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  • Flash: Correctly handling click-and-drag outside the browser?

    - by David Wolever
    What's the correct way to detect, from Flash, when someone has started a drag within the browser (eg, a MOUSE_DOWN event), dragged the mouse outside the browser window, released the button, then moved the mouse back over the browser? For example (assuming StackOverflow was a Flash application): I've tried the "obvious" thing, checking event.buttonDown in the MOUSE_MOVE handler, but even though the mouse button is up, event.buttonDown is true in step 2 (above). So, is there any other way to check the "real" status of the mouse button? Or any other way to handle this situation?

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  • Dynamic columns in C# rdlc report

    - by Mugume David
    Suppose I have a report that lists employees (as rows) with their respective taxes charged (in columns). It is possible for a new tax to come up. Since my rdlc report file is currently designed (from XML of-course) to statically generate the coulumns. A future shift in events will need me to alter the rdlc file and add in a new column. how can i do this dynamically. I intend to avoid opening the rdlc file and adding XML code.

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  • Why do .png backgrounds appear black on iPhone device but not simulator?

    - by David Rea
    I started with a .tiff file and used GraphicConverter to change it to a .png and set a transparency color. Worked fine in the simulator but when I pushed to the device the transparency color became black. Tested with a .png I downloaded from the net and that worked fine, so it seems to only happen with some files. Thus I suspect it has something to do with the way GraphicConverter writes the .pngs, but I don't know enough about file formats to debug it. Any ideas/suggestions? Ideally I'd like to programatically treat all .pngs because my app allowed dynamic loading of arbitrary files, so I can't verify the transparency beforehand.

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  • C++ is there a difference between assignment inside a pass by value and pass by reference function?

    - by Rémy DAVID
    Is there a difference between foo and bar: class A { Object __o; void foo(Object& o) { __o = o; } void bar(Object o) { __o = o; } } As I understand it, foo performs no copy operation on object o when it is called, and one copy operation for assignment. Bar performs one copy operation on object o when it is called and another one for assignment. So I can more or less say that foo uses 2 times less memory than bar (if o is big enough). Is that correct ? Is it possible that the compiler optimises the bar function to perform only one copy operation on o ? i.e. makes __o pointing on the local copy of argument o instead of creating a new copy?

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  • tomcat wont start up on linux machine

    - by David
    hi, im new to linux but after spending the day i have got linux running. installed java and tomcat. my goal is host my app with this linux box i've just set up. i know it all works fine from my windows based machine but it is my laptop so i'm planning this as my dedicated server. following many many forums i've now got tomcat 7 installed. however i cannot get it to start. changing to the tomcat directory and "./startup.sh" i get output Using CATALINA_BASE: /usr/local/tomcat Using CATALINA_HOME: /usr/local.tomcat Using CATALINA_TMPDIR: /usr/local/tomcat/temp Using JRE_HOME: usr/lib/jvm/java-6-sun/ Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local.tomcat/bin/c\tomcat-juli.jar thats the end of theoutput. however localhost:8080 is not up. and in the tomcat log file is the error "eval: 1: usr/lib/jvm/java-6-sun//bin/java: not found" hopfully there is some expert here who can help me with this problem. please note that im a novice when it comes to linux. thankyou oh and my version of linux is Ubuntu 10.04 LTS - the Lucid Lynx

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  • F# How to tokenise user input: separating numbers, units, words?

    - by David White
    I am fairly new to F#, but have spent the last few weeks reading reference materials. I wish to process a user-supplied input string, identifying and separating the constituent elements. For example, for this input: XYZ Hotel: 6 nights at 220EUR / night plus 17.5% tax the output should resemble something like a list of tuples: [ ("XYZ", Word); ("Hotel:", Word); ("6", Number); ("nights", Word); ("at", Operator); ("220", Number); ("EUR", CurrencyCode); ("/", Operator); ("night", Word); ("plus", Operator); ("17.5", Number); ("%", PerCent); ("tax", Word) ] Since I'm dealing with user input, it could be anything. Thus, expecting users to comply with a grammar is out of the question. I want to identify the numbers (could be integers, floats, negative...), the units of measure (optional, but could include SI or Imperial physical units, currency codes, counts such as "night/s" in my example), mathematical operators (as math symbols or as words including "at" "per", "of", "discount", etc), and all other words. I have the impression that I should use active pattern matching -- is that correct? -- but I'm not exactly sure how to start. Any pointers to appropriate reference material or similar examples would be great.

