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  • Deny Switching to Tabpage in a tabcontrol

    - by Maneesh
    I have a form(C#) with a tab control and its has around five tab pages. each of the tab have a few textboxes. 1) if a User is in say Tab A and edits certain fields i need to validate the text enetered if found invalid then i should not allow any tab switch ? is that possible? 2) Another case could be ... user edits some values and clicks on another tab, on doing so i need to check if the values that were enetered for Tab A is correct or not ? can i do this? I am a novice to C#... so may be these questions sound very basic any help will be appreciated. also i want to know what are these events of a tab page Leave, validated or validating ?

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  • How come many project-hosting sites doesn't have a forum feature?

    - by george
    I'm considering starting an open-source project, so I shopped around some popular project hosting sites. What I find surprising is that many (see here for a nice feature table) of the popular project hosting sites (e.g. GitHub, BitBucket) don't have a forum feature, i.e. a place where users can talk to the devs, ask questions, raise ideas, etc. IMHO an active forum is an important factor in creating a user community around a project, so I would expect that most project owners would be interested in such a feature. I've also noticed that some projects do have support forums (or mailing lists) hosted elsewhere - e.g. Ruby on Rails is hosted on GitHub but has a Google Groups support group, and TortoiseHG is hosted on BitBucket but has a mailing list on SourceForge - so it's not like this feature is unneeded. So how come many project hosting sites don't have a forum feature?

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  • Virtual Brown Bag Recap: JB's New Gem, Patterns 101, Killing VS, CodeMav

    - by Brian Schroer
    At this week's Virtual Brown Bag meeting: JB showed off his new SpeakerRate Ruby gem Claudio alerted us to the Refactoring Manifesto We answered the question "How do I get started with Design Patterns?" Ever had to kill a frozen instance of Visual Studio? Yeah, I thought so. Claudio showed us how to do it with PowerShell. (It's faster) JB previewed his new CodeMav web site, which will be a social network for developers (integration with Speaker Rate, slide share, github, StackOverflow, etc.) For detailed notes, links, and the video recording, go to the VBB wiki page: https://sites.google.com/site/vbbwiki/main_page/2011-01-06

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  • Advice on learning programming languages and math.

    - by Joris Ooms
    I feel like I'm getting stuck lately when it comes to learning about programming-related things; I thought I'd ask a question here and write it all down in the hope to get some pointers/advice from people. Perhaps writing it down helps me put things in perspective for myself aswell. I study Interactive Multimedia Design. This course is based on two things: graphic design on one hand, and web development on the other hand. I have quite a decent knowledge of web-related languages (the usual HTML/JS/PHP) and I'll be getting a course on ASP.NET next year. In my free time, I have learnt how to work with CodeIgniter, aswell as some diving into Ruby (and Rails) and basic iOS programming. In my first year of college I also did a class on Java (19/20 on the end result). This grade doesn't really mean anything though; I have the basics of OOP down but Java-wise, we learnt next to nothing. Considering the time I have been programming in, for example, PHP.. I can't say I'm bad at it. I'm definitely not good or great at it, but I'm decent. My teachers tell me I have the programming thing down. They just tell me I should keep on learning. So that's what I do, and I try to take in as much as possible; however, sometimes I'm unsure where to start and I have this tendency to always doubt myself. Now, for the 'question'. I want to get into iOS programming. I know iOS programming boils down to programming in Cocoa Touch and Objective-C. I also know Obj-C is a superset of C. I have done a class on C a couple of years ago, but I failed miserably. I got stuck at pointers and never really understood them.. Until like a month ago. I suddenly 'got' it. I have been working through a book on Objective-C for a week or so now, and I understand the basics (I'm at like.. chapter 6 or so). However, I keep running into similar problems as the ones I had when I did the C class: I suck at math. No, really. I come from a Latin-Modern Languages background in high school and I had nearly no math classes back then. I wanted to study Computer Science, but I failed there because of the miserable state of my mathematics knowledge. I can't explain why I'm suddenly talking about math here though, because it isn't directly related to programming.. yet it is. For example, the examples in the book I'm reading now are about programming a fraction-calculator. All good, I can do the programming when I get the formulas down.. but it takes me a full day or more to actually get to that point. I also find it hard to come up with ideas for myself. I made one small iOS app the other day and it's just a button / label kind of thing. When I press the button, it generates a random number. That's really all I could come up with. Can you 'learn' that? It probably comes down to creativity, but evidently, I'm not too great at being creative. Are there any sites or resources out there that provide something like a basic list of things you can program when you're just starting out? Maybe I'm focusing on too many things at once. I want to keep my HTML/CSS at a decent level, while learning PHP and CodeIgniter, while diving into Ruby on Rails and learning Objective-C and the iOS SDK at the same time. I just want to be good at something, I guess. The problem is that I can't seem to be happy with my PHP stuff. I want more, something 'harder'; that's why I decided to pick up the iOS thing. Like I said, I have the basics down of a lot of different languages. I can program something simple in Java, in C, in Objective-C as of this week.. but it ends there. Mostly because I can't come up with ideas for more complex applications, and also because I just doubt myself: 'Oh, that's too complex, I can never do that'. And then it ends there. To conclude my rant, let me basically rephrase my questions into a 'tl;dr' part. A. I want to get into iOS programming and I have basic knowledge of C/Objective-C. However, I struggle to come up with ideas of my own and implement them and I also suck at math which is something that isn't directly related to, yet often needed while programming. What can I do? B. I have an interest in a lot of different programming languages and I can't stop reading/learning. However, I don't feel like I'm good in anything. Should I perhaps focus on just one language for a year or longer, or keep taking it all in at the same time and hope I'll finally get them all down? C. Are there any resources out there that provide basic ideas of things I can program? I'm thinking about 'simple' command-line applications here to help me while studying C/Obj-C away from the whole iPhone SDK. Like I said, the examples in my book are mainly math-based (fraction calculator) and it's kinda hard. :( Thanks a lot for reading my post. I didn't plan it to be this long but oh well. Thanks in advance for any answers.

