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  • TechDays 2010: What’s New On C# 4.0

    - by Paulo Morgado
    I would like to thank those that attended my session at TechDays 2010 and I hope that I was able to pass the message of what’s new on C#. For those that didn’t attend (or did and want to review it), the presentation can be downloaded from here. Code samples can be downlaoded from here. Here’s a list of resources mentioned on the session: The evolution of C# The Evolution Of C# Covariance and contravariance  C# 4.0: Covariance And Contravariance In Generics Covariance And Contravariance In Generics Made Easy Covarince and Contravariance in Generics Exact rules for variance validity Events get a little overhaul in C# 4, Afterward: Effective Events Named and optional arguments  Named And Optional Arguments Alternative To Optional Arguments Named and Optional Arguments (C# Programming Guide) Dynamic programming  Dynamic Programming C# Proposal: Compile Time Static Checking Of Dynamic Objects Using Type dynamic (C# Programming Guide) Dynamic Language Runtime Overview COM Interop Improvements COM Interop Improvements Type Equivalence and Embedded Interop Types Conclusion Visual C# Developer Center Visual C# 2010 Samples C# Language Specification 4.0 .NET Reflector LINQPad

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  • Help with algorithmic complexity in custom merge sort implementation

    - by bitcycle
    I've got an implementation of the merge sort in C++ using a custom doubly linked list. I'm coming up with a big O complexity of n^2, based on the merge_sort() slice operation. But, from what I've read, this algorithm should be n*log(n), where the log has a base of two. Can someone help me determine if I'm just determining the complexity incorrectly, or if the implementation can/should be improved to achieve n*log(n) complexity? If you would like some background on my goals for this project, see my blog. I've added comments in the code outlining what I understand the complexity of each method to be. Clarification - I'm focusing on the C++ implementation with this question. I've got another implementation written in Python, but that was something that was added in addition to my original goal(s).

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  • Empathy chat limits the number of contacts displayed?

    - by Ka7anax
    I'm using Empathy Chat with these accounts: GTalk & Facebook. I just noticed now that from my GTalk friends only 6 appear online (including me) and in reality online are 14 (checked on GMail). And from Facebook it displays 44. So is Empathy Chat limited to display only 50 contacts? I looked through the settings and didn't see anything like this :| The worst part is that I have 1 GTalk contact as Favorite and it's not in the list... Is it a bug? PS: I'm using Ubuntu 10.10

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  • How do I ask google not to index certain parts of my page?

    - by Gavin Mannion
    I was searching for an old review on my site today and I noticed that Google is indexing the headline text in my latest article list on every page that it appears, obviously I guess. The problem is if I search for my Dragon's Lair review specifically to my site like this http://www.google.co.za/search?sugexp=chrome,mod=9&sourceid=chrome&ie=UTF-8&q=site%3Alazygamer.net+dragons+lair+review Then it returns a ton of pages that aren't appropriate as they aren't related to the review at all. The reason why I care is that I have a second Dragon's Lair review that was posted years ago and now I can't find it. Is there a way to hint to google that certain text isn't relevant to the actual content on the page? is it a terrible idea?

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  • New games for 2011

    - by Oli
    I know there have been other questions like "What native games are available?" and they often have issues because they turn into a never-ending list of every game ever released for Linux. But I'd like to know what's coming out this year. Good answers can include: A game that's coming out in 2011 A Linux port being released for games that might be older (eg Trine) As much information and as many screenshots and links as possible Few old games unless they're doing a major update that changes the game very significantly. One game per answer, add as much information as possible and work with each other to build a catalogue of awesome things to look forward to this year.

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  • Thunderbird uses the wrong browser

    - by Aaron Digulla
    I'm unable to make Thunderbird open the default browser. In the browser preferences, Chromium is selected as the default browser. It's also selected in "Default Applications" in System Settings. In Thunderbird, I read "Chrome (Default)" which is wrong on all levels: Chrome itself complains that it's not the default browser when I click a link inside Thunderbird. In all other places, that I could find, Chromium is the default Here is what I tried: I used update-alternatives --config x-www-browser to select chromium-browser as well (see How do I change the default browser?). And even when I select a different browser from the list in the Thunderbird preferences, it still opens Chrome. My current solution is to create a link from /usr/bin/google-chrome to chromium-browser. How can I force Thunderbird to use the browser I want??? EDIT I also updated gnome-www-browser (update-alternatives --config gnome-www-browser) after feedback from roadmr but that didn't help. At least sensible-browser opens Chromium, now, but Thunderbird is stubborn.

