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  • Checkbox vs Two Radio Buttons - Which one is more usable?

    - by Engram
    I'm currently working on some setting screens, most of which contain a 2 column form with a preference question on the left, and a form element on the right. The questions are things like: Can add/edit other users? Can delete clients? Obviously this setting is a binary setting and most UI "experts" would insist that a checkbox is the appropriate form element to use. However, when I mocked up the form with the checkboxes it looked unfriendly and it seemed hard to relate the state of the checkbox back to the question. I changed the form to use two radio buttons instead: Yes o No Personally I find this easier to process, as the options are actually answers to the question posed on the left. In terms of clicking it makes no difference to the user, it's a single click each time to change the setting. What do you think of this use of radio buttons? Is this better or worse than a checkbox and why?

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  • How do I reference my MainViewController from another class?

    - by todd412
    Hi, I am building an iPhone Utility app that uses UIImageView to display an animation. Within the MainViewController's viewDidLoad() method, I am creating an instance of a CustomClass, and then setting up the animations: - (void)viewDidLoad { [super viewDidLoad]; cc = [CustomClass new]; NSArray * imageArray = [[NSArray alloc] initWithObjects: [UIImage imageNamed:@"image-1-off.jpg"], [UIImage imageNamed:@"image-2-off.jpg"], [UIImage imageNamed:@"image-3-off.jpg"], [UIImage imageNamed:@"image-4-off.jpg"], nil]; offSequence = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; offSequence.animationImages = imageArray; offSequence.animationDuration = .8; offSequence.contentMode = UIViewContentModeBottomLeft; [self.view addSubview:offSequence]; [offSequence startAnimating]; } That works fine. However, I would like to be able to move all the above code that sets up the UIImageView into my CustomClass. The problem is in the second to last line: [self.view addSubview:offSequence]; I basically need to replace 'self' with a reference to the MainControllerView, so I can call addSubview from within my CustomClass. I tried creating an instance var of CustomClass called mvc and a setter method that takes a reference to the MainViewController as an argument as such: - (void) setMainViewController: (MainViewController *) the_mvc { mvc = the_mvc; } And then I called it within MainViewController like so: [cc setMainController:MainViewController:self]; But this yields all sorts of errors which I can post here, but it strikes me that I may be overcomplicating this. Is there an easier way to reference the MainViewController that instanatiated my CustomClass?

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  • OpenXML - using Excel sheet as template vs. a "real" Excel template

    - by marc_s
    Does anyone have any good answer what kind of difference there is between using some arbitrary pre-formatted Excel 2007 *.xlsx file as a template, loading it in my C# app, and filling up some of its cells with data using the Microsoft OpenXML SDK versus creating specific Excel templates (*.xltx) files and using those as basis for my "data filling" exercise Do I loose something when I don't use the Excel templates (*.xltx)? If so - what do I loose?

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  • Add xcode-select to PATH vs. Install Xcode Command Line Tools?

    - by MattDiPasquale
    Now with Xcode 4.5, is it OK to just add the following line to my ~/.bash_profile rather than installing the Xcode Command Line Tools? export PATH="$PATH:`xcode-select -print-path`/usr/bin:`xcode-select -print-path`/Toolchains/XcodeDefault.xctoolchain/usr/bin" Note: Xcode says the following about Command Line Tools: Before installing, note that from within Terminal you can use the XCRUN tool to launch compilers and other tools embedded within the Xcode application. Use the XCODE-SELECT tool to define which version of Xcode is active. Type "man xcrun" from within Terminal to find out more.

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  • What is better for a student programming in C++ to learn for writing GUI: C# vs QT?

    - by flashnik
    I'm a teacher(instructor) of CS in the university. The course is based on Cormen and Knuth and students program algorithms in C++. But sometimes it is good to show how an algorithm works or just a result of task through GUI. Also in my opinion it's very imporant to be able to write full programs. They will have courses concerning GUI but a three years, later, in fact, before graduatuion. I think that they should be able to write simple GUI applications earlier. So I want to teach them it. How do you think, what is more useful for them to learn: programming GUI with QT or writing GUI in C# and calling unmanaged C++ library?