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  • C++ Template Class Constructor with Variable Arguments

    - by david
    Is it possible to create a template function that takes a variable number of arguments, for example, in this Vector< T, C class constructor: template < typename T, uint C > Vector< T, C >::Vector( T, ... ) { assert( C > 0 ); va_list arg_list; va_start( arg_list, C ); for( uint i = 0; i < C; i++ ) { m_data[ i ] = va_arg( arg_list, T ); } va_end( arg_list ); } This almost works, but if someone calls Vector< double, 3 ( 1, 1, 1 ), only the first argument has the correct value. I suspect that the first parameter is correct because it is cast to a double during the function call, and that the others are interpreted as ints and then the bits are stuffed into a double. Calling Vector< double, 3 ( 1.0, 1.0, 1.0 ) gives the desired results. Is there a preferred way to do something like this?

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  • Flex: Bottom-left align components?

    - by David Wolever
    As the title suggests, is there any way to bottom-left align components? An <HBox .../> nested in a <Canvas .../> doesn't work because the elements in the HBox are top-aligned instead of bottom aligned. For example, I'd like my components to be aligned like this: +-------------+ <-- container | components | | | V | | V +--+ | | +-+ | | | | +-+ +--+ | +-------------+

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  • Regex "or" Expression

    - by David
    This is probably a really basic question, but I can't find any answers. I need to match a string by either one or more spaces OR an equals sign. When I split this string: 9 x 13 = (8.9 x 13.4) (89 x 134) with ( +) I get: part 0: 9 x 13 = (8.9 x 13.4) part 1: (89 x 134) When I split it with (=) I get: part 0: 9 x 13 part 1: (8.9 x 13.4) (89 x 134) How can split by BOTH? Something like: (=)OR( +) Edit: This does not work(=)|( +) Test it here: http://myregexp.com/ under "split".

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  • Framework/tool for processing C++ unit tests with numerical output

    - by David Claridge
    Hi, I am working on a C++ application that uses computer vision techniques to identify various types of objects in a sequence of images. The (1000+) images have been hand-classified, so we have an XML file for each image containing a description of where the objects are actually located in the images. I would like to know if there is a testing framework that can understand/graph results from tests that are numeric, in this case some measure of the error in the program's classification of the images, rather than just pass/fail style unit tests. We would like to use something like CDash/CTest for running these automated tests, and viewing over time how improvements to the vision algorithms are causing the images to be more correctly classified. Does anyone know of a tool/framework that can do this?

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  • Losing jQuery functionality after postback

    - by David Lozzi
    I have seen a TON of people reporting this issue online, but no actual solutions. I'm not using AJAX or updatepanels, just a dropdown that posts back on selected index change. My HTML is <div id="myList"> <table id="ctl00_PlaceHolderMain_dlFields" cellspacing="0" border="0" style="border-collapse:collapse;"> <tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl00_lblDestinationField">Body</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl00$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl00_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl00$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl00_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl01_lblDestinationField">Expires</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl01$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl01_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl01$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl01_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl02_lblDestinationField">Title</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl02$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl02_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl02$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl02_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr> </table></div> The above Div tag is static, and the table is generated from a DataList object. On postback the datalist reloads using a new dataset, for example <div id="myList"> <table id="ctl00_PlaceHolderMain_dlFields" cellspacing="0" border="0" style="border-collapse:collapse;"> <tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl00_lblDestinationField">Notes</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl00$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl00_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl00$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl00_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr><tr> <td> <tr> <td class="ms-formlabel" style="width: 175px; padding-left: 10px"> <span id="ctl00_PlaceHolderMain_dlFields_ctl01_lblDestinationField">URL</span> </td> <td class="ms-formbody" style="width: 485px"> <input name="ctl00$PlaceHolderMain$dlFields$ctl01$txtSource" type="text" id="ctl00_PlaceHolderMain_dlFields_ctl01_txtSource" class="ms-input" style="width:230px" /> <select name="ctl00$PlaceHolderMain$dlFields$ctl01$ddlSourceFields" id="ctl00_PlaceHolderMain_dlFields_ctl01_ddlSourceFields" class="ms-input"> <option value="Some Field Name 1">Some Field Name 1</option> <option value="Some Field Name 2">Some Field Name 2</option> <option value="Some Field Name 3">Some Field Name 3</option> <option value="Some Field Name 4">Some Field Name 4</option> </select> <a href="#" id="appendSelect">append</a> </td> </tr> </td> </tr> </table></div> After the postback and the datalist is reloaded, my JQuery doesn't work anymore. No errors, nothing. I don't see any actual changes in the objects in the HTML that should cause this. How do I fix this? Any workarounds or bandaides I can apply? My JQuery is below <script type='text/javascript'> $(document).ready(function () { $('#myList a').live("click", function () { var $selectValue = $(this).siblings('select').val(); var $thatInput = $(this).siblings('input'); var val = $thatInput.val() + ' |[' + $selectValue + ']|'; $thatInput.val(jQuery.trim(val)); }) }); </script> Thanks!!

