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  • Beginner having a problem with classes

    - by David
    I'm working through O'Reilly's "Learning Python" and having a problem with classes. I think I understand the concept, but in practice have stumbled upon this problem. Fron page 88-89: >>> class Worker: def __innit__(self, name, pay): self.name=name self.pay=pay def lastName(self): return self.name.split()[-1] def giveRaise(self, percent): self.pay*=(1.0+percent) Then the book says "Calling the class like a function generates instances of a new type ...etc" and gives this example. bob = Worker('Bob Smith', 50000) This gives me this error: TypeError: this constructor takes no arguments. And then I start muttering profanities. So what am I doing wrong here? Thanks for the help.

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  • Access Flash Symbol Via Code from an .as Class

    - by David
    Hi, I've got a movie clip symbol in my .fla file that I need to reference in an .as file which is in a subfolder in the project. I select the symbol in the library and edit its properties. Its name is bubble; I Export for ActionScript and Export in frame 1. I give it a class name of Bubble. Now I need to go to my .as class, called SomeClass.as There, I need to reference the symbol, because I want to move it from within related code in that .as file. But if I try bubble.x I get an error. If I try var myBubble:Bubble = new Bubble(); I get 'Access of undefined property myBubble'. I was told that I might try 'importing the document class' but how do you import a class which is in the root directory of your app from within a class that's in a subfolder? (Don't know if this would provide the solution anyway)... Tanks.

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  • iPhone: Strange Movement of Two UIImageView "Sprites"

    - by David Pollak
    I have two UIImageViews moving like sprites on a superview. Each imageview moves properly by itself but when I put both imageviews on the superview at the same time, their individual movement becomes strangely restricted to two different areas of the screen. They will not touch even programmed to the same coordinates. This is my movement code for the first imageView: - (void)viewDidLoad { [super viewDidLoad]; pos = CGPointMake(14.0, 7.0); [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(onTimer) userInfo:nil repeats:YES]; } - (void) onTimer { pallone.center = CGPointMake(pallone.center.x+pos.x, pallone.center.y+pos.y); if(pallone.center.x > 320 || pallone.center.x < 0) pos.x = -pos.x; if(pallone.center.y > 480 || pallone.center.y < 0) pos.y = -pos.y; } and for the second imageview: - (IBAction)spara{ cos = CGPointMake(8.0, 4.0); [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(inTimer) userInfo:nil repeats:YES]; } - (void)inTimer{ bomba.center = CGPointMake(bomba.center.x+pos.x, bomba.center.y+pos.y); if(bomba.center.x > 50 || bomba.center.x < 0) pos.x = -pos.x; if(bomba.center.y > 480 || bomba.center.y < 0) pos.y = -pos.y; } Why causes this strange behavior? Thanks for your help. I am a newbie.

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  • IEnumerable and IEnumerator in the same class, bad idea?

    - by David Rutten
    Is this a bad idea? Private Class GH_DataStructureEnumerator(Of Q As Types.IGH_Goo) Implements IEnumerable(Of Q) Implements IEnumerator(Of Q) .... .... 'Current, MoveNext, Reset etc.' .... .... Public Function GetEnumerator_Generic() As IEnumerator(Of Q) _ Implements IEnumerable(Of Q).GetEnumerator Return Me End Function End Class This class is only visible as an IEnumerable(Of T) readonly property, and it saves me an additional class that wraps IEnumerator(Of T). But somehow it just seems wrong. Is there a better way?

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  • Dynamically add a new row as Add in UITableView in edit mode?

    - by David.Chu.ca
    I have a table view with 0 or n rows of data from datastore. I added a customized Edit button on the right of the view's navigation bar. By default, when the edit button is clicked, in the action event, I set the view as edit mode: [self.tableView setEditing:YES animated:YES]; I would like to add a row at the end of the table view with Add button as an accessory on the left when the table view is in edit mode. And the "Add" row will not be displayed when the view is not in edit mode. This is very similar to the case of iPhon'e Contacts application when a contact is in edit mode. I am not sure if I need to add a row dynamically, and how if so? An alternative way I guess is to add more row when tableView:numberOfRowsInSection: is called? If later is the case, I have to make it hidden when the view is not in edit mode and visible when the view is in edit.

