generic is not installed. dpkg: error processing linux-image-generic (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. dpkg: dependency problems prevent configuration of linux-generic: linux-generic depends on linux-image-generic (= 3.2.0.20.22); however: Package linux-image-generic is not configured yet. dpkg: error processing linux-generic (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. dpkg: dependency problems prevent configuration of linux-headers-generic: linux-headers-generic depends on linux-headers-3.2.0-20-generic; however: Package linux-headers-3.2.0-20-generic is not installed. dpkg: error processing linux-headers-generic (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: linux-image-generic linux-generic linux-headers-generic E: Sub-process /usr/bin/dpkg returned an error code (1) As indicated above, I ran sudo apt-get -f install but it still tells me there are dependency issues.

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  • Laser Beam End Points Problems

    - by user36159
    I am building a game in XNA that features colored laser beams in 3D space. The beams are defined as: Segment start position Segment end position Line width For rendering, I am using 3 quads: Start point billboard End point billboard Middle section quad whose forward vector is the slope of the line and whose normal points to the camera The problem is that using additive blending, the end points and middle section overlap, which looks quite jarring. However, I need the endpoints in case the laser is pointing towards the camera! See the blue laser in particular:

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  • NDC 2010: Eric Evans -What I learned since the book

    This was one of the most rewarding sessions for me. Eric Evans explained what he picked up and learned since he wrote the book, what parts that he realized was more important that he initially thought and what parts had been missing. A missing building block: Domain Events [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • How to deal with configuration style warnings occuring from TexLive 2012 installation?