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  • iOS 6&7: Storyboard, master detail ViewController when detailViewController is dynamic

    - by Cam
    I'm building an app for iPhone, I want to use storyboard in XCode to do a simple selection from a tableView (let's call it master table view controller with couple rows) then through navigation it goes to next page and shows a detail view for that selection. I have in my code a base class representing my detailViewController, and have 2-3 driver classes of this base class representing what I want to show in detail view controller in second page, can someone give me an idea how to set destination viewController (detailViewController) dynamically to one of my child class based on the selected row in master view controller using storyboard? Usually you assign a class to destination class in storyboard for your detail view controller with using segue, but since my destination class could be a different (child class) how you set this in storyboard? Thank you, Kam

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  • Pascal's repeat... until vs. C's do... while

    - by Bob
    In C there is a do while loop and pascal's (almost) equivalent is the repeat until loop, but there is a small difference between the two, while both structures will iterate at least once and check whether they need to do the loop again only in the end, in pascal you write the condition that need to met to terminate the loop (REPEAT UNTIL something) in C you write the condition that need to be met to continue the loop (DO WHILE something). Is there a reason why there is this difference or is it just an arbitrary decision?

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  • Shader vs Shader Material , papervision specific , general insight welcome.

    - by RadAdam
    hello overflow. I asked this question on the pv3d forum and not a single person could, or cared to answer it. Im relatively new to 3d so i apologize if this is common sense to some. I have a sphere , in which i am applying a CellMaterial to. Looks great. I noticed that in the papervision sdk , there is also a CellShader. Should I be using this in congruence with the CellMaterial ? Should it be one or the other ? Is shader , a deprecated practice to Shader Material ? My initial thoughts were that the shader applies to the whole scene , while materials can be applied uniquely to objects. The documentation seems to show otherwise. What benefit if any could be gained by using both a CellShader and a CellMaterial ? id really love to get some ambient inclusion in there some how.

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  • Can I get the original page source (vs current DOM) with phantomjs/casperjs?

    - by supercoco
    I am trying to get the original source for a particular web page. The page executes some scripts that modify the DOM as soon as it loads. I would like to get the source before any script or user changes any object in the document. With Chrome or Firefox (and probably most browsers) I can either look at the DOM (debug utility F12) or look at the original source (right-click, view source). The latter is what I want to accomplish. Is it possible to do this with phantomjs/casperjs? Before getting to the page I have to log in. This is working fine with casperjs. If I browse to the page and render the results I know I am on the right page. casper.thenOpen('http://'+customUrl, function(response) { this.page.render('example.png'); // *** Renders correct page (current DOM) *** console.log(this.page.content); // *** Gets current DOM *** casper.download('view-source:'+customUrl, 'b.html', 'GET'); // *** Blank page *** console.log(this.getHTML()); // *** Gets current DOM *** this.debugPage(); // *** Gets current DOM *** utils.dump(response); // *** No BODY *** casper.download('http://'+customUrl, 'a.html', 'GET'); // *** Not logged in ?! *** }); I've tried this.download(url, 'a.html') but it doesn't seem to share the same context since it returns HTML as if I was not logged in, even if I run with cookies casperjs test.casper.js --cookies-file=cookies.txt. I believe I should keep analyzing this option. I have also tried casper.open('view-source:url') instead of casper.open('http://url') but it seems it doesn't recognize the url since I just get a blank page. I have looked at the raw HTTP Response I get from the server with a utility I have and the body of this message (which is HTML) is what I need but when the page loads in the browser the DOM has already been modified. I tried: casper.thenOpen('http://'+url, function(response) { ... } But the response object only contains the headers and some other information but not the body. ¿Any ideas? Here is the full code: phantom.casperTest = true; phantom.cookiesEnabled = true; var utils = require('utils'); var casper = require('casper').create({ clientScripts: [], pageSettings: { loadImages: false, loadPlugins: false, javascriptEnabled: true, webSecurityEnabled: false }, logLevel: "error", verbose: true }); casper.userAgent('Mozilla/5.0 (Macintosh; Intel Mac OS X)'); casper.start('http://www.xxxxxxx.xxx/login'); casper.waitForSelector('input#login', function() { this.evaluate(function(customLogin, customPassword) { document.getElementById("login").value = customLogin; document.getElementById("password").value = customPassword; document.getElementById("button").click(); }, { "customLogin": customLogin, "customPassword": customPassword }); }, function() { console.log('Can't login.'); }, 15000 ); casper.waitForSelector('div#home', function() { console.log('Login successfull.'); }, function() { console.log('Login failed.'); }, 15000 ); casper.thenOpen('http://'+customUrl, function(response) { this.page.render('example.png'); // *** Renders correct page (current DOM) *** console.log(this.page.content); // *** Gets current DOM *** casper.download('view-source:'+customUrl, 'b.html', 'GET'); // *** Blank page *** console.log(this.getHTML()); // *** Gets current DOM *** this.debugPage(); // *** Gets current DOM *** utils.dump(response); // *** No BODY *** casper.download('http://'+customUrl, 'a.html', 'GET'); // *** Not logged in ?! *** });