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  • Event handling for keyboard strokes

    - by david
    Hey, I'm trying to get familiar with the whole keyboard event detection thing. Here's my sample code. <fx:Script> <![CDATA[ import flash.events.KeyboardEvent; import mx.controls.Alert; private function init():void{ addEventListener(KeyboardEvent.KEY_DOWN,reportKeyDown); } private function reportKeyDown(event:KeyboardEvent):void { Alert.show("a key was pressed"); } ]]> </fx:Script> As you can see, I'm at stage 0 of playing around with it, but it won't work. Anyone has any idea what I should be doing instead? Thanks

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  • What adapter to use for ExpandableListView with non-TextView views?

    - by David
    I have an ExpandableListView in which I'd like to have controls other than TextView. Apparently, SimpleExandableListViewAdapter assumes all the controls are TextViews. A cast exception is generated if they are not. What is the recommended solution? Options I can think of include: - Use some other included adapter. But I can't tell if they all have the same assumption. - Create my own adapter. Is there a doc which describes the contract, ie the sequence of method calls an adapter will encounter? I expected the existing adapters to require the views to conform to some interface to allow any conforming view to be used, rather than hardcode to textview and limit where they can be used.

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  • Creating A Single Threaded Server with AnyEvent (Perl)

    - by David Williams
    I'm working on creating a local service to listen on localhost and provide a basic call and response type interface. What I'd like to start with is a baby server that you can connect to over telnet and echoes what it receives. I've heard AnyEvent is great for this, but the documentation for AnyEvent::Socket does not give a very good example how to do this. I'd like to build this with AnyEvent, AnyEvent::Socket and AnyEvent::Handle. Right now the little server code looks like this: #!/usr/bin/env perl use AnyEvent; use AnyEvent::Handle; use AnyEvent::Socket; my $cv = AnyEvent->condvar; my $host = '127.0.0.1'; my $port = 44244; tcp_server($host, $port, sub { my($fh) = @_; my $cv = AnyEvent->condvar; my $handle; $handle = AnyEvent::Handle->new( fh => $fh, poll => "r", on_read => sub { my($self) = @_; print "Received: " . $self->rbuf . "\n"; $cv->send; } ); $cv->recv; }); print "Listening on $host\n"; $cv->wait; This doesn't work and also if I telnet to localhost:44244 I get this: EV: error in callback (ignoring): AnyEvent::CondVar: recursive blocking wait attempted at server.pl line 29. I think if I understand how to make a mini, single threaded server that simply prints out whatever its given and then waits for more input, I could take it a lot further from there. Any ideas?

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  • Cannot call method 'wsl_wordpress_social_login'

    - by David Allen
    Hi I'm using a wordpress plugin to allow user to comment using facebook and twitter accounts. This is the page i am testing the plugin on http://blog.pcpal.co.uk/2012/03/london-underground-wi-fi-connectivity-due-within-months/ When i click the facebook icon its opens up a windows where i sign into facebook ad then directs to a blank pages which has a JS error see code below <html><head> <script> function init() { window.opener.wsl_wordpress_social_login({ 'action' : 'wordpress_social_login', 'provider' : 'Facebook' }); window.close(); } </script> </head> <body onload="init();"> </body></html> # Error is Uncaught TypeError: Cannot call method 'wsl_wordpress_social_login' of null If you can help then great.. Additional info Only seems to do it with chrome

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  • Casting Generic Types

    - by David Rutten
    Public Function CastToT(Of T)(ByVal GenericType(Of Object) data) As GenericType(Of T) Return DirectCast(data, GenericType(Of T)) End Function The above clearly does not work. Is there any way to perform this cast if I know that all objects inside data are in fact of Type T?