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  • Use multiple css files or a single file organised by comments

    - by David
    Hi, what is regarded as the best approach to organising css. At the moment I am using a single link in the head of my xhtml documents as follows: <link rel="stylesheet" type="text/css" href="style/imports.css" /> In this file im importing several different css files i.e. reset.css, structure.css, skin.css I know there is an overhead in doing this as each requires an extra trip to the server but it makes things much more logical and organised in my opinion. Does anyone have an opinion on how best to organise their css. - Would it be better to put all these seperate css funcions into one single file? Also, is it best practice to minify css.

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  • Pass arguments to a parameter class object

    - by David R
    This is undoubtedly a simple question. I used to do this before, but it's been around 10 years since I worked in C++ so I can't remember properly and I can't get a simple constructor call working. The idea is that instead of parsing the args in main, main would create an object specifically designed to parse the arguments and return them as required. So: Parameters params = new Parameters(argc, argv) then I can call things like params.getfile() Only problem is I'm getting a complier error in Visual Studio 2008 and I'm sure this is simple, but I think my mind is just too rusty. What I've got so far is really basic: In the main: #include "stdafx.h" #include "Parameters.h" int _tmain(int argc, _TCHAR* argv[]) { Parameters params = new Parameters(argc, argv); return 0; } Then in the Parameters header: #pragma once class Parameters { public: Parameters(int, _TCHAR*[]); ~Parameters(void); }; Finally in the Parameters class: include "Stdafx.h" #include "Parameters.h" Parameters::Parameters(int argc, _TCHAR* argv[]) { } Parameters::~Parameters(void) { } I would appreciate if anyone could see where my ageing mind has missed the really obvious. Thanks in advance.

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  • Getting specific values with regex

    - by David
    I need to knowingly isolate each row of the vCard and get its value. For instance, I want to get "5555" from X-CUSTOMFIELD. So far, my thoughts are: "X-CUSTOMFIELD;\d+" I have been looking at some tutorials and I am a little confused with what function to use? What would my regex above return? Would it give me the whole line or just the numerical part (5555)? I was thinking I i get the whole row, I can use substring to get the digits? BEGIN:VCARD VERSION:2.1 N:Last;First; FN:First Last TEL;HOME;VOICE:111111 TEL;MOBILE;VOICE:222222 X-CUSTOMFIELD;5555 END:VCARD

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  • Is there still a place for XML in the future?

    - by David Neale
    Now that many people seem to be moving towards JSON for web communication I am wondering about why XML should continue to be used. I appreciate that XML has many years on JSON, during which time it has been widely adopted. However, the fact that it is so well-adopted appears to be the one decisive reason why it should continue to be used. Is there a good reason why XML should not gradually be phased out in favour of JSON?

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  • Entity Framework projections

    - by David McClelland
    We are investigating the Entity Framework to see if it will meet our particular needs. Here is the scenario I am interested in: I have a large table (let's call it VeryWideRecord) which has many columns, and it has a corresponding business object (it's also called VeryWideRecord). I would like to be able to query my database for a VeryWideRecord business object, but only have values for certain columns returned by the underlying SQL. Can I do this with the Entity Framework? I am uncertain as to whether this could be done with the Entity Framework's table splitting feature, because the application needs to be able (at runtime) to change the columns that are requested. The reason for this is that we are trying to minimize the amount of information that is going across the wire. I see how this could be done using NHibernate (example), but how can I do this with the Entity Framework?

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  • Create instance of generic type in Java?

    - by David Citron
    Is it possible to create an instance of a generic type in Java? I'm thinking based on what I've seen that the answer is "no" (due to type erasure), but I'd be interested if anyone can see something I'm missing: class SomeContainer<E> { E createContents() { return what??? } } EDIT: It turns out that Super Type Tokens could be used to resolve my issue, but it requires a lot of reflection-based code, as some of the answers below have indicated. I'll leave this open for a little while to see if anyone comes up with anything dramatically different than Ian Robertson's Artima Article.