    - by JJD
    I followed the advice of izx on how to install TexLive 2012 using the texlive-backports PPA. Before I started I removed all TexLive-related packages. The installation finished and everything seems to work fine. The only thing I noticed are some warnings in the output of the installer. Here is an excerpt of the output: Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg There are more of that kind in the rest of the output: $ sudo apt-get install texlive Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: latex-beamer latex-xcolor libgraphite3 libkpathsea6 libptexenc1 lmodern pgf prosper ps2eps tex-common tex-gyre texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-fonts-recommended-doc texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-recommended texlive-latex-recommended-doc texlive-pstricks texlive-pstricks-doc tipa ttf-marvosym Suggested packages: texlive-doc-en purifyeps chktex latexmk dvipng xindy dvidvi fragmaster lacheck latexdiff t1utils The following NEW packages will be installed: latex-beamer latex-xcolor libgraphite3 libkpathsea6 libptexenc1 lmodern pgf prosper ps2eps tex-common tex-gyre texlive texlive-base texlive-binaries texlive-common texlive-doc-base texlive-extra-utils texlive-font-utils texlive-fonts-recommended texlive-fonts-recommended-doc texlive-generic-recommended texlive-latex-base texlive-latex-base-doc texlive-latex-recommended texlive-latex-recommended-doc texlive-pstricks texlive-pstricks-doc tipa ttf-marvosym 0 upgraded, 29 newly installed, 0 to remove and 17 not upgraded. Need to get 0 B/274 MB of archives. After this operation, 450 MB of additional disk space will be used. Do you want to continue [Y/n]? Preconfiguring packages ... Selecting previously unselected package tex-common. (Reading database ... 290206 files and directories currently installed.) Unpacking tex-common (from .../tex-common_3.13~ubuntu12.04.1_all.deb) ... Selecting previously unselected package lmodern. Unpacking lmodern (from .../lmodern_2.004.1-5~precise1_all.deb) ... Selecting previously unselected package tex-gyre. Unpacking tex-gyre (from .../tex-gyre_2.004.1-4~precise1_all.deb) ... Selecting previously unselected package libgraphite3. Unpacking libgraphite3 (from .../libgraphite3_1%3a2.3.1-0.2build1_amd64.deb) ... Selecting previously unselected package libkpathsea6. Unpacking libkpathsea6 (from .../libkpathsea6_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package libptexenc1. Unpacking libptexenc1 (from .../libptexenc1_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package texlive-common. Unpacking texlive-common (from .../texlive-common_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-binaries. Unpacking texlive-binaries (from .../texlive-binaries_2012.20120628-1~ubuntu12.04.1_amd64.deb) ... Selecting previously unselected package texlive-doc-base. Unpacking texlive-doc-base (from .../texlive-doc-base_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-base. Unpacking texlive-base (from .../texlive-base_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-base. Unpacking texlive-latex-base (from .../texlive-latex-base_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-recommended. Unpacking texlive-latex-recommended (from .../texlive-latex-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package latex-xcolor. Unpacking latex-xcolor (from .../latex-xcolor_2.11-1_all.deb) ... Selecting previously unselected package pgf. Unpacking pgf (from .../archives/pgf_2.10-1_all.deb) ... Selecting previously unselected package latex-beamer. Unpacking latex-beamer (from .../latex-beamer_3.10-1_all.deb) ... Selecting previously unselected package texlive-generic-recommended. Unpacking texlive-generic-recommended (from .../texlive-generic-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-pstricks. Unpacking texlive-pstricks (from .../texlive-pstricks_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package prosper. Unpacking prosper (from .../prosper_1.00.4+cvs.2007.05.01-4_all.deb) ... Selecting previously unselected package ps2eps. Unpacking ps2eps (from .../ps2eps_1.68-1_amd64.deb) ... Selecting previously unselected package ttf-marvosym. Unpacking ttf-marvosym (from .../ttf-marvosym_0.1+dfsg-2_all.deb) ... Selecting previously unselected package texlive-fonts-recommended. Unpacking texlive-fonts-recommended (from .../texlive-fonts-recommended_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive. Unpacking texlive (from .../texlive_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-extra-utils. Unpacking texlive-extra-utils (from .../texlive-extra-utils_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-font-utils. Unpacking texlive-font-utils (from .../texlive-font-utils_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-fonts-recommended-doc. Unpacking texlive-fonts-recommended-doc (from .../texlive-fonts-recommended-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-base-doc. Unpacking texlive-latex-base-doc (from .../texlive-latex-base-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-latex-recommended-doc. Unpacking texlive-latex-recommended-doc (from .../texlive-latex-recommended-doc_2012.20120611-3~ubuntu12.04.1_all.deb) ... Selecting previously unselected package texlive-pstricks-doc. Unpacking texlive-pstricks-doc (from .../texlive-pstricks-doc_2012.20120611-1~ubuntu12.04.1_all.deb) ... Selecting previously unselected package tipa. Unpacking tipa (from .../tipa_2%3a1.3-17~precise1_all.deb) ... Processing triggers for doc-base ... Processing 5 added doc-base files... Registering documents with scrollkeeper... Processing triggers for man-db ... Processing triggers for fontconfig ... Processing triggers for install-info ... Setting up tex-common (3.13~ubuntu12.04.1) ... Running mktexlsr. This may take some time... done. texlive-base is not ready, delaying updmap-sys call texlive-base is not ready, skipping fmtutil-sys --all call Setting up lmodern (2.004.1-5~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up tex-gyre (2.004.1-4~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up libgraphite3 (1:2.3.1-0.2build1) ... Setting up libkpathsea6 (2012.20120628-1~ubuntu12.04.1) ... Setting up libptexenc1 (2012.20120628-1~ubuntu12.04.1) ... Setting up texlive-common (2012.20120611-3~ubuntu12.04.1) ... Setting up texlive-binaries (2012.20120628-1~ubuntu12.04.1) ... update-alternatives: using /usr/bin/xdvi-xaw to provide /usr/bin/xdvi.bin (xdvi.bin) in auto mode. update-alternatives: using /usr/bin/bibtex.original to provide /usr/bin/bibtex (bibtex) in auto mode. mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Building format(s) --refresh. This may take some time... done. Setting up texlive-doc-base (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up ps2eps (1.68-1) ... Setting up ttf-marvosym (0.1+dfsg-2) ... Setting up texlive-fonts-recommended-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-base-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-recommended-doc (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-pstricks-doc (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. texlive-base is not ready, delaying updmap-sys call Setting up texlive-base (2012.20120611-3~ubuntu12.04.1) ... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. /usr/bin/tl-paper: setting paper size for dvips to a4. /usr/bin/tl-paper: setting paper size for dvipdfmx to a4. /usr/bin/tl-paper: setting paper size for xdvi to a4. /usr/bin/tl-paper: setting paper size for pdftex to a4. Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Building format(s) --all. This may take some time... done. Processing triggers for tex-common ... Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up texlive-generic-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-fonts-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-extra-utils (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-font-utils (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-base (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Building format(s) --all --cnffile /etc/texmf/fmt.d/10texlive-latex-base.cnf. This may take some time... done. Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up texlive-pstricks (2012.20120611-1~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up tipa (2:1.3-17~precise1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Setting up texlive-latex-recommended (2012.20120611-3~ubuntu12.04.1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Running updmap-sys. This may take some time... done. Running mktexlsr /var/lib/texmf ... done. Setting up prosper (1.00.4+cvs.2007.05.01-4) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Running mktexlsr. This may take some time... done. Setting up texlive (2012.20120611-3~ubuntu12.04.1) ... Setting up latex-xcolor (2.11-1) ... mktexlsr: Updating /usr/local/share/texmf/ls-R... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Setting up pgf (2.10-1) ... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg Processing triggers for tex-common ... Running mktexlsr. This may take some time... done. Setting up latex-beamer (3.10-1) ... mktexlsr: Updating /usr/local/share/texmf/ls-R... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEMAIN... mktexlsr: Updating /var/lib/texmf/ls-R-TEXLIVEDIST... mktexlsr: Updating /var/lib/texmf/ls-R-TEXMFMAIN... mktexlsr: Updating /var/lib/texmf/ls-R... mktexlsr: Done. Processing triggers for libc-bin ... ldconfig deferred processing now taking place What exactly is 10lmodern.cfg good for? How can I prevent this warnings? Here is the output of sudo update-updmap: $ sudo update-updmap Regenerating '/var/lib/texmf/updmap.cfg-DEBIAN'... Warning: Old configuration style found in /etc/texmf/updmap.d Warning: For now these files have been included, Warning: but expect inconsistencies. Warning: These packages should be rebuild with tex-common. Warning: Please see /usr/share/doc/tex-common/NEWS.Debian.gz Warning: found file: /etc/texmf/updmap.d/10lmodern.cfg done. Regenerating '/var/lib/texmf/updmap.cfg-TEXLIVEDIST'... done. update-updmap has updated the following file(s): /var/lib/texmf/updmap.cfg-DEBIAN /var/lib/texmf/updmap.cfg-TEXLIVEDIST If you want to enable the map files with this new file, you should run updmap-sys or updmap.