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  • how to allocate array of channels in go

    - by eran
    Sorry for the novice syntax question. How do how create an array of channels in go? var c0 chan int = make(chan int); var c1 chan int = make(chan int); var c2 chan int = make(chan int); var c3 chan int = make(chan int); var c4 chan int = make(chan int); That is, replacing the above five lines in one array of channels of size 5? Many thanks.

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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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  • box-shadow : is there a "box-shadow-color" ?

    - by Epaga
    Note: CSS novice here. Be gentle. ;-) I have the following CSS: ... -webkit-box-shadow: inset 0px 0px 2px #a00; -moz-box-shadow: inset 0px 0px 2px #a00; ... Now I am trying to extract that color to make the page colors "skinnable". Is there any way of doing this? Simply removing the color, and then using the same key again later overwrites the original rule. There doesn't seem to be a -webkit-box-shadow-color, at least Google turns nothing up.

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  • Tips on upgrading CVS to git/hg?

    - by meder
    We still use CVS, I use git and hg for my personal use though I'm still a novice at both, but I realize they're much more modern and better, faster, distributed, etc. It's just everyone is so accustomed to CVS that I feel a whole slew of issues could arise if I were to be the one that recommended and actually did the upgrading/porting/transitioning of our current CVS server to git or hg. Has anyone actually done this, recently? Could you offer any insight or tips in terms of influencing people to use git/hg, and just generic tips on the actual updating/transitioning if it were to take place? Are there common issues I should be aware of just in general?

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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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  • YouTube API Office Hours May 23, 2012

    YouTube API Office Hours May 23, 2012 This is a recording of the YouTube API Hangout on Air from Wednesday 5/23 at 10am PDT (UTC-7) Jeffrey Posnick spoke about the new CORS support in the YouTube API. JJ Shannon Behrens with Jarek Wilkiewicz covered YouTube sessions schedule at Google I/O (developers.google.com Our special guests were Dror Shimshowitz and Aj Crane from the YouTube Product Management team. Dror and AJ gave a short overview of an exciting session they have coming up at Google I/O. Topics: * YouTube Channels: Get with the Program! * Getting Direct Feedback from your YouTube Community * Mobile YouTube API Apps for Content Creators, Curators and Consumers * HTML5 at YouTube: Stories from the Front Line * YouTube API + Cloud Rendering = Happy Mobile Gamers * New YouTube Android Player Tools (Session + Codelab) * Master the Latest YouTube Data API (Codelab) * Webinar: YouTube for Your Business * Webinar: Using YouTube APIs and Ruby on Rails for Educational Apps From: GoogleDevelopers Views: 649 16 ratings Time: 46:44 More in Science & Technology

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  • What is the meaning of the sentence "we wanted it to be compiled so it’s not burning CPU doing the wrong stuff."

    - by user2434
    I was reading this article. It has the following paragraph. And did Scala turn out to be fast? Well, what’s your definition of fast? About as fast as Java. It doesn’t have to be as fast as C or Assembly. Python is not significantly faster than Ruby. We wanted to do more with fewer machines, taking better advantage of concurrency; we wanted it to be compiled so it’s not burning CPU doing the wrong stuff. I am looking for the meaning of the last sentence. How will interpreted language make the CPU do "wrong" stuff ?

