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• How to get real-time status notification with Facebook SDK via listener

  - by Mathias Lin

  I'm using Twitter4j and the Android Facebook SDK to fetch status messages. With Twitter4J I get real-time notifications whenever a new status has been added to the stream via StatusListener (Twitter4J). In the Facebook SDK I cannot find a similar way, I can only fetch entire streams over and over again in a fixed time interval using RequestListener (Facebook SDK) as far as I see it. Is there any way to get notified of new statuses in realtime with the Facebook SDK in a similar way as with Twitter4J? (Found a similar but unanswered question here: Facebook real-time updated application wall)

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• Cocoa Core Data - Efficient Related Entities Counts

  - by Gary

  I am working on my first iPhone application and I've hit a wall. I'm trying to develop a 'statistics' page for a three entity relationship. My entities are the following: Department - Name, Address, Building, etc. People - Name, Gender (BOOL), Phone, etc If I have fetched a specific department how do I filter those results and only return people that are Male (Gender == 0)? If I do NSLog(@"%d", [department.people count]); I get the correct number of people in that department so I know I'm in the neighborhood. I know I could re-fetch and modify the predicate each time but with 20+ stats in my app that seems inefficient. Thanks for any advice!

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• Silverlight Scrollable Content Problem

  - by Steve

  I am fairy new to Silverlight and I have a problem. I have a grid on a page that is resizable when the user resizes their browser window. In one of the grids columns I want to display dynamically added content that is scrollable, as there is more data than space available. I currently have a scrollViewer with a stack panel inside it, that i programmatically add a user control to and then several user controls to that control depending on the amount of content. My problem is this. The scrollViewer does not respect the available space and as such displays its content outside of the viewable area when there is more data than space. i.e. it does not uses it is not scrollable nature. Hopefully this is something simple that I have missed, but i am banging my head against the wall at the moment. Any help gratefully received.

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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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• Integrating Facebook and example.com

  - by user366292

  I'm creating web site where you can add idea and comment it. Last week I have been looking for Facebook integration. So you can post idea from Facebook or Example.com. You should also be able to comment ideas from Facebook and Example.com. Two interfaces, one result. Is that possible? And is the Facebook application only solution? What about Facebook group wall? -- UPDATE I have Facebook and Example.com. I would like to have full integration between those. Messages and comments sent from Facebook shows on Example.com and vice versa.

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• "Socket operation on non-socket" error due to strange syntax

  - by Robert S. Barnes

  I ran across the error Socket operation on non-socket in some of my networking code when calling connect and spent a lot of time trying to figure out what was causing it. I finally figured out that the following line of code was causing the problem: if ((sockfd = socket( ai->ai_family, ai->ai_socktype, ai->ai_protocol) < 0)) { See the problem? Here's what the line should look like: if ((sockfd = socket( ai->ai_family, ai->ai_socktype, ai->ai_protocol)) < 0) { What I don't understand is why the first, incorrect line doesn't produce a warning. To put it another way, shouldn't the general form: if ( foo = bar() < baz ) do_something(); look odd to the compiler, especially running with g++ -Wall -Wextra? If not, shouldn't it at least show up as "bad style" to cppcheck, which I'm also running as part of my compile?

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• LINQ DataLoadOptions - Retrieval of data via Fulltext/Broken Foreign Key Relationship

  - by Alex

  I've hit a brick wall: I have an SQL Function: FUNCTION [dbo].[ContactsFTS] (@searchtext nvarchar(4000)) RETURNS TABLE AS RETURN SELECT * FROM Contacts INNER JOIN CONTAINSTABLE(Contacts, *, @searchtext) AS KEY_TBL ON Contacts.Id = KEY_TBL.[KEY] which I am calling via LINQ public IQueryable<ContactsFTSResult> SearchByFullText(String searchText) { return db.ContactsFTS(searchText); } I am projecting the ContactsFTSResult collection into a List<Contact> which is then given to my viewmodel. Here is the problem: My Contacts table (and therefore the Contact object created via LINQ to SQL) has multiple FK relationships to other information, such as Contact.BillingAddressId is an FK to an Address.Id. That information is missing after I do the fulltext search (e.g. if I try to access Contact.BillingAddress it is null). Can I add this information somehow via DataLoadOptions? I tried LoadWith<Contact>(c => c.BillingAddress) but this doesn't work, I assume because of the fact that I'm calling the function instead of doing the whole query via LINQ.

