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  • is there an equivalent to a "Focus Listener" in Objective-C or iPhone SDK? (Coming from Java)

    - by MarcZero
    Hello. I am a student programmer who has taken up Objective-C on my free time as my college doesn't teach it. We have only used Java and basic C so far. I am in the middle of making a program for the iPod and was wondering if there was any type of way to call a method in a class similar to the way a Focus Listener does in Java? I have a view that I would like to call a refresh method (to update the newly inputted titles of buttons from another view) when the view is put at the top and visible again. Is this too easy or is there a more methodical way of doing that? I have tried to just call the method from the other view class but it does not seem to work (says the other class is either undefined or may not accept the method call and crashes on execution). Any insight would be appreciated. Thank you for your time.

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  • Is it possible to have variable find conditions for both the key and value?

    - by DarrenD
    I'm trying to pass in both the field and the value in a find call: @employee = Employee.find(:all, :conditions => [ '? = ?', params[:key], params[:value].to_i) The output is SELECT * FROM `employees` WHERE ('is_manager' = 1) Which returns no results, however when I try this directly in mysqsl using the same call without the '' around is_manager, it works fine. How do I convert my params[:key] value to a symbol so that the resulting SQL call looks like: SELECT * FROM `employees` WHERE (is_manager = 1) Thanks, D

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  • Javascript: adding methods using prototype descriptor

    - by LDK
    Sorter.prototype.init_bubblesort = function(){ console.log(this.rect_array); this.end = this.rect_array.length; this.bubblesort(); } Sorter.prototype.init = function(array,sort_type){ this.rect_array = array; this.init_bubblesort(); } The code above works as expected, but when I change the init function to: Sorter.prototype.init = function(array,sort_type){ var sort_types = {'bubblesort':this.init_bubblesort, 'quicksort':this.init_quicksort, 'liamsort':this.init_liamsort}; this.rect_array = array; sort_types[sort_type](); } the init_bubblesort function results in an error saying this.rect_array is undefined. I'm trying to wrap my head around why init_bubblesort no longer as access to it's instance's variables.

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  • How can i pass nothing or a blank cell to an Optional argument in VBA?

    - by user2985990
    I am trying to set up a function so that whether I pass a blank cell or do not even select a cell for the argument it returns the function I am looking for. Here is my code: Function FinancialsAge(FirstBirthday As Date, BeginningDate As Date, Optional Second Birthday As Variant) As String If IsMissing(SecondBirthday) = True Or SecondBirthday = vbNullString Then FinancialsAge = Year(BeginningDate - FirstBirthday) - 1900 ElseIf SecondBirthday Then FinancialsAge = (Year(BeginningDate - FirstBirthday) - 1900) & "/" & (Year(BeginningDate - SecondBirthday) - 1900) End If End Function This code works fine as long as I select a blank cell for the third argument but when I leave the third argument out I get a "#Value!" error in the cell. Anyway to do this in Excel VBA so that the function works under both circumstances? Thanks,

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  • JQuery code problem?

    - by SLAPme
    New to JQuery, I added the following JQuery code below and moved it around in my code and now it won't work I forgot what I did, can someone fix my code by placing the below code in its correct place thanks. $('a').click(function () { $('#changes-saved').remove(); }); return false; // prevent normal submit }); JQuery code. $(function() { $('#changes-saved').hide(); $('.save-button').click(function() { $.post($('#contact-form').attr('action'), $('#contact-form').serialize(), function(html) { $('div.contact-info-form').html(html); $('#changes-saved').append('Changes saved!').show().pause(1000).hide(); }); return false; // prevent normal submit }); $('a').click(function () { $('#changes-saved').remove(); }); return false; // prevent normal submit }); });

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  • jQuery link nudge and color transform

    - by DaveKingsnorth
    Hey everyone, I have achieved the effect described in the title using the following code: $(document).ready(function(){ $('.button').mousedown(function() { $(this).animate({ 'top': '3px' }, 70); }); $('.button').mouseup(function() { $(this).animate({ 'top': '0px' }, 70); }); $('.button').hover(function() { $(this).stop().animate({ color: '#fff', backgroundColor: '#000' }, 250); }); $('.button').mouseout(function() { $(this).stop().animate({ color: '#000', backgroundColor: '#fff' }, 250); }); }); I am pretty sure that that this code can be reduced significantly, can anyone help me out? Please note that I want the button to animate when the mouse is clicked and not return to it's original position until the mouse is released. Cheers

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  • How to strip debug code during compile time in C++?