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  • Counting entries in a list of dictionaries: for loop vs. list comprehension with map(itemgetter)

    - by Dennis Williamson
    In a Python program I'm writing I've compared using a for loop and increment variables versus list comprehension with map(itemgetter) and len() when counting entries in dictionaries which are in a list. It takes the same time using a each method. Am I doing something wrong or is there a better approach? Here is a greatly simplified and shortened data structure: list = [ {'key1': True, 'dontcare': False, 'ignoreme': False, 'key2': True, 'filenotfound': 'biscuits and gravy'}, {'key1': False, 'dontcare': False, 'ignoreme': False, 'key2': True, 'filenotfound': 'peaches and cream'}, {'key1': True, 'dontcare': False, 'ignoreme': False, 'key2': False, 'filenotfound': 'Abbott and Costello'}, {'key1': False, 'dontcare': False, 'ignoreme': True, 'key2': False, 'filenotfound': 'over and under'}, {'key1': True, 'dontcare': True, 'ignoreme': False, 'key2': True, 'filenotfound': 'Scotch and... well... neat, thanks'} ] Here is the for loop version: #!/usr/bin/env python # Python 2.6 # count the entries where key1 is True # keep a separate count for the subset that also have key2 True key1 = key2 = 0 for dictionary in list: if dictionary["key1"]: key1 += 1 if dictionary["key2"]: key2 += 1 print "Counts: key1: " + str(key1) + ", subset key2: " + str(key2) Output for the data above: Counts: key1: 3, subset key2: 2 Here is the other, perhaps more Pythonic, version: #!/usr/bin/env python # Python 2.6 # count the entries where key1 is True # keep a separate count for the subset that also have key2 True from operator import itemgetter KEY1 = 0 KEY2 = 1 getentries = itemgetter("key1", "key2") entries = map(getentries, list) key1 = len([x for x in entries if x[KEY1]]) key2 = len([x for x in entries if x[KEY1] and x[KEY2]]) print "Counts: key1: " + str(key1) + ", subset key2: " + str(key2) Output for the data above (same as before): Counts: key1: 3, subset key2: 2 I'm a tiny bit surprised these take the same amount of time. I wonder if there's something faster. I'm sure I'm overlooking something simple. One alternative I've considered is loading the data into a database and doing SQL queries, but the data doesn't need to persist and I'd have to profile the overhead of the data transfer, etc., and a database may not always be available. I have no control over the original form of the data. The code above is not going for style points.

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  • Why would this line throw exception for type initializer failed?

    - by Jaggu
    I had a class: public class Constant { public static string ConnString = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; } which would throw exception on LIVE: Type initialize failed for Constant ctor If I change the class to: public class Constant { public static string ConnString { get { return ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; } } } it works. I wasted 2 hours behind this but I still don't know why would this happen. Any ideas? Note: The 1st class used to work on DEV environment but not on LIVE. The 2nd class works on DEV and also on Production. I am using VS2010 on production and Asp.Net 4.0 Website project. I am totally amazed by this inconsistency to say the least! Edit: This class was in App_Code folder.

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  • different small js files per page VS. 1x site-wide js file?

