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• USC gives "failed to download package files" message - how to fix?

  - by DrT

  Trying to download a program (Advanced Settings aka Gnome Tweak tool) from USC and getting this error "Failed to Download Package Files: check your internet connection". Under details is info: Failed to fetch http://ch.archive.ubuntu.com/ubuntu/pool/main/n/network-manager/gir1.2-networkmanager-1.0_0.9.1.90-0ubuntu4_i386.deb 404 Not Found Question: how to fix? Note: I tried downloading another program from USC (GnuCash) and it worked fine. And my internet connect is working fine (able to surf the web, etc) and Ubuntu is fully up to date and is able to download updates. It seems to be a problem just getting the "Advanced Settings" program. (Ubuntu 11.10).

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• Need your opinion: which domain should I use for the blog?

  Reader new to my blog might have wondered why blog lives in a .NZ domain: to make a long story short is because when I started my blog I was soo excited about my relocation to New Zealand that I registered a .NZ domain. Then I came back to Italy, and started to work in Milano. Last autumn I had to chance to go back to New Zealand again, but at the same time the offer to work for an European Institution arrived. And then my .net.nz domain didn't make sense any more. And because it seems like I've...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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• Advise on effectively re-entering CPP world [closed]

  - by Aadith

  I am getting back into C++ world after nearly a decade. Apparently, there has been a world of development. Would like to get the developer community's advice as to what would be a good approach to have a smooth take-off. To start with, I have done the following: Read up (very briefly) on C++ 11 standards Installed GCC 4.7 Wrote a Hello World program I am sure getting a decent book and reading through it would do. But I am looking for any strategic advise experts might have to share. Trying to leverage on past experience to have a short but effective initial learning span. What would be top few things I would have to look into?

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• Windows Communication Foundation (WCF): The Little Things

  This article talks about some of the smaller details of Windows Communication Foundation that will help .NET developers get started using WCF.

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• Where can I get a definition of how the code is laid out in VB.NET 2010?

  - by ByteWorker

  I am just starting out learning Visual Basic 2010. I have books and videos. The books all seem to be written for people who have some programming experience, even the books that say they are for beginners. The videos were great until they started talking about variables. I got the basics of them but they started into complicated variables and I don’t see the need for them right away. Where can I go to see code for fairly intricate applications written out, with an over lay of definitions of which part of the code is a method as opposed to a class and so on? Also, I am working at a company that does not use SQL. So I need to use Access 2007 for all of my tables. Is there much of a difference to the coding?

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• Why I can't open folders copied from Ubuntu on Windows?

  - by user37805

  Is not possible for me to open whatever folder I copy from Ubuntu to my Windows partition or whatever usb memory. Windows says the folder's location is either disconnected or doesn't exist. Can't copy, cut or delete the folder on Windows but with Ubuntu I can. This happens even if I create the folder on the ntfs disc. I have never had this problem before. Files are openable however, but not if they are inside a folder. This started after I haven't made any other changes except for the update to kernel 3.2.0-30-generic, I am using 12.04, never installed Samba, after this problem started I tried to fix it by installing ntfs-3f, ntfsprogs, ntfs-config, but It didn't work.

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• How can I stay focused and motivated on a project?

  - by RTS

  I'm working on starting my own software development business, but I've noticed that I have major issues getting projects out by their deadlines, and in general getting them out of the "almost-done" stage. I feel my problem is that I like complex programming too much, and I end up rewriting code to make it cleaner/more efficient/less error prone as a means of putting off more "boring" development. I end up with polished applications at the end, but I spend twice as long on the project as I should have. If I ever want my company to succeed, I need to work on staying focused on what actually needs to be done, so the question is: What techniques do you use to keep yourself focused and motivated on a project, in your career?

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• Even distribution through a chain of resources

  - by ClosetGeek

  I'm working on an algorithm which routes tasks through a chain of distributed resources based on a hash (or random number). For example, say you have 10 gateways into a service which distribute tasks to 1000 handlers through 100 queues. 10,000 connected clients are expected to be connected to gateways at any given time (numbers are very general to keep it simple). Thats 10,000 clients 10 gateways (producers) 100 queues 1000 workers/handlers (consumers) The flow of each task is client-gateway-queue-worker Each client will have it's own hash/number which is used to route each task from the client to the same worker each time, with each task going through the same gateway and queue each time. Yet the algorithm handles distribution evenly, meaning each gateway, queue, and worker will have an even workload. My question is what exactly would this be called? Does such a thing already exist? This started off as a DHT, but I realized that DHTs can't do exactly what I need, so I started from scratch.

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• A Look Into Web Services

  When I first started working on the web and developing websites, the Web Service was a new concept t ...

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• A Look Into Web Services

  When I first started working on the web and developing websites, the Web Service was a new concept t ...

