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• PHP to serial with weird baud rates

  - by aloishis89

  I am trying to use PHP to send text to an LED sign so I can send support ticket numbers to it. The sign itself is a piece of work; it came from eBay and is poorly made with almost no documentation. After fiddling with it for a while, I was able to figure out the way it expected stuff to be sent to it and that the baud rate is 28800. I already know how to communicate with stuff like this using PHP, but I don't know how to change the baud rate to something nonstandard. I've tried other baud rates, and haven't been able to get it to work.

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• Communicate multiple times with a process without breaking the pipe?

  - by Manux

  Hello, it's not the first time I'm having this problem and its really bugging me. Whenever I open a pipe using the Python subprocess module, I can only communicate with it once, as the documentation specifies: Read data from stdout and stderr, until end-of-file is reached proc = sub.Popen("psql -h darwin -d main_db".split(),stdin=sub.PIPE,stdout=sub.PIPE) print proc.communicate("select a,b,result from experiment_1412;\n")[0] print proc.communicate("select theta,zeta,result from experiment_2099\n")[0] The problem here is that the second time, Python isn't happy. Indeed, he decided to close the file after the first communicate: Traceback (most recent call last): File "a.py", line 30, in <module> print proc.communicate("select theta,zeta,result from experiment_2099\n")[0] File "/usr/lib64/python2.5/subprocess.py", line 667, in communicate return self._communicate(input) File "/usr/lib64/python2.5/subprocess.py", line 1124, in _communicate self.stdin.flush() ValueError: I/O operation on closed file So... multiple communications aren't allowed? I hope not ;) Please enlighten me.

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• How to implement GCM in Google AppEngine?

  - by Broken System

  I'm a PHP Developer and Web Designer. In my work a partner asked me if I could set up a Google Cloud Messaging server. I read the documentation but couldn't find a clear tutorial to set up this server. I got no knowleadge about Java so it makes my job harder. I could "compile" a war file using ant as GCM Demo Tutorial says. But I can't deploy it to my AppEngine server to try it out (It's my first time using AppEngine too). Could you give me some steps to create my own GCM server? Sorry about my bad english. Thanks!

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• When using DrawText, what does TextFormatFlags.Internal (a.k.a. DT_INTERNAL) do?

  - by Daniel Stutzbach

  When using TextRenderer.DrawText(), what does setting the TextFormatFlags.Internal flag actually do? Equivalently, what does setting the DT_INTERNAL flag to Win32's DrawTextEx() function do? More to the point, when should I set that flag and when should I not set it? The documentation says: "Uses the system font to calculate text metrics", but I'm not entirely sure what that means. I've done some limited testing and setting the flag seems to change how the font is rendered when using a small font size, but doesn't seem to make a difference when using a large font size.

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• Analysis and Design for Functional Programming

  - by edalorzo

  How do you deal with analysis and design phases when you plan to develop a system using a functional programming language like Haskell? My background is in imperative/object-oriented programming languages, and therefore, I am used to use case analysis and the use of UML to document the design of program. But the thing is that UML is inherently related to the object-oriented way of doing software. And I am intrigued about what would be the best way to develop documentation and define software designs for a system that is going to be developed using functional programming. Would you still use use case analysis or perhaps structured analysis and design instead? How do software architects define the high-level design of the system so that developers follow it? What do you show to you clients or to new developers when you are supposed to present a design of the solution? How do you document a picture of the whole thing without having first to write it all? Is there anything comparable to UML in the functional world?

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• What issues carry the highest risk in a software project?

  - by Mehrdad Afshari

  Clearly, software projects are different from other industries in terms of many things like for instance, quality assurance, project progress measurement, and many other things. Unique characteristics of software projects also makes the risk management process unique. Lots of issues in a project might lead it to unacceptable delay or failure to deliver business value. They might even make a complete disaster in the project. What are the deadliest risk factors in a software project? How to analyze, prevent and handle them? Particularly, I'm interested in the issues that you can detect from the beginning and you should keep an eye on (for example, you might be told about a third-party API that the current application uses and lacks documentation). Please share your experiences if they are relevant.

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• Where can I find boost::fusion articles, examples, guides, tutorials?