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• C++ Templates: implicit conversion, no matching function for call to ctor

  - by noname

  template<class T> class test { public: test() { } test(T& e) { } }; int main() { test<double> d(4.3); return 0; } Compiled using g++ 4.4.1 with the following errors: g++ test.cpp -Wall -o test.exe test.cpp: In function 'int main()': test.cpp:18: error: no matching function for call to 'test<double>::test(double) ' test.cpp:9: note: candidates are: test<T>::test(T&) [with T = double] test.cpp:5: note: test<T>::test() [with T = double] test.cpp:3: note: test<double>::test(const test<double>&) make: *** [test.exe] Error 1 However, this works: double a=1.1; test<double> d(a); Why is this happing? Is it possible that g++ cannot implicitly convert literal expression 1.1 to double? Thanks.

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• How to detect an overflow in C++ ?

  - by Tim

  Hi, I just wonder if there is some convenient way to detect if overflow happens to any variable of any default data type used in a C++ program during runtime? By convenient, I mean no need to write code to follow each variable if it is in the range of its data type every time its value changes. Or if it is impossible to achieve this, how would you do? For example, float f1=FLT_MAX+1; cout << f1 << endl; doesn't give any error or warning in either compilation with "gcc -W -Wall" or running. Thanks and regards!

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• Agile development; on-line free tools!

  - by BT.

  We have been looking to implement Agile methodology within our geographically distributed development team, so i need suggestions on any free on-line application that you have used and find useful. Right now we are using paper cards and wall to manage this :), but we want to shift to an on-line version preferably free. I have used TargetProcess at my previous job! My Core requirements are: Business Analyst can add user stories We can assign, prioritize different user stories to developers. QA team can add test cases around different user stories. Project Manager can track the time of all the resources and can pull reports for upper management

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• jquery button click not firing asp.net button

  - by lloydphillips

  I've got a .net button that has an href attribute value set to 'javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$cp1$ucInvoiceSearch$btnSearch", "", true, "", "", false, true))'. I've got a textbox that when I press enter I want it to fire this event. Doing the 'Enter' event isn't an issue but I can't get the event on the href to fire using .click(). Here's my function so far: $("[id*='tbInvNo']").keyup(function(event){ var $btn = $(".pnl-invoice-search"); if(event.keyCode == 13) $btn.click(); }); I've got no idea how to get this to fire. Hope someone can help - jQuery and asp.net are driving me up the wall today! :(

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• Overriding Home button for a Car Home replacement app

  - by BigFwoosh

  I have been working on a replacement for the stock Car Home app for a bit, and I am completely stumped on how to override the Home button so that my app will be brought back to the foreground whenever the phone is docked. This is the way that Car Home works, so there must be a way. It seems that BroadcastReceivers won't work, because the intent that is broadcast whenever the Home button is pressed will still cause the default homescreen app to launch; I cannot prevent it. I can override the Home button from within my app, but that does me no good since this needs to work when the user is outside my app. Car Home also does not do anything weird like set itself as the default homescreen app while it's running (I checked the logcat to make sure). I've been really beating my head against the wall on this. Does anyone have any ideas, or can you at least point me in the right direction?

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• Advice on e-commerce logging strategy

  - by yalestar

  I recently inherited an e-commerce app (Java/Struts) that I'm porting to Rails. The thing is, we frequently have to do forensics on orders by poring through the log files, and with the old app's logs (log4j wall of text) it's pretty hard to make sense of the individual orders when several people are placing orders simultaneously. So I'm soliciting advice on a good strategy for logging of these orders, like maybe logging each individual order to its own MongoDB collection based on unique cart ID? Or maybe group them by IP address? Something different entirely? Essentially, what is the best approach for logging of an online store so that it's easy to backtrace each user's interaction with the site?