    - by juvenis
    Say I have a C++ function debugPrint(int foo). How can I most conveniently strip that from release builds? I do not want to surround every call to debugPrint with #ifdefs as it would be really time consuming. On the other hand, I want to be 100% sure that the compiler strips all the calls to that function, and the function itself from release builds. The stripping should happen also, if it's called with a parameter that results from a function call. E.g., debugPrint(getFoo());. In that case I want also the getFoo() call to be stripped. I understand that function inlining could be an option, but inlining is not guaranteed to be supported.

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  • jquery animate() problem

    - by meo
    $('#somediv').stop(false, true).animate({marginLeft: '-=' + e.width() + 'px'}, options.speed, function(){ options.onNewSlide() }) e.with() returns 640 opctions.speed contains 800 options.onNewSlide() contains a a custom callback function It works fine in firefox. But i debugged it with jquery.lint because it was throwing some random error in IE. lint tells me: When I called animate(...) with your args, an error was thrown! TypeError: c.speed is not a function { message="c.speed is not a function", more...} You passed: [Object { marginLeft="-=640px"}, 800, function()] and it indicates me the line i have posted. I have checked the jquery doc, but my syntax seams ok. Do you know what i am doing wrong?

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  • jQuery does not execute on dynamically loaded content,, even on a click events.

    - by sxv
    I have two document.ready functions. The first loads content into div#header. The second one performs a hide function and then a toggle function on the newly loaded content. I am not sure if this is a queueing issue or something, but not even the alert() below is executed when I click the loaded content. Thanks. <script type="text/javascript"> $(document).ready(function() { $("#header").load("/documents/collegeradioheader.txt"); }); </script> <script type="text/javascript"> $(document).ready(function() { $(".hideme").hide(); $(".slick-toggle").click(function() { alert('hi'); $(this).parent().next('div').slideToggle('fast'); .siblings('div:visible').slideUp('fast'); }); }); </script>

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  • Calling a Factory in AngularJS

    - by Kohjah Breese
    How do you call a factory? As defined below. angular.module('fb.services', []).factory('getQueryString', function () { return { call: function () { var result = {}, queryString = qs.substring(1), re = /([^&=]+)=([^&]*)/g, m; while (m = re.exec(queryString)) result[decodeURIComponent(m[1])] = decodeURIComponent(m[2]); return result; } } }); alert(getQueryString.call('this=that&me=you'));

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  • Problem using VideoView in Android

    - by user443141
    Hi, I am using VideoView in Android for displaying streaming videos. While playing the videos if a user receives & disconnects the call , the video starts playing from beginning instead of the behaviour which should be that after the call disconnection , the video should start playing from the same place when the call was received. Kindly provide your suggestions/sample code if you have already implemented the same. Warm Regards, CB

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  • How to reference filtered ng-repeat items from a controller in AngularJS

    - by ParkerDigital
    I have some JSON data that is rendered out via the ng-repeat directive, and the results are then filtered via some checkboxes/drop-downs, and some custom filter functions in my controller. I now want to add a function to my controller that is triggered by an 'ng-change' on some of the checkboxes, that can reference the current list of items in my 'ng-repeat'. I realise I can reference these values from a custom filter, for example $scope.filterProvider = function(item), but this function is then called for each and every item in the ng-repeat, which isn't what I want - I want the function to just be called each time a checkbox is checked/unchecked, and I need that function to be able to reference the items in my ng-repeat...does that make sense to anyone?! And if so, does anyone know how I can do that? Thanks :-)

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  • How to use strtok in C properly so there is no memory leak?