  - by Kyle

  I am going to go ahead and shamelessly duplicate this question because the accepted answer is essentially "nope, no guides" and it's been nearly a year now since it's been asked. Does anyone know of any useful articles, guides, tutorials, etc. for boost::fusion besides the barebones documentation on boost.org? (which I'm sure is great as a reference after one has learned the library.) I'm completely open to, say, a link to a book on Amazon. Searched for it myself just now but all I came up with was green tea. The top links on Google aren't much better.

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• How to automate login to Google API to get OAuth 2.0 token to access known user account

  - by keyser_sozay

  Ok, so this question has been asked before here. In the response/answer to the question, the user tells him to store the token in the application (session and not db, although it doesn't matter where you store it). After going through the documentation on Google, it seems that the token has an expiration date after which it is no longer valid. Now, we could obviously automatically refresh the token every fixed interval, thereby prolonging the lifespan of the token, but for some reason, this manual process feels like a hack. My questions is: Is this most effective (/generally accepted) way to access google calendar/app data for a known user account by manually logging in and persisting the token in the application? Or is there another mechanism that allows us to programmatically login to this user account and go through the OAuth steps?

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• TeamCity Mercurial, How to handle tags and releases

  - by Garrett

  Hi First off, i'm new to Teamcity comming from CC. I have a server up and running and building my projects, so far so good :). My problem is this: Whenever I make a Mercurial Tag, I would like TeamCity to react in a special way, so that the resulting binaries/artifacts from the Tag build, are made avaliable for download (automatic release when tagging). In short can I do automated release so that when I create a Tag AND it builds successfully then the result is copied to some location X, but ONLY when I Tag. Im pretty sure that this can be done, but when I read the posts around the net and read the documentation, I tend to get a little confused about artifacts/build scripts/publishing and how to do it. Can anyone give me some hints about where/how to start or guide me to a location with a tutorial/example of how to do this? I want it soooooo bad :-D. Kind regards

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• Run a javascript function on script load

  - by user188870

  I am using jQuery. I keep all of my function definitions wrapped in the $(document).ready event in application.js. I have a function from it that I would like to call somewhere in the body of the page I am working on. I was wondering if there is some alternative to the .ready event that will work on a script load. Ideally I would like to do something like: $('application.js').ready( call function ); In the jQuery documentation it only mentions the $(document).ready call but I was wondering if this can be altered or if there is some plain javascript alternative.

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• Compiling Qt for Windows 98

  - by wrp

  I need to support Windows 98. The Qt documentation claims this is possible, but there are no instructions. The distributed binaries don't run on Win98 and the majority of Qt applications I have sampled also don't. For several apps that do run on 98, I have asked authors how they did it, but the common answer is that it was accidental and they don't know what factors caused it. In searching the forums for help, I found only guesses that turned out to be wrong. For example, one belief is that to compile for Win9x, you must build the tools and the apps on that platform. Yet, things I found to run were built on newer versions of Windows. What is required to build the Qt dev tools and then applications for Win98? How about cross-compiling from WinXP or Linux? Are there specific components that can't be made to run on Win98? Are there particular difficulties with dynamic or static linking for Win98 support?

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• is XULRUNNER suitable as a replacement for other C++ desktop applications frameworks such as QT?

  - by Gabriel Cuvillier

  XulRunner/Gecko seems to be really interesting for developing gui-intensive applications (by using widely used technologies such as HTML / CSS / SVG / XUL / Javascript). But the underlaying C++ APIS (XPCOM, NECKO, ...) looks so old and complex. Moreover the general lack of documentation/developper tools is really frightening. On the other hand, QT have a quite nice platform, and is well documented and supported. The UI part is really "traditional" though. What are your experiences with XULRUNNER, specially compared to other C++ desktop applications frameworks such as QT/GTK/MFC...? What is missing? What is awesome? Side question: If I wanted to migrate an existing MFC app to a cross platform C++ desktop application framework, would it be wise to use XULRUNNER instead of QT or GTK?

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• Android and Google Maps API - Icons

  - by oriharel

  I want to place markers on the map. I want to use the standard Google Maps icons for markers. how do I use them? I don't want to create my own icons. I'm developing for Android. in the documentation they tell me to create a class that overrides ItemizedOverlay but in the constructor I'm asked to provide a drawable object. how do I point to the standard Google Maps ones? thanks.

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• Count of memory copies in *nix systems between packet at NIC and user application?

