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• Multiple port asynchronous I/O over serialport in C#

  - by firoso

  I'm trying to write a test application for serial I/O (RS-232) with multiple units in C# and I'm running into an issue with my lack of threading experience so I'm soliciting feedback for a best known method. I've got a pool of COM ports COM1-16 each of which can read/write at any time and I need to be able to manage them simultaneously. Is this a situation for a thread pool? What is some guidance on structuring this applet? Edit: Upon review I was wondering is I really even need to do asynchronous threads here, I could just maintain states for each COM-port and do flow logic (i.e., statemachine) for each COM-port individually.

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• Twitter like status message using jquery...

  - by Pandiya Chendur

  I am using this jquery javascript function to show status message, function topBar(message) { $("<div />", { 'class': 'topbar', text: message }).hide().prependTo("body") .slideDown('fast').delay(4000).slideUp(function() { $(this).remove(); }); } and my css: .topbar { background: #476275; border-bottom: solid 2px #EEE; padding: 3px 0; text-align: center; color: white; font-family:Arial,Helvetica,sans-serif; font-size:135%; font-weight:bold; }? I am getting my status message but what it does it inserts a div within the body tag instead i want the message to display out of the body(z index) exactly like twitter (ie) just flow my message from top and hide it... Any suggestion.... Hope you got my question..

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• User Interface functionality modelling languages?

  - by naugtur

  I am looking for a UI functionality modelling language (UML-alike "thing", but for user interfaces) that is already accepted and maybe has its design patterns and handles the problem better than state or activity diagram. (If there is no such thing I'm planning to develop that BTW :)) This question came to mind as a result of a discovery that UML and its diagrams fails at describing complicated UI functionality with event-driven flow of execution (ie. javascript/jQuery big projects) EDIT: I've been thinking of using BPMN but It was not created for this purpose. EDIT2: See this community topic of mine - I decided to start developing said language.

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• Where to start when programming process synchronization algorithms like clone/fork, semaphores

  - by David

  I am writing a program that simulates process synchronization. I am trying to implement the fork and semaphore techniques in C++, but am having trouble starting off. Do I just create a process and send it to fork from the very beginning? Is the program just going to be one infinite loop that goes back and forth between parent/child processes? And how do you create the idea of 'shared memory' in C++, explicit memory address or just some global variable? I just need to get the overall structure/idea of the flow of the program. Any references would be appreciated.

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• Can't see images used in slideshow or other jQuery plug-ins in Internet Explorer 8

  - by Kais

  I am getting a weird error. I can see images in slideshow, lightbox, etc. in Firefox and Chrome but in Internet Explorer 8 there are no images. Something is wrong with JavaScript/jQuery I think. I am using jQuery 1.4.2, jquery.flow.1.2.min.js jquery.bgpos.js jquery.easing.1.3.js jquery.lightbox-0.5.min.js jquery.validate.js cufon-yui.js jquery.galleriffic.js DD_belatedPNG.js clearbox.js Please check this. I have pasted images under slideshow, you can see those at http://kaisweb.com/projects/resume/ and http://kaisweb.com/projects/resume/index.php?p=templates. I tried to search but couldn't find anything. Even if I remove jQuery, still there are no images in Internet Explorer 8.

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• jgraph like component on vaadin framework

  - by vsp

  Hi, Currently I am working on a process manager kind application, which needs jgraph( http://www.jgraph.com ) kind of component. The process manager is a kind of process flow chart. I am currently using vaadin framework. Is there any such built in components available in vaadin or can i have any plugin to create a drag & drop graph for my app. Please let me know if any one has already done this. Thanks.

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• Why uses git fast-forward merging per default?

  - by Florian Pilz

  Coming from mercurial, I'm using branches to organize features. Naturally I want to see this work-flow in my history as well. But I started my new project with git and finished a feature. After merging I realized that git used fast-forward and forgot about my branch. So to think into the future: I'm the only one working on this project. If I use the default approach of git (fast-forward merging) my history would result in one giant master branch. I don't want this and can't see any good reason making this default. Maybe there are reasons, but what's so striking about it, that it has to be the default action?

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• Is there an ftp plugin for gedit that will let me work locally?