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• g++ and c++0x specification support

  - by SepiDev

  although it's been said that the support for c++0x new features in g++ are in experimental mode, many gcc developer claimed that you can use most of the new features in your codes and get the program to work. but when I try to compile this simple program it results in segmentation fault. Why? #include <thread> #include <iostream> void my_thread_func() { std::cout<<"hello"<<std::endl; } int main() { std::thread t(my_thread_func); t.join(); } g++ -std=c++0x -Wall -o run main.cc

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• Facebook tab application scripting

  - by zznq

  I have a web application that I am trying to port to Facebook. The app uses a few external javascript files. So initially I wanted to create an iframe Facebook application. However, it turns out that you cannot use iframes when creating a tab application(which is a requirement). By tab application I mean placing your app on the profile page next to the wall, info, photos, ect. tabs. Does any one know of a good tool to help convert my javascript to the FBJS scripting? Or better yet does anyone have a work around so that I can include my own javascript in this tabbed application? Thanks for the help.

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• openssl error wehn compiling Ruby from source

  - by Florian Salihovic

  Prelude: I don't want to use rvm. I installed ruby 2 with the following configuration on Mac OS X 10.8.5 ./configure --prefix=/usr/local \ --enable-pthread \ --with-readline-dir=/usr/local \ --enable-shared It is installed, version is printed correctly ... Now, when invoking gem install jekyll I get the following error: ERROR: Loading command: install (LoadError) cannot load such file -- openssl ERROR: While executing gem ... (NoMethodError) undefined method `invoke_with_build_args' for nil:NilClass I installed openssl into /usr/local but i'm really banging my head against the wall on how installing gems. It can't be that big of a deal right?

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• g++ How to get warning on ignoring function return value

  - by ArunSaha

  lint produces some warning like: foo.c XXX Warning 534: Ignoring return value of function bar() From the lint manual 534 Ignoring return value of function 'Symbol' (compare with Location) A function that returns a value is called just for side effects as, for example, in a statement by itself or the left-hand side of a comma operator. Try: (void) function(); to call a function and ignore its return value. See also the fvr, fvo and fdr flags in §5.5 "Flag Options". I want to get this warning, if there exists any, during compilation. Is there any option in gcc/g++ to achieve this? I had turned on -Wall but that apparently did not detect this.

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• How to code a batch file to copy and rename the most recently dated file?

  - by david.murtagh.keltie.com

  I'm trying to code a batch file to copy only the most recently dated file in a given folder to another directory on the local machine, and simultaneously rename it as it does. I've found a very similar question here http://stackoverflow.com/questions/97371/batch-script-to-copy-newest-file and have managed to cobble together the below code from other forums too, but have hit a brick wall as it only results in the batch file itself being copied to the destination folder. It doesn't matter to me where the batch file itself sits in order for this to run. The source folder is C:! BATCH and the destination folder is C:\DROP The code is below, apologies if this is a glaringly obvious answer but it's literally the first foray into coding batch files for me... Thanks! @echo off setLocal EnableDelayedExpansion pushd C:\! BATCH for /f "tokens=* delims= " %%G in ('dir/b/od') do (set newest=%%G) copy "!newest!" C:\DROP\ PAUSE

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• Checking for Magento login on external page

  - by LinuxGnut

  I'm hitting a wall here while trying to access items from Magento on an external page (same server, same domain, etc, etc). I want to see if the user is logged into Magento before showing them certain parts on the site. Keep in mind that this code exists outside of Magento. Mage::app("default"); Mage::getSingleton("core/session", array("name" = "frontend")); if (empty($session)) { $session = Mage::getSingleton("customer/session"); } if($session-isLoggedIn()) echo "hi"; $cart = Mage::helper('checkout/cart')-getCart()-getItemsCount(); echo $cart; $cart returns 0, where I definitely have products in my cart. isLoggedIn() also returns false. What am I doing wrong here? Is there an option in Magento that I need to turn on or off to be able to access this information outside of Magento?

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• Why doesn't GCC produce a warning when assigning a signed literal to an unsigned type?