    - by Haroldo
    Different pages of my site have different js needs (plugins mainly), some need a lightbox, some dont, some need a carousel, some dont etc. With regards to pageloading speed should i option 1 - reference each js file when it is needed: so one page might have: <script type="text/javascript" src="js/carousel/scrollable.js"></script> <script type="text/javascript" src="js/jquery.easydrag.js"></script> <script type="text/javascript" src="js/colorbox/jquery.colorbox-min.js"></script> and another have: <script type="text/javascript" src="st_wd_assets/js/carousel/scrollable.js"></script> <script type="text/javascript" src="st_wd_assets/js/typewatch.js"></script> option 2 - combine and compress into one site_wide.js file: so each page would reference: <script type="text/javascript" src="js/site_wide.js"></script> there would be unused selectors/event listeners though, how bad is this? I would include any plugin notes/accreditations at the top of the site_wide.js file

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  • Checkbox to Show and Hide only for the near DIV

    - by Holp
    Select all options... Then, when the user uncheck "B" and check it again, the "D" parents must be hidden. I have to do it without give then IDs. <html> <head> <title>Form</title> <style> * { font-family: Segoe UI, Verdana; font-size: 10pt; } #total { padding: 10px; position: fixed; top: 10px; left: 500px; width: 150px; height: 100px; } p { margin: 5px; } .grupo { padding: 5px 0 5px 0; } </style> <script src="jquery-1.4.2.min.js" type="text/javascript"></script> </head> <body> <div class="grupo"> <p class="pergunta">A) Lorem ipsum dolor sit amet, nulla nec tortor?</p> <p><label><input type="radio" name="P-1" value="R-1-1" />Sim</label></p> <p><label><input type="radio" name="P-1" value="R-1-2" />Não</label></p> </div> <div class="grupo"> <p class="pergunta"><label><input type="checkbox" name="P-2" value="R-2-3" />B) Donec libero risus, commodo vitae</label></p> <div class="dependente"> <div class="grupo"> <p class="pergunta">C) Lorem ipsum dolor sit amet, nulla nec tortor?</p> <p><label><input type="radio" name="P-3" value="R-3-1" />Morbi in orci</label></p> <p><label><input type="radio" name="P-3" value="R-3-2" />Nulla purus lacus, pulvinar vel</label></p> <p><label><input type="radio" name="P-3" value="R-3-3" />Aliquam ante</label></p> <p><label><input type="radio" name="P-3" value="R-3-4" />Suspendisse scelerisque dui nec velit</label></p> </div> <div class="grupo"> <p class="pergunta"><label><input type="checkbox" name="P-4" value="R-4-5" />D) Donec libero risus, commodo vitae</label></p> <div class="dependente"> <div class="grupo"> <p class="pergunta">E) Lorem ipsum dolor sit amet, nulla nec tortor?</p> <p><label><input type="radio" name="P-5" value="R-5-1" />Morbi in orci</label></p> <p><label><input type="radio" name="P-5" value="R-5-2" />Nulla purus lacus</label></p> </div> </div> </div> </div> </div> <div class="grupo"> <p class="pergunta">F) Lorem ipsum dolor sit amet, nulla nec tortor?</p> <p><label><input type="radio" name="P-6" value="R-6-1" />Morbi in orci</label></p> <p><label><input type="radio" name="P-6" value="R-6-2" />Nulla purus lacus, pulvinar vel</label></p> <p><label><input type="radio" name="P-6" value="R-6-3" />Aliquam ante</label></p> <p><label><input type="radio" name="P-6" value="R-6-4" />Suspendisse scelerisque dui nec velit</label></p> </div> <script type="text/javascript"> $('.dependente').hide(); $(':checkbox').click(function () { var checked = this.checked; $('.dependente:first',$(this).parents('div:first')).css('display',checked ? 'block':'none'); $('.dependente input',$(this).parents('div:first')).attr('checked', false).change(); }); </script> </body> </html>

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  • Visual Studio 2010 "Not enough storage is available to process this command"

    - by Daniel Perez
    I'm fighting with VS 2010 and this error that seems to be very common in previous versions, but it looks like not everyone is having it in the latest version. I've got VS 2010 SP1 and I'm getting this error quite often. The problem is that it's not even enough to restart VS in order to make it go away, I usually have to restart my pc, and i'm losing a lot of time doing this (it's quite frequent) I've got Windows 7 32bits (can't upgrade to 64 bits, the company doesn't allow it), and I can't do things like creating another solution (please don't reply this :) ) I've used the command to make devenv.exe LARGEADDRESSAWARE, but the error keeps on happening My virtual memory size is set to automatic, and the weird thing is that VS doesn't even take 2gb of ram, so I don't know if the error is really because it's lacking memory, or if it's some bug in the program any ideas, things to try, something?