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  • Next generation Three MiFi unit - call for questions to put to Three

    - by Liam Westley
    I've been invited to a preview of the next generation Three mobile Mi-Fi unit in their London offices this week. If you've got feedback on the current MiFi unit; niggles, wish list items or general feedback, or you've got any questions about what the next generation MiFi unit might be, drop me an e-mail or post a comment with your question on this blog. I'll be taking any questions from my blog or my twitter account @westleyl to Three, and if I get an answer I can publish, I'll add to this blog post with the details. Thanks Liam

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  • Will Google penalize subdomains if content is nearly identical

    - by John Pham
    I have created a subdomain for a town in San Diego that's ranking very well for it's keywords: http://carmelvalleymortgage.loanrebateinc.com/ I want to replicate this subdomain's content for another town in San Diego: http://sandiego.mortgage.loanrebateinc.com/ I will edit the text, tags, image files specific to each town, otherwise the verbiage will be identical. Question: Will Google penalize the main site? Will Google penalize the subdomains and list the content as spam? If yes to either 1 or 2, what strategies can I implement to prevent this? I'm using WordPress.

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  • Access Control Service: Passive/Active Transition Sample

    - by Your DisplayName here!
    Here you can find my updated ACS2 sample. In addition to the existing front ends (web [WS-Federation], console [SOAP & REST], Silverlight [REST]) and error handling, it now also includes a WPF client that shows the passive/active transition with a SOAP service as illustrated here. All the ACS interaction is encapsulated in a WPF user control that: retrieves the JSON feed displays a list of supported identity providers triggers the sign in via a browser control retrieves the token response packages the token as a GenericXmlSecurityToken (to be used directly with the WIF ChannelFactory extensions methods) All you need to supply is the ACS namespace and the realm. Have fun!

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  • Big Data – Various Learning Resources – How to Start with Big Data? – Day 20 of 21