  - by Michael_73

  Hi there, This is just a general question relating to some high-performance computing I've been wondering about. A certain low-latency messaging vendor speaks in its supporting documentation about using raw sockets to transfer the data directly from the network device to the user application and in so doing it speaks about reducing the messaging latency even further than it does anyway (in other admittedly carefully thought-out design decisions). My question is therefore to those that grok the networking stacks on Unix or Unix-like systems. How much difference are they likely to be able to realise using this method? Feel free to answer in terms of memory copies, numbers of whales rescued or areas the size of Wales ;) Their messaging is UDP-based, as I understand it, so there's no problem with establishing TCP connections etc. Any other points of interest on this topic would be gratefully thought about! Best wishes, Mike

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• (Visual) C++ project dependency analysis

  - by polyglot

  I have a few large projects I am working on in my new place of work, which have a complicated set of statically linked library dependencies between them. The libs number around 40-50 and it's really hard to determine what the structure was initially meant to be, there isn't clear documentation on the full dependency map. What tools would anyone recommend to extract such data? Presumably, in the simplest manner, if did the following: define the set of paths which correspond to library units set all .cpp/.h files within those to belong to those compilation units capture the 1st order #include dependency tree One would have enough information to compose a map - refactor - and recompose the map, until one has created some order. I note that http://www.ndepend.com have something nice but that's exclusively .NET unfortunately. I read something about Doxygen being able accomplish some static dependency analysis with configuration; has anyone ever pressed it into service to accomplish such a task?

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• How can I trigger an image load by clicking other element rather than the image itself (Lazy Load jQuery plugin)?

  - by janoChen

  In the Lazy Load plugin's documentation (A jQuery plugin that loads images only when an event occurs) says: Event can be any jQuery event such as click or mouseover. You can also use your own custom events such as sporty or foobar. Default is to wait until user scrolls down and image appears on the window. To prevent all images to load until their grey placeholder image is clicked you could do: $("img").lazyload({ placeholder : "img/grey.gif", event : "click" }); In this case is clicking the image, but how can I trigger the image load by clicking other element rather than the image itself (say an anchor link/button)?

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• Attaching files to WCF REST service responses

  - by David Seiler

  I have a resource that looks something like this: /users/{id}/summary?format={format} When format is "xml" or "json" I respond with a user summary object that gets automagically encoded by WCF - fine so far. But when format equals "pdf", I want my response to consist of a trivial HTTP response body and a PDF file attachment. How is this done? Hacking on WebOperationContext.Current.OutgoingResponse doesn't seem to work, and wouldn't be the right thing even if it did. Including the bits of the file in a CDATA section or something in the response isn't safe. Should I create a subclass of Message, then provide a custom IDispatchMessageFormatter that responds with it? I went a short distance down that path but ultimately found the documentation opaque. What's the right thing?

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• Zend Framework on a Shared Host

  - by manyxcxi

  I am trying to push my first ZF project to my shared hosting provider. I have done a lot of testing on my home server and everything is working great. My issue is that I do not know how to set up my .htaccess files on the shared hosting provider to make it work correctly. The ZF documentation says to configure my Apache config VirtualServer DocumentRoot to /whatever/path/project-folder/public, but I don't have that kind of access. How do I get around this? I have seen http://stackoverflow.com/questions/1115547/zend-framework-on-shared-hosting but none of those solutions have worked for me. My application path looks like this / - .htaccess - /application ... - /public -- .htaccess -- index.php -- ... ... My .htaccess files look like: /.htaccess RewriteEngine On RewriteRule !\.(js|gif|jpg|png|css|txt)$ public/index.php [L] RewriteCond %{REQUEST_URI} !^/public/ RewriteRule ^(.*)$ public/$1 [L] /public/.htaccess RewriteEngine On RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ index.php [NC,L]

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• Import module stored in a cStringIO data structure vs. physical disk file

  - by Malcolm

  Is there a way to import a Python module stored in a cStringIO data structure vs. physical disk file? It looks like "imp.load_compiled(name, pathname[, file])" is what I need, but the description of this method (and similar methods) has the following disclaimer: Quote: "The file argument is the byte-compiled code file, open for reading in binary mode, from the beginning. It must currently be a real file object, not a user-defined class emulating a file." [1] I tried using a cStringIO object vs. a real file object, but the help documentation is correct - only a real file object can be used. Any ideas on why these modules would impose such a restriction or is this just an historical artifact? Are there any techniques I can use to avoid this physical file requirement? Thanks, Malcolm [1] http://docs.python.org/library/imp.html#imp.load_module

