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  • How can a not null constraint be dropped?

    - by Tomislav Nakic-Alfirevic
    Let's say there's a table created as follows: create table testTable ( colA int not null ) How would you drop the not null constraint? I'm looking for something along the lines of ALTER TABLE testTable ALTER COLUMN colA DROP NOT NULL; which is what it would look like if I used PostgreSQL. To my amazement, as far as I've been able to find, the MySQL docs, Google and yes, even Stackoverflow (in spite of dozens or hundreds of NULL-related questions) don't seem to lead towards a single simple SQL statement which will do the job.

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  • Recommendation for screen video capture for demos

    - by Simon
    I am just in the process of making some little demo tutorial videos for my app to help users get up to speed. I have used Camtasia in the past but don't really like it. Anyone have any recommendations. Good is more important than free, but free certainly helps. I can use Windows or Mac for this job.

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  • LINQ to SQL vs Entity Framework for an app with a future SQL Azure version

    - by Craig L
    I've got a vertical market Dot Net Framework 1.1 C#/WinForms/SQL Server 2000 application. Currently it uses ADO.Net and Microsoft's SQLHelper for CRUD operations. I've successfully converted it to Dot Net Framework 4 C#/WinForms/ SQL Server 2008. What I'd like to do is also offer my customers the ability to use SQL Azure as a backend storage for their data instead of local/LAN SQL Server. If I know SQL Azure is in my application's future, should I: A. Switch to LINQ to SQL B. Swith to Entity Framework C. Stick with ADO.Net and SQLHelper Thanks !

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  • YAML to CSV converter-does one exist already?

    - by Joel
    Hi folks, I'm wanting to migrate contacts from one CRM to another. The first only exports all the data I need in YAML. The second only imports with CSV. Is there a converter out there that already exists, or do I need to build one specific to this job? Thanks!

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  • Best practice stock management when payment of customer failed using SQL Server and ASP.NET

    - by Martijn B
    Hi there, I am currently building a webshop for my own where I want to increment the product-stock when the user fails to complete payment within 10 minutes after the customer placed the order. I want to gather information from this thread to make a design decision. I am using SQL Server 2008 and ASP.NET 3.5. Should I use a SQL Server Job who intervals check the orders which are not payed yet or are there better solutions to do this. Thanks in advance! Martijn

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  • Launching unknown activities from an android application.

    - by oscarello
    Hi, I want to make an android application that shows a listing of applications (downloaded from the android market) and launches the one that the user selects. From what I've read, I'd have to use intents like this: Intent intent = new Intent(); intent.setClassName(packageName, className); startActivity(intent); I just want to be able to launch the applications, not a specific activity that they could have. My question is: how could I launch these applications if I don't know their packageName or className? or maybe, how could I get to know their className and packageName, if it's a closed source application that I didn't develop. Thanks.

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  • using IE credentials to log on with c#

    - by james
    Hi i am writing a HTML parser for helping with some job duties, I can enter the site using IE explorer. but using csharp code i get an error i have tried using client.Credentials = CredentialCache.DefaultNetworkCredentials; client.Proxy.Credentials = CredentialCache.DefaultCredentials; i don't get the requested page, but an error page. if i can view page in explorer there must be a way to retrieve its html in C# (note that same page in other browsers requires authintication - not in IE) appreciate the help

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  • Validate Linq2Sql before SubmitChanges()

    - by Nick Gotch
    Can anyone tell me if/how you can validate the changes in a data context in Linq2Sql before calling SubmitChanges(). The situation I have is that I create a context, perform multiple operations and add many inserts alongside other processing tasks and then rollback if the submit fails. What I'd prefer to do is make some kind of "Validate()" call after certain tasks are done so that I can handle it before submitting the entire job.

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  • Good beginners' level book about mobile telecommunication

    - by vito
    I've recently joined a company who specialize in the mobile telecommunication domain. I'm encountering a lot of jargons, and I'm feeling a bit lost in most of the conversations. Although I'm quickly searching for the new terms on the web and learning stuff on the job, I would like to read an introductory book that will take me through the basics of the mobile world. Thanks for your recommendations!

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  • GNU make: should -j equal number the number of CPU cores in a system?

    - by Johan
    Hi What is you experience with the make -j flag? There seem to be some controversial if the jobs are supposed to be equal to the numbers of cores, or if you can maximize the build by adding one extra job that can be cued up while the others "work". The question is if it is better to use -j4 or -j5? And have you seen (or done) any benchmarking that support one or the other? Thanks Johan

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  • How to open DataSet in Visual Studio 2008 faster?

    - by Ekkapop
    When I open DataSet in Visual Studio 2008 to design or modify it, it always take a very long time (more than five minutes) before I can continue to do my job. While I'm waiting I can't do anything on Visual Studio, moreover CPU and memory usage is growth dramatically. I want to know, Is it has anyway to reduce this waiting time? Hardware - Desktop CPU: Intel Q6600 Memory: 4 GB HDD: 320 GB 7200 rpm OS: Windows XP 32 bit with Service Pack 3

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  • Temporary operation in a temporary directory in shell script

    - by jhs
    I need a fresh temporary directory to do some work in a shell script. When the work is done (or if I kill the job midway), I want the script to change back to the old working directory and wipe out the temporary one. In Ruby, it might look like this: require 'tmpdir' Dir.mktmpdir 'my_build' do |temp_dir| puts "Temporary workspace is #{temp_dir}" do_some_stuff(temp_dir) end puts "Temporary directory already deleted" What would be the best bang for the buck to do that in a Bash script? I want to trap

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  • MBA and a Computer Science degree

    - by Chung Pow
    A similar question was asked a while back, but I want to know some people who both have an MBA and a Computer Science degree and advanced their careers. What kind of job did you have before and after achieving an MBA? I'm a programmer and I have thought about getting an MBA. What doors will that open for me?