    - by Pinal Dave
    In yesterday’s blog post we learned how to become a Data Scientist for Big Data. In this article we will go over various learning resources related to Big Data. In this series we have covered many of the most essential details about Big Data. At the beginning of this series, I have encouraged readers to send me questions. One of the most popular questions is - “I want to learn more about Big Data. Where can I learn it?” This is indeed a great question as there are plenty of resources out to learn about Big Data and it is indeed difficult to select on one resource to learn Big Data. Hence I decided to write here a few of the very important resources which are related to Big Data. Learn from Pluralsight Pluralsight is a global leader in high-quality online training for hardcore developers.  It has fantastic Big Data Courses and I started to learn about Big Data with the help of Pluralsight. Here are few of the courses which are directly related to Big Data. Big Data: The Big Picture Big Data Analytics with Tableau NoSQL: The Big Picture Understanding NoSQL Data Analysis Fundamentals with Tableau I encourage all of you start with this video course as they are fantastic fundamentals to learn Big Data. Learn from Apache Resources at Apache are single point the most authentic learning resources. If you want to learn fundamentals and go deep about every aspect of the Big Data, I believe you must understand various concepts in Apache’s library. I am pretty impressed with the documentation and I am personally referencing it every single day when I work with Big Data. I strongly encourage all of you to bookmark following all the links for authentic big data learning. Haddop - The Apache Hadoop® project develops open-source software for reliable, scalable, distributed computing. Ambari: A web-based tool for provisioning, managing, and monitoring Apache Hadoop clusters which include support for Hadoop HDFS, Hadoop MapReduce, Hive, HCatalog, HBase, ZooKeeper, Oozie, Pig and Sqoop. Ambari also provides a dashboard for viewing cluster health such as heat maps and ability to view MapReduce, Pig and Hive applications visually along with features to diagnose their performance characteristics in a user-friendly manner. Avro: A data serialization system. Cassandra: A scalable multi-master database with no single points of failure. Chukwa: A data collection system for managing large distributed systems. HBase: A scalable, distributed database that supports structured data storage for large tables. Hive: A data warehouse infrastructure that provides data summarization and ad hoc querying. Mahout: A Scalable machine learning and data mining library. Pig: A high-level data-flow language and execution framework for parallel computation. ZooKeeper: A high-performance coordination service for distributed applications. Learn from Vendors One of the biggest issues with about learning Big Data is setting up the environment. Every Big Data vendor has different environment request and there are lots of things require to set up Big Data framework. Many of the users do not start with Big Data as they are afraid about the resources required to set up framework as well as a time commitment. Here Hortonworks have created fantastic learning environment. They have created Sandbox with everything one person needs to learn Big Data and also have provided excellent tutoring along with it. Sandbox comes with a dozen hands-on tutorial that will guide you through the basics of Hadoop as well it contains the Hortonworks Data Platform. I think Hortonworks did a fantastic job building this Sandbox and Tutorial. Though there are plenty of different Big Data Vendors I have decided to list only Hortonworks due to their unique setup. Please leave a comment if there are any other such platform to learn Big Data. I will include them over here as well. Learn from Books There are indeed few good books out there which one can refer to learn Big Data. Here are few good books which I have read. I will update the list as I will learn more. Ethics of Big Data Balancing Risk and Innovation Big Data for Dummies Head First Data Analysis: A Learner’s Guide to Big Numbers, Statistics, and Good Decisions If you search on Amazon there are millions of the books but I think above three books are a great set of books and it will give you great ideas about Big Data. Once you go through above books, you will have a clear idea about what is the next step you should follow in this series. You will be capable enough to make the right decision for yourself. Tomorrow In tomorrow’s blog post we will wrap up this series of Big Data. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: Big Data, PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL

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  • The Best of CES (Consumer Electronics Show) in 2011

    - by Justin Garrison
    This year, How-To Geek’s own Justin was on-site at the Consumer Electronics Show in Las Vegas, where every gadget manufacturer shows off their latest creations, and he was able to sit down and get hands-on with most of them. Here’s the best of the bunch. Make sure to also check out our list of the Worst of CES 2011, where we covered the gadgets that just didn’t make the cut Latest Features How-To Geek ETC HTG Projects: How to Create Your Own Custom Papercraft Toy How to Combine Rescue Disks to Create the Ultimate Windows Repair Disk What is Camera Raw, and Why Would a Professional Prefer it to JPG? The How-To Geek Guide to Audio Editing: The Basics How To Boot 10 Different Live CDs From 1 USB Flash Drive The 20 Best How-To Geek Linux Articles of 2010 Arctic Theme for Windows 7 Gives Your Desktop an Icy Touch Install LibreOffice via PPA and Receive Auto-Updates in Ubuntu Creative Portraits Peek Inside the Guts of Modern Electronics Scenic Winter Lane Wallpaper to Create a Relaxing Mood Access Your Web Apps Directly Using the Context Menu in Chrome The Deep – Awesome Use of Metal Objects as Deep Sea Creatures [Video]

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  • Shared hosting with dedicated IP

    - by JP19
    Hi, Can you please mention here if you know any shared hosting providers who give option to get a dedicated IP? So far I know of one - Netfirms. Please list others if you know. Notes: 1) If mods feel enough people might be interested in this, we can make it community wiki. 2) The reason why someone would want shared hosting with dedicated IP is: i) In most shared hosting plans, you end up getting better CPU/burst RAM than a VPS provided you don't abuse. ii) Dedicated IP is good for SEO. For example, many times, you may get up getting an IP where some p*** sites are also hosted in shared hosting.