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  • Compiler Dependencies [closed]

    - by asghar ashgari
    I'm a newbie researcher who's passion is programming languages (Web era). I'm wondering why all the Web frameworks and Web-based general purposes languages, have a huge number of dependencies when you want to install and then use (e.g., extend, alternate, etc.) their compilers. For example, Ruby on Rails or Scala. If I want to download their source code, and try to build it again, to me at least, feels like a can of worms. I have a MAC, so I need to install MACports, then update my XCode, then get the compiler source code that has bunch of other dependencies, then its hard to set things up; just to see the installed open-source compiler works fine.

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  • Design patterns and multiple programming language

    - by Eduard Florinescu
    I am referring here to the design patterns found in the GOF book. First how I see it, there are a few peculiarities to design pattern and knowing multiple language knowledge, for example in Java you really need a singleton but in Python you can do without it you write a module, I saw somewhere a wiki trying to write all GOF patterns for JavaScript and the entries where empty, I guess because it might be a daunting task. If there is someone who is using design patterns and is programming in multiple programming languages supporting the OOP paradigm and can give me a hint on how should I approach design patterns that might help me in all languages I use(Java, JavaScript, Python, Ruby): Can I write good application without knowing exactly the GOF design patterns or I might need some of them which might be crucial and if yes which one, are they alternatives to GOF for specific languages, and should a programmer or a team make its own design patterns set?

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  • Selling your services when you use uncommon technologies

    - by speeder
    I took a look in Stackoverflow most popular profiles, and then I did the same in several other sites, and then I took a look in job postings in several boards, mostly out of curiosity, because I noticed this: If you work with Java, .NET or other managed languages, or you work with stuff that is popular for web development (Ruby, JavaScript, etc...) you can get lots of points on Stackoverflow, find lots of jobs and clients, find forums, friends, colleagues, etc... But how a programmer of uncommon languages (Lua, pure C, Lisp, D, ADA, Haskell, etc...) find information, sell his services, and so on? EDIT: This also applies to fields: You work with web, corporate software, database, etc... it is great... You dislike those previous 3, noone ever will hire your services...

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  • Why does editor color scheme preference seem to vary by language?

    - by Carl Manaster
    I've spent most of my career in C++ and Java, and like most of my peers I have the editor configured to display dark (black with dark-colored syntax highlighting) on a white background. I spent a day this week with Rubyists, and they all seem to favor light text on a dark background. I've observed this before. Why is it? What cultural differences between the Java and Ruby communities explain it? Or is it as simple as these are the default settings for our respective editors?

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  • PHP, MySQL, and temporary tables

    - by dave
    Php novice. 1.Is there anything wrong with this PHP & MySQL code? include_once "db_login.php" ; $sql = "DROP TEMPORARY TABLE IF EXISTS temp_sap_id_select" ; mysql_query ( $sql ) or ( "Error " . mysql_error () ) ; $sql = " CREATE TEMPORARY TABLE temp_sap_id_select ( `current_page` INT NOT NULL, `total_pages` INT NOT NULL, `select_date` DATE NOT NULL, `select_schcode` CHAR(6) NOT NULL, `select_user` CHAR(30) NOT NULL, `select_id` CHAR(9) NOT NULL ) " ; mysql_query ( $sql ) or ( "Error " . mysql_error () ) ; 2.Admittedly, I'm a dull boy, but I'll ask anyway: If I'm using a MySQL GUI and have open the target database, will it be aware of the above temporary table created by PHP/MySQL (IF the temporary table is properly created)?

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  • Dynamics CRM 4.0 Campaign Response Workflow issue

    - by Brett
    Hi I am pretty novice when it comes to CRM so hopefully someone can help me. I am trying to create a workflow that triggers when the campaign response is set to closed and then updates a few fields within the related 'Customers' record. I would have imagined that this would have been straight forward. However, when creating my workflow it appears that the 'Customer' is not in the related entitities list and therefore I cannot set the fields I require updating. I imagine that the issue is to do with the 'Customer' attribute being similar to the 'To'/'From' attributes on an email/phone call activity, whereas I need the attribute to resemble the 'Regarding' attribute. I presume I could create an attribute to replace 'customer' and apply all the appropriate relationships, but I dont really want to do this. Is there a simple way to get around this and/or am I missing something? Cheers

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  • undefined reference linker error

    - by klaus-johan
    Hi, I've stuck myself in a c++ project under linux ,for which I get an undefined reference when I try to create an object of a class that I just wrote.I believe this is an linker error caused by the fact that somewhere , somehow I should tell the linker to take into account the new class. I looked at the project properties and at the run command it executes a script (cmake.sh) . Because the project wasn't created by me , and because I'm a novice in working under linux, I just don't know how to direct the linker to do what I expect him to do !

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  • Would knowing Python help with creating iPhone applications?