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  • Good Domain Driven Design samples

    - by jlembke
    I'm learning about DDD and enjoying every minute of it. However, there are some practical issues that are confusing to me that I think seeing some good samples might clear up. So being at peace with those issues, does anyone know of some good working code samples that do a good job of modeling basic DDD concepts? Particularly interested in An illustrative Domain Model Repositories Use of Domain/Application Services Value Objects Aggregate Roots I know I'm probably asking for too much, but anything close will help.

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  • Using perl to parse a file and insert specific values into a database

    - by Sean
    Disclaimer: I'm a newbie at scripting in perl, this is partially a learning exercise (but still a project for work). Also, I have a much stronger grasp on shell scripting, so my examples will likely be formatted in that mindset (but I would like to create them in perl). Sorry in advance for my verbosity, I want to make sure I am at least marginally clear in getting my point across I have a text file (a reference guide) that is a Word document converted to text then swapped from Windows to UNIX format in Notepad++. The file is uniform in that each section of the file had the same fields/formatting/tables. What I have planned to do, in a basic way is grab each section, keyed by unique batch job names and place all of the values into a database (or maybe just an excel file) so all the fields can be searched/edited for each job much easier than in the word file and possibly create a web interface later on. So what I want to do is grab each section by doing something like: sed -n '/job_name_1_regex/,/job_name_2_regex/' file.txt --how would this be formatted within a perl script? (grab the section in total, then break it down further from there) To read the file in the script I have open FORMAT_FILE, 'test_format.txt'; and then use foreach $line (<FORMAT_FILE>) to parse the file line by line. --is there a better way? My next problem is that since I converted from a word doc with tables, which looks like: Table Heading 1 Table Heading 2 Heading 1/Value 1 Heading 2/Value 1 Heading 1/Value 2 Heading 2/Value 2 but the text file it looks like: Table Heading 1 Table Heading 2Heading 1/Value 1Heading 1/Value 2Heading 2/Value 1Heading 2/Value 2 So I want to have "Heading 1" and "Heading 2" as a columns name and then put the respective values there. I just am not sure how to get the values in relation to the heading from the text file. The values of Heading 1 will always be the line number of Heading 1 plus 2 (Heading 1, Heading 2, Values for heading 1). I know this can be done in awk/sed pretty easily, just not sure how to address it inside a perl script. After I have all the right values and such, linking it up to a database may be an issue as well, I haven't started looking at the way perl interacts with DBs yet. Sorry if this is a bit scatterbrained...it's still not fully formed in my head.

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  • open source alternatives to popular websites

    - by Richard
    Hello, The other day I came across Jaiku, which is a well structured microblogging system open sourced by Google. It surprised me I had never heard about this, so I was wondering what other open source alternatives exist for mainstream websites? I am not asking about forums, eCommerce, wiki's, CMS's, etc, where the market leaders are already well known open source applications (phpBB, osCommerce, Mediawiki, Drupal). But what about open source alternatives for: Social networking (Facebook)? Classified advertising (Craigslist)? Jobs (CareerBuilder)? Dating (eHarmony)? Or any other field that is defined by a commercial website, as Twitter does for microblogging.

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  • Localization — how to check that Filename1 and Filename2 are the same

    - by modosansreves
    I want to know that Filename1, provided by the user is the same as stored in DB (Filename2). I was about to use string.Equals(Filename1, Filename2, StringComparison.CurrentCultureIgnoreCase) but then I doubted whether I should use StringComparison.InvariantCultureIgnoreCase. Obviously, I need to do this the same way OS does, or use appropriate API. In some cultures, AFAIK, characters (e.g. vocals) may change if the next one is Capitalized. As I primarily target English-speaking market, I'd like my software to work well throughout the world.

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  • Bash edit file and keep last 500 lines

    - by Lizard
    I am looking to create a cron job that opens a directory loops through all the logs i have created and deletes all lines but keep the last 500 for example. I was thinking of something along the lines of tail -n 500 filename > filename Would this work? I also not sure how to loop through a directory in bash Thanks in advance.

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  • Any experience with CryptoObfuscator or CryptoLicensing?

    - by anon2009
    Hi, I'm on the market for a good (and cheap) .Net obfuscator. I'm developing a .Net windows forms application. I evaluated IntelliLock and SmartAssebly so far. I quit the first on lack of support (I sent two emails with no response, no support site, etc). SmartAssebly looks pretty good but is too rich for my blood. Has anyone used CryptoObfuscator? Any good or bad experiences? Once, I have you here, what about CryptoLicensing? Thanks

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  • redirect user, then log his visit using php and mysql

    - by Bart van Heukelom
    I have a PHP redirect page to track clicks on links. Basically it does: - get url from $_GET - connect to database - create row for url, or update with 1 hit if it exists - redirect browser to url using Location: header I was wondering if it's possible to send the redirect to the client first, so it can get on with it's job, and then log the click. Would simply switching things around work?

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