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• 301 redirect from a country specific domain

  - by Raj

  I originally started using a .do domain extension for my site, but later realized that this country specific domain would prevent us from appearing in search results for places outside of the Dominican Republic. We started using a .co domain extension and redirected all requests to the new domain using an HTTP 301. The "Crawl Stats" in Google Webmaster Tools shows me that the .co domain is being crawled, but the "Index Status" shows the number of pages indexed at 0. The "Crawl Stats" for the .do domain says that it's being crawled and the "Index Status" shows a number greater than 0. I also set a "Change Of Address" in Google Webmaster Tools to have the .do domain point to the new .co domain. We're still not appearing in search results at all even for very specific strings where I would expect to find us. Am I doing something wrong?

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• Installing Ubuntu 11.10 on HP Envy 15 - Partition Problems

  - by imparator

  I am trying to install Ubuntu 11.10 on my HP ENVY 15, however I am getting some problems. When I come to the partitioning section of the installation I am given my 4 partitions that I have. I change the partition of my 450 gb to 420 gb, so that I can use that 30gb space that I free up to install Ubuntu on it. After I do this step, instead of seeing the keyword to the 30gb I see unusable. I have read that there can not be more than 4 partitions somewhere for a UBUNTU installation, but that is not true, because I just installed Ubuntu 11.10 on my Lenovo which has the same amount of partitions as my ENVY ( I do get problems on my lenovo with installing ATI drivers but that is a completely different story). Does anybody have an idea of why I am getting an unusable notification next to my freed up space?

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• C++ linkage error . What am I doing wrong ? [migrated]

  - by nashmaniac

  So, this is the first time I actually separated a single program into a header and two .cpp files . But I think I am getting an linkage error . Heres how the directory looks . (heres a link to my image I dont have enough rep to post image in the question) http://i.stack.imgur.com/sbT4V.png The main.cpp is my main source file where all the calling functions and other important stuff goes . In functions.cpp I have all my functions , in the coordin.h file I have the function prototypes and structures and Constants . Everything is ok no typo nothing I have checked everything . But I am getting an undefined reference to function error. I have included the coordin.h file too . Do you think the functions.cpp file needs to go somewhere else I mean is the compiler not looking inside that file ? Thanks !

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• Backup SQL server with relative file path and progress

  This class will allow you to asynchronously backup a database while also getting progress, message, and error notifications.

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• SEO Tips - Updating Your Content and Avoiding Duplicate Filters

  If you are just getting into Search Engine Optimization, it's important that you are aware that content is the most important thing in your website in order to get high ratings. If you decide to hire an SEO Consultant, make sure that you explain to them exactly what you want your website to look like and the content that you would like it to feature. Having fresh and relevant content in your website is the key as that will bring web crawlers back frequently. There are different ways of achieving this while avoiding getting your website removed off of a search engine due to duplicate content.

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• Redesigning an Information System - Part 1

  - by dbradley

  Through the next few weeks or months I'd like to run a small series of articles sharing my experiences from the largest of the project I've worked on and explore some of the real-world problems I've come across and how we went about solving them. I'm afraid I can't give too many specifics on the project right now as it's not yet complete so you'll have to forgive me for being a little abstract in places! To start with I'm going to run through a little of the background of the problem and the motivations to re-design from scratch. Then I'll work through the approaches taken to understanding the requirements, designing, implementing, testing and migrating to the new system. Motivations for Re-designing a Large Information System The system is one that's been in place for a number of years and was originally designed to do a significantly different one to what it's now being used for. This is mainly due to the product maturing as well as client requirements changing. As with most information systems this one can be defined in four main areas of functionality: Input – adding information to the system Storage – persisting information in an efficient, searchable structure Output – delivering the information to the client Control – management of the process There can be a variety of reasons to re-design an existing system; a few of our own turned out to be factors such as: Overall system reliability System response time Failure isolation and recovery Maintainability of code and information General extensibility to solve future problem Separation of business and product concerns New or improved features The factor that started the thought process was the desire to improve the way in which information was entered into the system. However, this alone was not the entire reason for deciding to redesign. Business Drivers Typically all software engineers would always prefer to do a project from scratch themselves. It generally means you don't have to deal with problems created by predecessors and you can create your own absolutely perfect solution. However, the reality of working within a business is that the bottom line comes down to return on investment. For a medium sized business such as mine there must be actual value able to be delivered within a reasonable timeframe for any work to be started. As a result, any long term project will generally take a lot of effort and consideration to be approved by those in charge and therefore it might be better to break down the project into more manageable chunks which allow more frequent deliverables and also value within a shorter timeframe. As the only thing of concern was the methods for inputting information, this is where we started with requirements gathering and design. However knowing that there might be more to the problem and not limiting your design decisions before the requirements is key to finding the best solutions.

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• Clicking on application launcher starts another window. What should I do?