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• Setup sonar-runner for multiple java projects

  - by zetafish

  I am trying to run sonar-runner to analyze multiple Java projects in one go. According to the documentation http://docs.codehaus.org/display/SONAR/Analyse+with+a+simple+Java+Runner it is just a matter of creating a sonar-project.properties file for each project. But it is not clear to me where exactly I have to put these sonar-project.properties files. I tried to add multiple .properties files in the $SONAR_RUNNER_HOME/conf folder but the runner does not seem to pick them up. It only sees the sonar-project.properties file. Any suggestions on how to run sonar-runner for multiple projects?

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• OpenLayers FramedCloud Autosizing

  - by Kyle

  According to the documentation, I should be able to configure the size of my OpenLayers popup by declaring an OpenLayers.Size object in the FramedCloud constructor: this.popup = new OpenLayers.Popup.FramedCloud('featurePopup', this.options.feature.geometry.getBounds().getCenterLonLat(), new OpenLayers.Size(80, 60), this.template(this.formattedAttrs()), null, true, this.onPopupClose ); Currently the popup that is rendered is autosized no matter what dimensions I use in the constructor. I've tried manually setting the autosizing attribute of the FramedCloud to false as well as manually adjusting the css styling for the popup without achieving the results I need. I checked and found some similar issues in the OpenLayers 2.11 issues list, but I haven't found a workaround. Any ideas?

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• How to read and write UTF-8 to disk on the Android?

  - by Rob Kent

  I cannot read and write extended characters (French accented characters, for example) to a text file using the standard InputStreamReader methods shown in the Android API examples. When I read back the file using: InputStreamReader tmp = new InputStreamReader(in); BufferedReader reader = new BufferedReader(tmp); String str; while ((str = reader.readLine()) != null) { ... the string read is truncated at the extended characters instead of at the end-of-line. The second half of the string then comes on the next line. I'm assuming that I need to persist my data as UTF-8 but I cannot find any examples of that, and I'm new to Java. Can anyone provide me with an example or a link to relevant documentation?

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• How to validate data for a Rest Service with symfony

  - by Nicolas V.

  For example imagine I've a rest service, this service takes two parameters : phone number text The goal is to send the message via a sms gateway. I've a class Message which has two properties destinationNumber and textMessage. Before calling the gateway, I want to validate the data received by the rest service. I've two questions relatives to how to validate the data : Where should I put the validation rules ? in the model or in the controller How should I use the sfValidator* classes from Symfony to validate the data (ie. where's the documentation for using sfValidator or where can I find some examples) Any help would be appreciated.

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• PhysX: Joint friction/"stiff" joints

  - by SigTerm

  I'm working with physx (trying to add ik to ragdoll) at the moment. For some reason, all ragdoll joints are frictionless, and as a result, ragdoll tend to "wobble", especially when it is hung in the air and is connected to several moving kinematic actors. I would like to add friction to the joints and make them "stiff". Imagine a door (with extremely rusty hinge) that needs to be kicked several times to be open - i.e. it rotates around the hinge, but not much, quickly stops, and large force is required to make it rotate. Or think about art manikins (see google images for pictures) - their limbs move around, but they do not swing around freely. Unfortunately, I can't find anything related to joint friction in physx. I've checked documentation, google, and headers, and couldn't find anything useful. So, how do I implement stiff joints/joint friction with physx? (I think) I've seen physx games without that problem, so apparently there should be some way to do that.

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• Multiple ports listed in SQL Server connection string

  - by BBlake

  I have a legacy VB6 app where the servername, databasename, username, etc are defined in an INI file, but the port number for the connection string (the default 1433) is hard coded in the app. It's being moved to a new sql server back end that runs off a different port number. I'm trying to avoid having to alter and recompile the application which entails signifigant retesting, documentation, etc. I tried altering the INI file so that for the new server I have put in: SERVERNAME\INSTANCE,NEWPORTNUMBER This effectively builds the connection with Data Source = SERVERNAME\INSTANCE,NEWPORTNUMBER,1433; This appears to work correctly as it connects to the database when I run the app. It appears to me that the ,1433 portion is being ignored. Is this a valid assumption or will this cause me some problem I'm not seeing here?

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