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  • Visual Studio 2012 won't start

    - by David Aleu
    I installed VS2012 Premium from our MSDN subscription and it was working fine the first couple of days but then I installed a few extensions I can't now start VS2012 and it gives the error: Faulting application name: devenv.exe, version: 11.0.50727.1, time stamp: 0x5011ecaa Faulting module name: ntdll.dll, version: 6.1.7601.17725, time stamp: 0x4ec49b8f Exception code: 0xc0000374 Fault offset: 0x000ce6c3 Faulting process id: 0xee8 Faulting application start time: 0x01cd89bb777fc1dd Faulting application path: C:\Program Files (x86)\Microsoft Visual Studio 11.0\Common7\IDE\devenv.exe Faulting module path: C:\Windows\SysWOW64\ntdll.dll I'm running it on Windows 7 64 bit. I've tried to repair, uninstall and install again and nothing. I tried to restore to a previous restore system point but nothing. The extensions I installed I can remember: VS10x Code Map VSCommands Visual SVN Nuget manager (all the above my colleagues have it too and it works fine for them) and: Web Essentials Visual Studio Color Theme Editor SlowCheetah Mobile Ready HTML5 Questions are: Anyone else has had this problem? Is there a way I can uninstall extensions from a command line or software? (I removed the extensions folder but that doesn't do anything) Can I repair the "C:\Windows\SysWOW64\ntdll.dll"? Is it really a problem with this dll? I haven't been able to find any similar issue in other versions and because VS2012 is new doesn't seem to be much information either.

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  • How do I suppress this output?

    - by David
    I have a code chunk in an R Markdown file. ```{r} library(UsingR) ``` Using knitHTML to compile causes the following output, which never happened before I updated to the latest versions of R and RStudio: ## Loading required package: MASS ## Loading required package: HistData ## Loading required package: Hmisc ## Loading required package: grid ## Loading required package: lattice ## Loading required package: survival ## Loading required package: splines ## Loading required package: Formula ## ## Attaching package: 'Hmisc' ## ## The following objects are masked from 'package:base': ## ## format.pval, round.POSIXt, trunc.POSIXt, units ## ## Loading required package: aplpack ## Loading required package: tcltk ## Loading required package: quantreg ## Loading required package: SparseM ## ## Attaching package: 'SparseM' ## ## The following object is masked from 'package:base': ## ## backsolve ## ## ## Attaching package: 'quantreg' ## ## The following object is masked from 'package:Hmisc': ## ## latex ## ## The following object is masked from 'package:survival': ## ## untangle.specials ## ## ## Attaching package: 'UsingR' ## ## The following object is masked from 'package:survival': ## ## cancer How can I suppress this output? Note: echo=FALSE did not work.

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  • How to store array of NSManagedObjects in an NSManagedObject

    - by David Tay
    I am loading my app with a property list of data from a web site. This property list file contains an NSArray of NSDictionaries which itself contains an NSArray of NSDictionaries. Basically, I'm trying to load a tableView of restaurant menu categories each of which contains menu items. My property list file is fine. I am able to load the file and loop through the nodes structure creating NSEntityDescriptions and am able to save to Core Data. Everything works fine and expectedly except that in my menu category managed object, I have an NSArray of menu items for that category. Later on, when I fetch the categories, the pointers to the menu items in a category is lost and I get all the menu items. Am I suppose to be using predicates or does Core Data keep track of my object graph for me? Can anyone look at how I am loading Core Data and point out the flaw in my logic? I'm pretty good with either SQL and OOP by themselves, but am a little bewildered by ORM. I thought that I should just be able to use aggregation in my managed objects and that the framework would keep track of the pointers for me, but apparently not. NSError *error; NSURL *url = [NSURL URLWithString:@"http://foo.com"]; NSArray *categories = [[NSArray alloc] initWithContentsOfURL:url]; NSMutableArray *menuCategories = [[NSMutableArray alloc] init]; for (int i=0; i<[categories count]; i++){ MenuCategory *menuCategory = [NSEntityDescription insertNewObjectForEntityForName:@"MenuCategory" inManagedObjectContext:[self managedObjectContext]]; NSDictionary *category = [categories objectAtIndex:i]; menuCategory.name = [category objectForKey:@"name"]; NSArray *items = [category objectForKey:@"items"]; NSMutableArray *menuItems = [[NSMutableArray alloc] init]; for (int j=0; j<[items count]; j++){ MenuItem *menuItem = [NSEntityDescription insertNewObjectForEntityForName:@"MenuItem" inManagedObjectContext:[self managedObjectContext]]; NSDictionary *item = [items objectAtIndex:j]; menuItem.name = [item objectForKey:@"name"]; menuItem.price = [item objectForKey:@"price"]; menuItem.image = [item objectForKey:@"image"]; menuItem.details = [item objectForKey:@"details"]; [menuItems addObject:menuItem]; } [menuCategory setValue:menuItems forKey:@"menuItems"]; [menuCategories addObject:menuCategory]; [menuItems release]; } if (![[self managedObjectContext] save:&error]) { NSLog(@"An error occurred: %@", [error localizedDescription]); }

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