  - by RobertWHurst

  I'm trying to switch from a windows environment to Linux. I'm primarily PHP developer, but I do know quite a bit about other languages such as CSS, XHTML and Javascript. I need a way of editing my files locally because I work in a git repository and need to commit my saves. On windows I used Aptana and PDT. I'd save my files, upload via Aptana, then commit my work with git. I need to get a work flow going on my Linux machine now. If you know a better way to do this let me know, however my real question is, is there a plugin that allows gedit to upload files instead of working remotely?

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• Is it wrong to get feedback from Stack Overflow on a live system architecture?

  - by hal10001

  I am the technical director at a startup, and I will eventually be tasked with implementing a "real" system architecture when we hire more programmers. Right now our clients are small enough, and it is just me, so documented deployments, source control, unit tests and quality assurance servers are non-existent. Eventually I will need to devise a work-flow and architecture patterns for the majority of the work we will do (e-commerce). If I posted an architecture diagram, and asked for feedback, would that be a misuse of the Stack Overflow system? I don't want to get into that battle of "hey, don't ask us to do your job for you", but the reality is that any programmer who eventually moves into this realm will have to figure it out with feedback from other developers. HighScalability.com is what comes to mind when I think about this sorta thing in terms of the knowledge I need. So if this is not the right kind of forum for that, then any book recommendations or white papers you can recommend would be appreciated.

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• Cannot loop through Excel 2003 files in SSIS 2008

  - by Techspirit

  Hi, I am trying to execute a SSIS 2008 package on a 64-bit OS and import Excel 2003 files to SQL Server 2008. I have created an OLEDB Connection to the Excel file with a Connection String that retrieves the Excel file from a variable, inside the ForEach Loop Container. The Run64BitRunTime is set to false. I am not able to edit the SQL Command on the OLEDB Source in the Data Flow task. It returns an error : Error 2 Validation error. Load List Staged Table: Load List Staged Table: SSIS Error Code DTS_E_CANNOTACQUIRECONNECTIONFROMCONNECTIONMANAGER. The AcquireConnection method call to the connection manager "List OLEDB to Excel" failed with error code 0xC0202009. There may be error messages posted before this with more information on why the AcquireConnection method call failed. 0 0 Appreciate any help.

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• Call method with parameters after animation completion

  - by Jean

  I want to call a method with certain parameters once an animation is done. The flow is something like this: -(void) myMethod:(int)val { [self performAnimation]; [self doSomethingElse:val]; // This should be done after animation completion } I presume the 'doSomethingElse' method needs to be called from the method defined in 'setAnimationDidStopSelector' - or is there a way to have the animation block until done? What is the best way to let the method called on 'setAnimationDidStopSelector' know about the method it needs to call and its parameter? Can this be done with selectors? Or is the only way of doing this by storing the methods and its params in class temp variables and access them when needed?

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• SSIS Runs Okay Individual Tasks, Not Together

  - by davemackey

  I have a simple SSIS Project. In the control flow I have three steps: Step 1: Select Data from Db1.Table1 Step 2: Create Table2 in Db2 Step 3: Copy Data in Db1.Table1 to Db2.Table2 If I "Execute Task" one by one in order, it executes fine...but if I try running the entire project I receive the following error: Error at Copy Data from Table1 to DB2 dbo Table2 Task [OLE DB Destination[40]]: SSIS Error Code DTS_E_OLEDBERROR. An OLE DB error has occurred. Error code: 0x80040E37. An OLE DB record is available. Source: "Microsoft OLE DB Provider for SQL Server" Hresult: 0x80040E37 Description: "Invalid object name 'DB2.dbo.Table2".".

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• Application of a rule based expert system

  - by simon

  Hi, The company I am working now has developed a Rule-based Expert System. It is a web-based system and supports Flow Chart, Decision Table, Fuzzy Rules and Forward Chaining Rules. It is something like iLog but less complex and powerful. However, one serious problem we are facing now is that we have NO CUSTOMER so far. We have spent 4 yrs to develop that product. Because my company is a start-up and has no reference, no one is confident in our product. Without feedback, we cannot improve our product. I am wondering if we should change our product into SAAS and make it free for people to try, or it has NO MARKET at all. (I will lose my job then..) Please give me some suggestions. Many Thanks!