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  • Using IP Restrictions with URL Rewrite-Week 25

    - by OWScott
    URL Rewrite offers tremendous flexibility for customizing rules to your environment. One area of functionality that is often desired for URL Rewrite is to allow a large list of approved or denied IP addresses and subnet ranges. IIS’s original IP Restrictions is helpful for fully blocking an IP address, but it doesn’t offer the flexibility that URL Rewrite does. An example where URL Rewrite is helpful is where you want to allow only authorized IPs to access staging.yoursite.com, but where staging.yoursite.com is part of the same site as www.yoursite.com. This requires conditional logic for the user’s IP. This lesson covers this unique situation while also introducing Rewrite Maps, server variables, and pairing rules to add more flexibility. This is week 25 of a 52 week series for the Web Pro. Past and future videos can be found here: http://dotnetslackers.com/projects/LearnIIS7/ You can find this week’s video here.

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  • Is there any way to disable write-access to source code from within Xcode?

    - by Kapil Kapre
    Is there any easy solution to prevent Xcode from writing to source files in a project? I want to edit source files externally and only use Xcode for debugging and so I want to prevent any accidental modifications getting saved via xcode. (Obviously I want Xcode to pickup external changes to files when I build/debug) One possible solution that I thought of was to enable app sandbox entitlements on xcode and manually maintain a list of directories that it should not write to. Is this feasible? Any other ideas? On the sandboxing thing, I'm not sure if Xcode is disqualified as per Apple's Sandboxing Requirements.

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  • Downloading specific video renditions in WebCenter Content

    - by Kyle Hatlestad
    I recently had a question come up on one of my previous blog articles about downloading a specific video rendition.  When accessing image renditions, you simply need to pass in the 'Rendition=<rendition name>' parameter on the GET_FILE service and it will be returned.  But when you try that with videos, you get the error message, "Unable to download '<Content ID>'. The rendition or attachment '<Rendition Name>' could not be found in the list manifest of the revision with internal revision ID '<dID>'. [Read More] 

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  • My Message to the Software Craftsmanship Group

    - by Liam McLennan
    This is a message I posted to the software craftsmanship group, looking for a week-long, pairing / skill sharing opportunity in the USA. I am a journeyman software craftsman, currenlty living and working in Brisbane Australia. In April I am going to travel to the US to attend Alt.Net Seattle and Seattle codecamp. In between the two conferences I have five days in which I would like to undertake a craftsmanship mini-apprenticeship, pairing and skill sharing with your company. I do not require any compensation other than the opportunity to assist you and learn from you. Although my conferences are in Seattle I am happy to travel anywhere in the USA and Canada (excluding Hawaii :) ). Things I am good at: .NET web development, javascript, creating software that solves problems Things I am learning: Ruby, Rails, javascript If you are interested in having me as visiting craftsman from the 12th to the 16th of April please reply on this mailing list or contact me directly. Liam McLennan Now I wait…

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  • Why Alexa has two rankings for my website?

    - by MIH1406
    For the following website: Noaoomah Q&A I have two different Alexa rankings as follows: 1) The public ranking on Alexa siteinfo page of the website, that is the usual ranking page and it indicates a rank of 318,254 which they claim it is updated daily: http://www.alexa.com/siteinfo/noaoomah.com 2) Another public and daily ranking of the same website but it is viewable using either the freely avaliable list for Top 1,000,000 Sites in this page at the almost top right or using StatsCrop website and this ranking indicates a rank of 253,753. Which one is more accurate? Why different daily rankings?

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  • USA keyboard layout keeps getting added on login

    - by Scott Severance
    I use the USA International keyboard layout. Every time I log in, the USA layout gets added to my list of layouts, which causes the keyboard layout indicator to be displayed. How can I stop the USA layout from being added? Additional info: I'm running Natty. Until recently, I had all four layout slots filled. Recently I changed from SCIM to iBus. With this change, I no longer need multiple layouts since iBus better handles my needs. So, I don't want both indicators (iBus and Keyboard layout) showing up.

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  • Rails noob - How to work on data stored in models

    - by Raghav Kanwal
    I'm a beginner to Ruby and Rails, and I have made a couple applications like a Microposts clone and a Todo-List for starters, but I'm starting work on another project. I've got 2 models - user and tracker, you log in via the username which is authenticated and you can log down data which is stored in the tracker table. The tracker has a column named "Calories" and I would like Rails to sum all of the values entered if they are on the same date, and output the result which is subtracted from, say 3000 in a new statement after the display of the model. I know what I'm talking about is just ruby code, im just not sure how to incorporate it. :( Could someone please guide me through this? And also link me to some guides/tutorials which teach working on data from models? Thank you :)

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  • What can Haskell's type system do that Java's can't and vice versa?