    - by user246392
    I am somewhat confused by what happens when you call strtok on a char pointer in C. I know that it modifies the contents of the string, so if I call strtok on a variable named 'line', its content will change. Assume I follow the bellow approach: void function myFunc(char* line) { // get a pointer to the original memory block char* garbageLine = line; // Do some work // Call strtok on 'line' multiple times until it returns NULL // Do more work free(garbageLine); } Further assume that 'line' is malloced before it is passed to myFunc. Am I supposed to free the original string after using strtok or does it do the job for us? Also, what happens if 'line' is not malloced and I attempt to use the function above? Is it safer to do the following instead? (Assume the programmer won't call free if he knows the line is not malloced) Invocation char* garbageLine = line; myFunc(line); free(garbageLine); Function definition void function myFunc(char* line) { // Do some work // Call strtok on 'line' multiple times until it returns NULL // Do more work }

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  • rails named routes + controller as parameter

    - by user350785
    Hi, is it possible to have the controller value in a rails named route as a parameter, which I can pass at runtime to direct the call to the proper controller? e.g. map.ride 'ride' ,:controller = {some-way-of-specifying-a-parameter}, :action = 'ride' then at runtime, I want to pass the controller name to which this call should be going. My actions are doing different things depending to which controller the call gets sent. thanks

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  • conditional beginReceive

    - by sbenderli
    I am writing a client program that uses Sockets. I would like the client to receive asyncronously UNLESS it is expecting a response, in which case I would like to receive syncronously. My current problem is that because I have to make a call to socket.BeginReceive which waits until there's data on the buffer, the async call always happens prior to the sync call.. How could I temporarily stop BeginReceive from executing? Is there a way to call EndReceive and then once I am done receiving syncronously, I can continue to receive asnycronously?

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  • jquery autocomplete get selected item text

    - by rlee923
    I am wondering how to grab the selected item's text value on jquery autocomplete. I have initialised jquery as following : $(document).ready(function (){ $("input#autocomplete").autocomplete({ source: postcodelist, select: function (event, ui) { AutoCompleteSelectHandler(event, ui) } }); }); And I have created a function function AutoCompleteSelectHandler(event, ui) { }. Inside this function I want to some extra handling to feed data into correct textboxes but I can't figure out how to grab the text value of the selected item. I did google a bit and tried examples but I can't seem to get it working. Any help will be much appreciated. Thanks a lot advance.

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  • Can't get jQuery ajax work

    - by yozloy
    I'm new to jQuery, and it really cool, but I can't get the basic ajax work, there's no error in the console ,so I don't know where goes wrong: getJSON function version: $(document).ready(function(){ $.getJSON('http://pollview:8888/js/example.json', function(data){ for(var element in data){ console.log(data[element]); } }); }); then the basic ajax version: $(document).ready(function(){ $.ajax({ url: 'http://pollview:8888/js/example.json' }).done(function(data){ alert('successful'); }); }); I get me stuck, any idea?

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  • Rotate on hover using Jquery

    - by Ian34
    I can't figure out how to set up a jquery rotate function that would only rotate on hover. Here is the code that I am using: $('div.settingsButton').hover(function() { var angle = 0; setInterval(function() { angle += 4; $(this).rotate(angle); }, 50); }, function() { var angle = 0; setInterval(function() { angle = 0; $(this).rotate(angle); }, 50); }); The rotate is a plugin found here: http://code.google.com/p/jqueryrotate/

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  • How can I start a new glutMainLoop() after exiting one?

    - by angaran
    I've written a PERL script using OpenGL. It calls glutMainLoop() to let the user view some stuff, then the user closes the window but I want to let him continue using the script and reopening a new window and seeing some other stuff. Is that possible? I've found that it is possible to execute this instruction: glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE,GLUT_ACTION_GLUTMAINLOOP_RETURNS); to return to the code after the window is closed. But then if I call again a glut* function it tells me that I can't call it without calling glutInit and if I call glutInit it tells me that I can't just call it again! Is there some trick?

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  • Why isn't this working - using :not() with an event handler

    - by james emanon
    I seem to have another issue that I am not conquering. Real simple premise. I have a mousedown event, and basically IF one particular element on the page is clicked, I want nothing to happen, else I want hide() some div. $(function(){ $("document :not(#_ignorelement)").mousedown(function(event){ if($('#_hidethiselement').length){ $('#_hidethiselement').hide(); } }) }) That is not working at all. I also tried the following: $(document).not($("#_ignorelement")).mousedown(function(event){ $(document).not("_ignorelement").mousedown(function(event){ IF I can solve that, curious how I would actually have ":not" encompass the parent div, like so: $().not("_ignoreelement").parent().closest('div').mousedown(function Because the element "_ignorelement" is an anchor tag that is in a div. Wonder how I can use the parent div perhaps, instead of the anchor tag. Anyways, any help would be appreciated.

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