  - by maerics

  Several questions on this website reveal pitfalls when mixing signed and unsigned types and most compilers seem to do a good job about generating warnings of this type. However, GCC doesn't seem to care when assigning a signed constant to an unsigned type! Consider the following program: /* foo.c */ #include <stdio.h> int main(void) { unsigned int x=20, y=-30; if (x > y) { printf("%d > %d\n", x, y); } else { printf("%d <= %d\n", x, y); } return 0; } Compilation with GCC 4.2.1 as below produces no output on the console: gcc -Werror -Wall -Wextra -pedantic foo.c -o foo The resulting executable generates the following output: $ ./foo 20 <= -30 Is there some reason that GCC doesn't generate any warning or error message when assigning the signed value -30 to the unsigned integer variable y?

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• Double pointer const-correctness warnings in C

  - by Michael Koval

  You can obviously cast a pointer to non-const data to a a pointer of the same type to const data: int *x = NULL; int const *y = x; Adding additional const qualifiers to match the additional indirection should logically work the same way: int * *x = NULL; int *const *y = x; /* okay */ int const *const *z = y; /* warning */ Compiling this with GCC or Clang with the -Wall flag, however, results in the following warning: test.c:4:23: warning: initializing 'int const *const *' with an expression of type 'int *const *' discards qualifiers in nested pointer types int const *const *z = y; /* warning */ ^ ~ Why does adding an additional const qualifier "discard qualifiers in nested pointer types"?

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• Packaging an application that uses the ImageMagick C API

  - by John Gardeniers

  I've created a little Windows app that uses the ImageMagick C API but have run into a bit of a brick wall. The app works fine and I'm ready to share it with a few others in our organisation but I can't find documentation on distributing such an app without installing ImageMagick on the target machine. Does anyone here have information, or a link to information, that details how to package this up for distribution? What DLLs are required and which one(s) need to registered with Windows? The target users will be on a mix of XP and Win7.

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• Are there any modern platforms with non-IEEE C/C++ float formats?

  - by Patrick Niedzielski

  Hi all, I am writing a video game, Humm and Strumm, which requires a network component in its game engine. I can deal with differences in endianness easily, but I have hit a wall in attempting to deal with possible float memory formats. I know that modern computers have all a standard integer format, but I have heard that they may not all use the IEEE standard for floating-point integers. Is this true? While certainly I could just output it as a character string into each packet, I would still have to convert to a "well-known format" of each client, regardless of the platform. The standard printf() and atod() would be inadequate. Please note, because this game is a Free/Open Source Software program that will run on GNU/Linux, *BSD, and Microsoft Windows, I cannot use any proprietary solutions, nor any single-platform solutions. Cheers, Patrick

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• appending SVG string to dom

  - by Wieringen

  I'm trying to append a string of svg elements to the dom. This is my setup. var oFragment = ''; for (var i = 0; i < 10; i++) { oFragment += '<g><path id="note-1" d="M 6,3 84,6 c 0,0 -6,76 14,91 L 58,97 19,89 c 0,0 -24,-5 -13,-86 z" style="fill:#ffc835;" /></g> '; } Here is what i tried. It gives the following error: "parseXML is not defined" var oSVG = document.getElementById("svg-wall").getSVGDocument(); var oNotes = oSVG.getElementById('notes'); oNotes.appendChild(parseXML(oFragment, document)); So my question is what am i doing wrong and is this even the best way to append a svg string to the dom?

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• css anchor div to foot of page

  - by foxed

  I may bounce my head off the wall shortly, I can't believe that something as stupid as this has utterly defeated me ... therefore I turn to you, Stack Overflow ... for guidance and enlightenment. Problem: Sit div at foot of page, 100% width, outside of any sort of wrapper. Proposed Solution: http://ryanfait.com/sticky-footer/ Implementation with content: http://www.weleasewodewick.com/redesign/index_content.html Implementation with no content: http://www.weleasewodewick.com/redesign/index.html with content - Good, works nicely no content = bad, footer sits exactly height of footer below the viewport. I really would appreciate your input into this, it's completely vexed me for the past hour. I wholly expect some form of ridicule :) Thanks! Foxed

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