    - by Matt Fenwick
    I was talking to a friend about the differences between the type systems of Haskell and Java. He asked me what Haskell's could do that Java's couldn't, and I realized that I didn't know. After thinking for a while, I came up with a very short list of minor differences. Not being heavy into type theory, I'm left wondering whether they're formally equivalent. To try and keep this from becoming a subjective question, I'm asking: what are the major, non-syntactical differences between their type systems? I realize some things are easier/harder in one than in the other, and I'm not interested in talking about those. And to make it more specific, let's ignore Haskell type extensions since there's so many out there that do all kinds of crazy/cool stuff.

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  • Is there a “P” programming language? [closed]

    - by Synetech
    I’m wondering if anybody has made a programming language based on BCPL, named P. There was a language named B that was based on BCPL, followed of course by C, also based on BCPL. I’ve seen plenty of whimsically named programming languages, so I can’t help but be surprised if nobody made one called P. I checked the Wikipedia’s—not exactly comprehensive—list of programming languages, and while there are three languages named L (none of which are related to BCPL), there are none called P—in fact, it is one of the only letters not used as a name. (Google is useless for one-letter query terms.) Does anybody know if a P has been made, even as a lark. (Yes, I know about P#, but that is based on Prolog, not BCPL; there is one called P, but it is also not related to BCPL.)

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  • Mobile game production workflow using Html5 and visual studio

    - by Mihalis Bagos
    I want to know of any framework, that lets you build/test applications inside Visual Studio using Html5/JS. We need to be able to have an emulator (like the one on android sdk) for as many devices as possible, and we need to be able to run the application with as few steps as possible (using the "RUN" command in visual studio is no1 choice). Also, this extends to build and deployment to app stores. Is there a way to circumvent the cloud services and build locally? I am at a loss of the plethora of tools and technologies available for game design using Html5. However, I really don't like the way implementations try to get you to rely on their cloud services, so services like appmobi are at the bottom of the favored list.

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  • How is technical debt best measured? What metric(s) are most useful?

    - by throp
    If I wanted to help a customer understand the degree of technical debt in his application, what would be the best metric to use? I've stumbled across Erik Doernenburg's code toxicity, and also Sonar's technical debt plugin, but was wondering what others exist. Ideally, I'd like to say "system A has a score of 100 whereas system B has a score of 50, so system A will most likely be more difficult to maintain than system B". Obviously, I understand that boiling down a complex concepts like "technical debt" or "maintainability" into a single number might be misleading or inaccurate (in some cases), however I need a simple way to convey the to a customer (who is not hands-on in the code) roughly how much technical debt is built into their system (relative to other systems), for the goal of building a case for refactoring/unit tests/etc. Again, I'm looking for one single number/graph/visualization, and not a comprehensive list of violations (e.g. CheckStyle, PMD, etc.).

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  • What should a freelancer's business card have?

    - by Sergio
    For example, when I first started out freelancing a year ago, my business card had my name, email and website - and up top a list of the technologies I'm comfortable with. In retrospect I don't feel this was a wise decision. Why would a potential client know what Python or Ruby is? How could he know what .NET was? I still have a couple of the old batch left, but I'm going to send out for some new cards. What do you recommend we developers have to show on our business cards? Am I correct in thinking listing technologies is meaningless to potential clients?

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  • Byobu looks broken in Putty from Windows

    - by TheLQ
    After trying screen for 2 days I already hate it and am now trying byobu. However currently it looks very broken in Putty. I've already fixed the key mapping issue, but this issue isn't specified in the man page or even google: Notice the misplaced position of the list of windows, the broken selector position, the duplication of the last window, the random a in the top right, and the misplaced apply option. You can't see this, but the last option is not selectable. Is there some option in Putty I need to use in order to see this correctly?

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