    - by Josh
    Here is what the apple site says: With Snow Leopard, Mac OS X makes it easy to use scripting languages as full application development tools. Snow Leopard ships with support for the RubyCocoa Bridge and the PyObjC bridge. These two bridges give developers access not only to system APIs, but to Cocoa frameworks such as AppKit and Core Data, enabling you to build fully native Mac OS X applications in Ruby or Python. The RubyCocoa and PyObjC bridges allow you to freely mix code written in Objective-C with code written in the scripting language. You can quickly build prototypes and then optimise by implementing performance-critical pieces in Objective-C. How could Python help in this case?

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  • How could this diagram of the current most lucrative technologies be improved?

    - by Edward Tanguay
    I'm giving a talk in April 2011 on the "Developer English" and showing my non-developer audience, mostly English teachers, various diagrams to explain how developers see their industry etc. One of these diagrams is "Hot Technologies", basically, if you want to become a developer, what technologies should you learn to have the highest chance of (1) getting a job (2) making a good salary, and (3) work with the most exciting technology. This is a draft I made just to get some ideas out, basically C#, PHP, Java are where the bulk of the jobs are. Mobile development has a big future. JavaScript is becoming more and more important, and I want to list "minor technologies" such a Python, Ruby on Rails to the side, I assume e.g. that in general, there are a much smaller percentage of jobs in these technologies as in C#, PHP, Java. How could this diagram be improved?

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  • What are best practices when giving a presentation to programmers?

    - by blunders
    I've watched 50 plus presentations on programming topics, although most have been online; example, Google Tech Talks -- and have ad-hoc experience on what formats work for programmers, or practices to take into account when presenting to a group of programmers. That said, I'm open to any suggestions, but here's some topic of the top of my head: Programming Jokes, Images, etc. Posting Code for download Contact Info Collecting feedback Presenting Code on Screen If it matters, in this case -- I'm giving a presentation on using a scripting language to extract, transform and load data to a local user group who's focus is the scripting language; Ruby in this case. Questions, feedback, requests -- just comment, thanks!!

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  • How do we add ChoiceGroups dynamically in Java ME (CLDC) based on the answer to previous choice grou

    - by sana
    I am developing a Java ME application for CLDC devices. I have a requirement where the questions are generated based on the previous response. I would start with one choicegroup and then based on the answer to this choices give another set of question to the user- Kind of Yes/No- If Yes this question or No this question. How do we do that? Am novice in mobile app development. Any help in terms of ideas or blog posts or articles is much appreciated and is of great help.

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  • Vim key mappings / plugin XCode?

    - by Daniel Upton
    I'm a developer who mostly does web stuff in ruby and C#.. I'd like to start tinkering with iOS and Mac development, Over the last few month i've been trying to get fluent in one set of key bindings (vi / vim because it just feels right).. I have the awesome ViEmu installed for visual studio on windows which gives me a ton of the vim awesomeness side by side with visual studio power toys.. Is there anything like this for xcode? I know i could set up MacVim as the default editor but i'm not too interested in this as it means losing all of xcode's cocoa awareness.. The other option of course would be to go for the lowest common denominator and switch to emacs (as the mac keybindings are based massively on emacs) but lets not think about that for too long. :P

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  • Is windows a "second class citizen" in the django community?

    - by Daniel Upton
    I'm currently doing R&D for a web application which we plan to host ourselves initially and then allow customers to self host. My task has been evaluating web frameworks to see which would give us the biggest productivity initially and ease of maintence while also allowing us to easily support deployment to customer controlled environments. Our team has experience with ASP.NET (MVC and Webforms) and Ruby on Rails. Our experience with rails is that windows deployment is a very taboo subject and any questions on IRC or SO are met with knee jerk "why not linux" responses.. However in this case our target market may be running windows or linux servers. Is this also the case in django land? Is it possible with rubbish performance? Is it possible with lost of pain? Is it seen as reasonable and not treated as a completely stupid idea for not wanting to run linux?

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  • Architecture guidelines for a "single page web-app"

    - by Matt Roberts
    I'm going to start a side project to build a "single page" web application. The application needs to be real-time, sending updates to the clients as changes happen. Are there any good resources for best-practice approaches wrt the architecture for these kinds of applications. The best resource I've found so far is the trello architecture article here: http://blog.fogcreek.com/the-trello-tech-stack/ To me, this architecture, although very sexy, is probably over-engineered for my specific needs - although I do have similar requirements. I'm wondering if I need to bother with a sub/pub at the server side, could I not just push updates from the server when something happens (e.g. when the client sends an update to the server, write the update to the db, and then send an update to the clients). Tech-wise, I'm probably looking to build this out in Node.JS or maybe Ruby, although the architecture guidelines should to some extent apply to any underlying server technologies.

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