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  • O&rsquo;Reilly Deal of the Day 10/June/2014 - AngularJS Directives

    - by TATWORTH
    Originally posted on: http://geekswithblogs.net/TATWORTH/archive/2014/06/10/orsquoreilly-deal-of-the-day-10june2014---angularjs-directives.aspxToday’s half-price E-Book offer from O’Reilly at http://shop.oreilly.com/product/9781783280339.do is AngularJS Directives. “AngularJS, propelled by Google, is quickly becoming one of the most popular JavaScript MVC frameworks available, working to invert the development paradigm and bring data-driven modularity to the web frontend. Directives serve as the core building blocks in AngularJS and enable you to create reusable models that mold around your data structures and breathe new life into the intersection of HTML and JavaScript.”

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  • API Message Localization

    - by Jesse Taber
    In my post, “Keep Localizable Strings Close To Your Users” I talked about the internationalization and localization difficulties that can arise when you sprinkle static localizable strings throughout the different logical layers of an application. The main point of that post is that you should have your localizable strings reside as close to the user-facing modules of your application as possible. For example, if you’re developing an ASP .NET web forms application all of the localizable strings should be kept in .resx files that are associated with the .aspx views of the application. In this post I want to talk about how this same concept can be applied when designing and developing APIs. An API Facilitates Machine-to-Machine Interaction You can typically think about a web, desktop, or mobile application as a collection “views” or “screens” through which users interact with the underlying logic and data. The application can be designed based on the assumption that there will be a human being on the other end of the screen working the controls. You are designing a machine-to-person interaction and the application should be built in a way that facilitates the user’s clear understanding of what is going on. Dates should be be formatted in a way that the user will be familiar with, messages should be presented in the user’s preferred language, etc. When building an API, however, there are no screens and you can’t make assumptions about who or what is on the other end of each call. An API is, by definition, a machine-to-machine interaction. A machine-to-machine interaction should be built in a way that facilitates a clear and unambiguous understanding of what is going on. Dates and numbers should be formatted in predictable and standard ways (e.g. ISO 8601 dates) and messages should be presented in machine-parseable formats. For example, consider an API for a time tracking system that exposes a resource for creating a new time entry. The JSON for creating a new time entry for a user might look like: 1: { 2: "userId": 4532, 3: "startDateUtc": "2012-10-22T14:01:54.98432Z", 4: "endDateUtc": "2012-10-22T11:34:45.29321Z" 5: }   Note how the parameters for start and end date are both expressed as ISO 8601 compliant dates in UTC. Using a date format like this in our API leaves little room for ambiguity. It’s also important to note that using ISO 8601 dates is a much, much saner thing than the \/Date(<milliseconds since epoch>)\/ nonsense that is sometimes used in JSON serialization. Probably the most important thing to note about the JSON snippet above is the fact that the end date comes before the start date! The API should recognize that and disallow the time entry from being created, returning an error to the caller. You might inclined to send a response that looks something like this: 1: { 2: "errors": [ {"message" : "The end date must come after the start date"}] 3: }   While this may seem like an appropriate thing to do there are a few problems with this approach: What if there is a user somewhere on the other end of the API call that doesn’t speak English?  What if the message provided here won’t fit properly within the UI of the application that made the API call? What if the verbiage of the message isn’t consistent with the rest of the application that made the API call? What if there is no user directly on the other end of the API call (e.g. this is a batch job uploading time entries once per night unattended)? The API knows nothing about the context from which the call was made. There are steps you could take to given the API some context (e.g.allow the caller to send along a language code indicating the language that the end user speaks), but that will only get you so far. As the designer of the API you could make some assumptions about how the API will be called, but if we start making assumptions we could very easily make the wrong assumptions. In this situation it’s best to make no assumptions and simply design the API in such a way that the caller has the responsibility to convey error messages in a manner that is appropriate for the context in which the error was raised. You would work around some of these problems by allowing callers to add metadata to each request describing the context from which the call is being made (e.g. accepting a ‘locale’ parameter denoting the desired language), but that will add needless clutter and complexity. It’s better to keep the API simple and push those context-specific concerns down to the caller whenever possible. For our very simple time entry example, this can be done by simply changing our error message response to look like this: 1: { 2: "errors": [ {"code": 100}] 3: }   By changing our error error from exposing a string to a numeric code that is easily parseable by another application, we’ve placed all of the responsibility for conveying the actual meaning of the error message on the caller. It’s best to have the caller be responsible for conveying this meaning because the caller understands the context much better than the API does. Now the caller can see error code 100, know that it means that the end date submitted falls before the start date and take appropriate action. Now all of the problems listed out above are non-issues because the caller can simply translate the error code of ‘100’ into the proper action and message for the current context. The numeric code representation of the error is a much better way to facilitate the machine-to-machine interaction that the API is meant to facilitate. An API Does Have Human Users While APIs should be built for machine-to-machine interaction, people still need to wire these interactions together. As a programmer building a client application that will consume the time entry API I would find it frustrating to have to go dig through the API documentation every time I encounter a new error code (assuming the documentation exists and is accurate). The numeric error code approach hurts the discoverability of the API and makes it painful to integrate with. We can help ease this pain by merging our two approaches: 1: { 2: "errors": [ {"code": 100, "message" : "The end date must come after the start date"}] 3: }   Now we have an easily parseable numeric error code for the machine-to-machine interaction that the API is meant to facilitate and a human-readable message for programmers working with the API. The human-readable message here is not intended to be viewed by end-users of the API and as such is not really a “localizable string” in my opinion. We could opt to expose a locale parameter for all API methods and store translations for all error messages, but that’s a lot of extra effort and overhead that doesn’t add a lot real value to the API. I might be a bit of an “ugly American”, but I think it’s probably fine to have the API return English messages when the target for those messages is a programmer. When resources are limited (which they always are), I’d argue that you’re better off hard-coding these messages in English and putting more effort into building more useful features, improving security, tweaking performance, etc.

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