  - by MMA

  If I remember correctly, clicking on the application in launcher started the application if it was not already open and focused on the application if it was already open. Previously, I had to middle click to start another instance. But, recently, whenever I click in the launcher, a new application window is started, irrespective of whether one is already open or not. What should I do? A bug? Or a new feature? I am using 12.04 LTS and 12.10 in two machines. Both fully updated. Both are showing the same behaviour.

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• Ubuntu is not showing in LightDM menu list

  - by dearvivekkumar

  I am using using ubuntu 11.10. Everything was working perfectly this morning. At a moment "Ubuntu software center" application was unable to get started. So I restarted by system and when I logged in it started under GNOME. Again when I try to start in ubuntu session then it was not showing in menu list but Ubuntu 2D is coming. I don't come to know why this is happening. please let me know any fix for this issue. Thanks!

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• Software install failure

  - by ilandroffshore

  I am getting a "Package Operations Failed" message at the 95% mark of each download. Details show "Reading database" for each 5 percentage segment until Reading database ... 95%dpkg: unrecoverable fatal error aborting: failed in buffer_read(fd): files list for package `gstreamer0.10-plugins-ugly' I have tried to download a number of piece of software (most recently PDF Editor) and am getting the same message at the same point in the download. Is there something wrong with my Ubuntu version, a virus or is it the software being downloaded? Using 10.04 LTS. P.S. Same problem when trying to download updates.

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• Implement an FTP server (no threads) - how to start?

  - by ironicaldiction

  As a semester project, I have the following specification: Write a simple single threaded ftp server. The ftp server is configurable from a configuration file. The config allows to set the interface (where the server listens), the roots of the served content, transfer log, and database of users and its passwords. The server allows to create a virtual filesystem. By a virtual filesystem, we mean a mapping of a served directory to the real directory on the filesystem. For example, the client tree will look like: /home/user1 maps to /mnt/x/home/user1 /www maps to /var/cache/www /home/user_list.txt maps to /var/ftpclient/user_list.txt The user will see /home/user1 directory and /www directory and the file /home/user_list.txt The course is in C++. The projects to this point have provided a lot of structure, such as a class header file to get you started on the program. My question is this: how can I get started on what seems like quite a massive project (I have 3 weeks to return a working implementation)?

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• What personal milestones can you use to measure growth in your programming abilities?

  - by GWLlosa

  How can you determine objectively, over time, that you are getting any better at producing code? For example, I may sit here and feel that "I know <language> now, and I use <technique> now, so I must be better." But this does not account for my own bias, or the fact that I may be getting better at a slower rate than intended, or I may actually suck at <technique> and not realize it. What methods are available for one to objectively rate one's own abilities? What about to objectively compare them to their peer groups?

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• How to fix “A deployment or retraction is already under way for the solution “*.wsp”, and only one deployment or retraction at a time is supported”

  - by ybbest

  I faced this issue when I try to deploy a solution and it failed initially due to SharePoint 2010 Administration service is not started. I then started the service and redeploy the solution; however I face the above issue. To fix it, you need to cancel the current deployment then redeploy the solution. Problem: Solution: To fix it, you need to cancel the current solution deployment. Go to CAà System Settings àManage farm solutions and then cancel the deployment. Next, you can redeployment your solution.

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• iptables firewall to protect against automated entries

  - by Kenyana

  I am getting unusually large calls on my app. I have implemented CSRF Check over ajax and its working but am still getting so many calls. My guess is that someone has a script that is 'logged' in and making all these calls. Could someone please share a good iptables script for blocking ip's that run 10 calls to /controler/action in a second. I am using `/sbin/iptables -A INPUT -p tcp --syn --dport $port -m connlimit --connlimit-above N -j REJECT --reject-with tcp-reset save the changes see iptables-save man page, the following is redhat and friends specific command service iptables save` That is from cyberciti

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• Silverlight Connections - Vegas Nov 1-4

  got asked to speak at SilverlightConnections in Vegas in Nov. :) topics include: 'Breaking Down Walls The Story of Getting designers and developers working together in an Agency Environment' and 'Multi Dos and Dont touches Multi Touch Development from the trenches' and 'Going from Silverlight to Phone 7 Silverlight Application Development'http://www.devconnections.com/shows/FALL2010ASP/default.asp?s=151 Title: Breaking Down Walls The Story of Getting designers and developers working together in...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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• What personal milestones can you use to measure growth in your programming abilities?

  - by GWLlosa

  How can you determine objectively, over time, that you are getting any better at producing code? For example, I may sit here and feel that "I know now, and I use now, so I must be better." But this does not account for my own bias, or the fact that I may be getting better at a slower rate than intended, or I may actually suck at and not realize it. What methods are available for one to objectively rate one's own abilities? What about to objectively compare them to their peer groups?

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