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  • Implicit vs explicit getters/setters in AS3, which to use and why?

    - by James
    Since the advent of AS3 I have been working like this: private var loggy:String; public function getLoggy ():String { return loggy; } public function setLoggy ( loggy:String ):void { // checking to make sure loggy's new value is kosher etc... this.loggy = loggy; } and have avoided working like this: private var _loggy:String; public function get loggy ():String { return loggy; } public function set loggy ( loggy:String ):void { // checking to make sure loggy's new value is kosher etc... this.loggy = loggy; } I have avoided using AS3's implicit getters/setters partly so that I can just start typing "get.." and content assist will give me a list of all my getters, and likewise for my setters. I also dislike underscores in my code which turned me off the implicit route. Another reason is that I prefer the feel of this: whateverObject.setLoggy( "loggy's awesome new value!" ); to this: whateverObject.loggy = "loggy's awesome new value!"; I feel that the former better reflects what is actually happening in the code. I am calling functions, not setting values directly. After installing Flash Builder and the great new plugin SourceMate ( which helps to get some of the useful features that FDT is famous into FB ) I realized that when I use SourceMate's "generate getters and setters" feature it automatically sets my code up using the implicit route: private var _loggy:String; public function get loggy ():String { return loggy; } public function set loggy ( loggy:String ):void { // do whatever is needed to check to make sure loggy is an acceptable value this.loggy = loggy; } I figure that these SourceMate people must know what they are doing or they wouldn't be writing workflow enhancement plugins for coding in AS3, so now I am questioning my ways. So my question to you is: Can anyone give me a good reason why I should give up my explicit g/s ways, start using the implicit technique, and embrace those stinky little _underscores for my private vars? Or back me up in my reasons for doing things the way that I do?

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  • Experience with SVN vs. Team Foundation Server?

    - by bcwood
    A few months back my team switched our source control over to Subversion from Visual SourceSafe, and we haven't been happier. Recently I've been looking at Team Foundation Server, and at least on the surface, it seems very impressive. There is some great integration with Visual Studio, and lots of great tools for DBA's, testers, project managers, etc. The most obvious difference between these two products is price. It's hard to beat Subversion (free). Team Foundation Server is quite expensive, so the extra features would really have to kick Subversion in the pants. My question is: does anyone have practical experience with both? How do they compare, and is Team Foundation Server actually worth all the money?

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  • Jquery load DIV inside another DIV at same page

    - by Sergio
    HTML: <div class="someclass" rel="first">text 1</div> <div class="someclass" rel="second">text 2</div></div></div> <div class="info_ly">here is some text</div> <div class="first" > the first DIV </div> <div class="second" > the second DIV </div> CSS: .first{ display:none} .second{ display:none} Jquery: $(".someclass").click(function() { $(".info_ly").html($(this).attr('rel')); }); I want to call and load the "rel" DIV inside "info_ly" DIV. With this Jquery code I get only text "first" or "second" inside "info_ly" DIV. How can I load the DIV with the class "first" or DIV with the class "second" inside "info_ly" DIV?

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  • How to use data receive event in Socket class?

    - by affan
    I have wrote a simple client that use TcpClient in dotnet to communicate. In order to wait for data messages from server i use a Read() thread that use blocking Read() call on socket. When i receive something i have to generate various events. These event occur in the worker thread and thus you cannot update a UI from it directly. Invoke() can be use but for end developer its difficult as my SDK would be use by users who may not use UI at all or use Presentation Framework. Presentation framework have different way of handling this. Invoke() on our test app as Microstation Addin take a lot of time at the moment. Microstation is single threaded application and call invoke on its thread is not good as it is always busy doing drawing and other stuff message take too long to process. I want my events to generate in same thread as UI so user donot have to go through the Dispatcher or Invoke. Now i want to know how can i be notified by socket when data arrive? Is there a build in callback for that. I like winsock style receive event without use of separate read thread. I also do not want to use window timer to for polling for data. I found IOControlCode.AsyncIO flag in IOControl() function which help says Enable notification for when data is waiting to be received. This value is equal to the Winsock 2 FIOASYNC constant. I could not found any example on how to use it to get notification. If i am write in MFC/Winsock we have to create a window of size(0,0) which was just used for listening for the data receive event or other socket events. But i don't know how to do that in dotnet application.

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