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• Modeling software for network serialization protocol design

  - by Aurélien Vallée

  Hello, I am currently designing a low level network serialization protocol (in fact, a refinement of an existing protocol). As the work progress, pen and paper documents start to show their limits: i have tons of papers, new and outdated merged together, etc... And i can't show anything to anyone since i describe the protocol using my own notation (a mix of flow chart & C structures). I need a software that would help me to design a network protocol. I should be able to create structures, fields, their sizes, their layout, etc... and the software would generate some nice UMLish diagrams.

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• Can anyone help me out in writing a xslt-fo for this xml file?

  - by atrueguy

  Currencies By Country Australia Australian Dollar Austria Schilling Belgium Belgium Franc Canada Canadian Dollar England Pound Fiji Fijian Dollar France Franc Germany DMark Hong Kong Hong Kong Dollar Italy Lira Japan Yen Netherlands Guilder Switzerland SFranc USA Dollar I started to write a xsl-fo to format the above xml in to a table, but I am really struggling with the flow of the tags, can any one help me out in writing a xsl-fo for this xml file? Is it possible for anyone to suggest me material for staring with xsl-fo, so that I can code my own xsl-fo., because the tags and syntax are very difficult to understand.

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• Should you remove all warnings in your Verilog or VHDL design? Why or why not?

  - by Brian Carlton

  In (regular) software I have worked at companies where the gcc option -Wall is used to show all warnings. Then they need to be dealt with. With non-trivial FPGA/ASIC design in Verilog or VHDL there are often many many warnings. Should I worry about all of them? Do you have any specific techniques to suggest? My flow is mainly for FPGAs (Altera and Xilinx in particular), but I assume the same rules would apply to ASIC design, possibly more so due to the inability to change the design after it is built.

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• How do i deploy UAT and Development SharePoint solution on the same server ?

  - by Nikhil Vaghela

  I am working on a SharePoint 2010 Server and i have following items in my SharePoint solution Couple of web parts State Machine Work flow (which will be integrated to an Infopath form library) Infopath task edit forms Lets say this solutions is deployed to http://[SharePoint201Server]:[PortNumber-x]/ This is the only server i have (No extra server for UAT), and what ever has been done so far needs to be given for user acceptance testing (UAT). I may create one more site at http://[SharePoint201Server]:[PortNumber-y]/ for it. My problme is that how do i maintain two copies of my source code ? I will have to continue development on the same set of source code for next UAT release. I simply can not create simple copies of the source code as it will have same Assembly name and feature id, etc..As if i do so, any changes on under Development source code would affect UAT assemblies. One thing i can do is to create seperate projects for UAT and Development with different Features and Assembly names, but is not that too much of an unneccesory work ? What can be the best approach in such situation ?

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• Xcode / Interface Builder - better workflow from designer to coder?

  - by tbarbe

  Were dealing with some pretty custom UI elements while building our OSX / Cocoa and iPhone / IPad apps. I was wondering if anyone has good recommendations or tricks for getting a better workflow between UI designers and coders while using Xcode / Interface Builder? It seems that many things require programmatic settings with UI editing in Cocoa... if you stray from the pre-built UI elements then you can't really easily drag-drop build a UI... instead we end up handing off a design doc ( photoshop/illustrator ) and then the poor developer has to deal with recreating this masterpiece in code or by using interface builder - usually a combination of both. This work flow is leading us to not so great results and we have to re-iterate around the UI elements to get them to work better. We love CSS and / or Flash designer to developer workflow where the UI could look exactly as it should and the hand off to developer was more seamless. Is there anyone out there who has some tricks - or insights into getting better workflow when using tools like Xcode / Interface Builder and doing Cocoa apps?

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• Save/restore git/cvs checkout changes when switching branches?

  - by Dale Forester

  Using cvs, git or another technique (file system level?), I would like to: Make modifications on branch A Checkout branch B: Changes to branch A are "stowed away" (by name would be nice), branch B is checked out such that my branch A changes are gone Make modifications on branch B Checkout branch A: Changes to branch B are "stowed away" (by name would be nice), branch A is checked out such that my branch B changes are gone but now my "saved" branch A changes from Step #2 are back Git-stash does not appear to fit the flow I'm describing although my impression could be wrong. Techniques involving RCS's or file system or command-line tools or otherwise are welcome.

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• REST API unauthenticated requests exception based on the User-Agent

  - by Shay Tsadok

  Hi All, I am developing a REST API that supports two kinds of authentication protocols: login form authentication - for browser based clients. Simple Basic authentication - for non-browser clients. I developed a flow in which unauthenticated requests redirected to the "login form", the problem is that this is an undesired behavior for non-borwser clients! I thought to solve it by decide according to the "User-Agent" what to do: browsers will be redirected to the "login form" and non-browser clients will get the standard 401:Basic Authentication. A. What do you think about this solution? B. Is there a standard way in Java to check if the request came from browser, or do i need to develop this kind of mechanism by my own? Thanks in advance!

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• IOS where to put the configuration of facebook sdk

  - by Carol Smith

  I am trying to integrated my IOS 7 application with Facebook SDK I following this official tutorial https://developers.facebook.com/docs/ios/getting-started which states Configure the .plist Follow these three steps: Create a key called FacebookAppID with a string value, and add the app ID there. Create a key called FacebookDisplayName with a string value, and add the Display Name you configured in the App Dashboard. Create an array key called URL types with a single array sub-item called URL Schemes. Give this a single item with your app ID prefixed with fb. This is used to ensure the application will receive the callback URL of the web-based OAuth flow. The finished .plist should look something like this: My question is where to put these values? They already put this image, maybe it helps you to answer me Edit The problem that I don't have any plist file in my framework in xcode and I can't add a new one because if i did, I would have to add all the variables that you see in the image but the tutorial just stated about some of them

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• Choosing a plotting library for web/browser application

  - by Goro

  Hello, I am looking for a plotting/graphing library (mostly to do line plots) for my application. I have been looking at JavaScript APIs (like Google's) but I found them to be slowing down things at client side (I am plotting a quite large number of points). I also found that with client-side libraries, the performance was quite varied depending on the user's computer. With moving to a server-side library I would cut down on this variance, and would have more control over data flow (my data is in a MySQL database). I have then looked at some PHP-based plotting libraries, but a lot of them seem to be "forgotten" (no new version for years). I have been eying pChart, but it has not had an update in almost two years. First, what would you recommend: server-side or client-side approach? Second, what library would you recommend. Paid libraries are definitely an option, as I don't mind paying for quality software that would cut down on my development time. Thanks,

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• Mule Performing a string manipulation

  - by user2910309

  What is the best way to perform a string manipulation. I wish to perform a substring on a email address to extract the domain detail and populate this to a variable. a java transformer is a possibilty, but i was hoping if i could use a message enricher with a expression to perform this operation. pardon me but i am still a greenhorn on Mule. here is the excerpt from my mule flow which is failing with error cannot resolve method string length. <enricher target="#[flowVars['FromAddressDomain']]" doc:name="Message Enricher"> <expression-transformer expression="#[ payload.fromAddr.substring(payload.fromAddr.lastIndexOf('@')+ 1,payload.fromAddr.lenth())]" doc:name="Expression"></expression-transformer> </enricher>

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• Develop an classic UI or be bold with a newer design?

  - by DeanMc

  Forgive me if this is the wrong place but I am curious as to how other programmers feel about this topic: I am currently working on my portfolio site, it is being designed and built in silverlight 4. I initially started off with a typical stylised e-folio theme much like a standard website in terms of layout and flow. As I work more in the concept stages something has struck me. Am I trying to shoe-horn yesterday into today? What I am talking about is UI expectations. I'm all for clean user interfaces but that does not mean they should not take advantage of new concepts in presentation right? If you where to develop a site in silverlight as your own portfolio piece would you stick to the tried and tested "website" feel or would you try to come up with a UI that is intuitive and complements the technology? I feel that UI discussions are all the more important now that all forms of web development are allowing better methods to engage the user.

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• Optimum encoding standard for flowplayer to play mp4

  - by renjucool

  I'm using flow player 3.1.1 for streaming videos to my browser.The videos are uploaded by the users and they may upload different formats. What will be solution to stream the videos as mp4 , what ever be the format they upload. I'm currently using ffmpeg commands. ffmpeg -i "InputFile.mp4" -sameq -vcodec libx264 -r 35 -acodec libfaac -y "OutputFile.mp4" But video files of more size(say 100mb) are taking a minute more for laoding in to the flowplayer and buffering. I think the problem with my encoding. Welcome your valuable Suggestions!!!

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