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  • [symfony] sfGuardDoctrine plugin and form messages

    - by David
    I'm using the sfGuardDoctrine plugin, and I would like to customize the form validation messages. How could I acomplish this? I can't find anything in the documentation. The only way I have found is to copy sfGuardValidatorUser.class into /apps/frontend/lib/validator, but I would like to know if there is some way to just override the error message, not override the entire validator...

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  • Count how many divs has a specific content?

    - by David
    I want to count how many divs with the class .tool that contain the following html by example : <b>Photoshop</b> <div class="tool"><b>After Effects</b></div> <div class="tool"><b>Photoshop</b></div> <div class="tool"><b>Illustrator</b></div> <div class="tool"><b>Photoshop</b></div> <div class="tool"><b>Photoshop</b></div> // This would return 3 How to do that using jQuery? i only can count all .tool divs? Thanks

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  • asp.net: Where can I put my source files.

    - by David Sykes
    I am developing a web form using Visual Web Developer Currently I have class source files in the same directory as the web form, or in the App_Code folder. I'd like to organise the files into folders within the web form folder, but I can't find a way of adding a reference to the folders, and they don't seem to be being picked up automatically. These are files that are under constant development. What is the asp.net/c#'s equivalent concept to c++'s #include?

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  • Are there any general guidelines for increasing the generation of reports?

    - by David Thielen
    Yes a lot of what you need to do is specific not only to the vendor you use, but also to the specific reports you are creating. However, there are also good general rules that hold for most reports. Vendor Best Practices BIRT Best Practices (more why you need a 3 day class to learn all of them) Crystal Reports Best Practices Microsoft Sql Server Best Practices Oracle B.I. Publisher Best Practices Windward Reports Best Practices General tips on designing a report Note: posted to self answer

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  • Using Constants in Perl

    - by David W.
    I am trying to define constants in Perl using the use Constant pragma: use Constant { FOO => "bar", BAR => "foo" }; I'm running into a bit of trouble, and hoping there's a standard way of handling it. First of all... I am defining a hook script for Subversion. To make things simple, I want to have a single file where the class (package) I'm using is in the same file as my actual script. Most of this package will have constants involved in it: print "This is my program"; package "MyClass"; use constant { FOO => "bar" }; sub new { yaddah, yaddah, yaddah. I would like my constant FOO to be accessible to my main program. I would like to do this without having to refer to it as MyClass::FOO. Normally, when the package is a separate file, I could do this in my main program: use MyClass qw(FOO); but, since my class and program are a single file, I can't do that. What would be the best way for my main program to be able to access my constants defined in my class? The second issue... I would like to use the constant values as hash keys: $myHash{FOO} = "bar"; The problem is that %myHash has the literal string FOO as the key and not the value of the constant. This causes problems when I do things like this: if (defined($myHash{FOO})) { print "Key " . FOO . " does exist!\n"; } I could force the context: if (defined("" . FOO . "")) { I could add parentheses: if (defined(FOO())) { Or, I could use a temporary variable: my $foo = FOO; if (defined($foo)) { None of these are really nice ways of handling this issue. So, what is the best way? Is there one way I'm missing? By the way, I don't want to use Readonly::Scalar because it is 1). slow, and 2). not part of the standard Perl package. I want to define my hook not to require additional Perl packages and to be as simple as possible to work.

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  • CSS/JS: Evenly spreading elements across multiple lines

    - by David Lawson
    How would you go about evenly spreading elements across multiple lines, for example: wrapper div: <div style="text-align: center"> elements inside: <div style="display: inline-block; padding-left: 10px; padding-right: 10px;">Element</div> Instead of only having one element on the next line (wrapped): Element 1 Element 2 Element 3 Element 4 Element 5 Element 6 It does this, spreading out the elements: Element 1 Element 2 Element 3 Element 4 Element 5 Element 6

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  • Flex NetConnection error: Property onDirtyList not found on flash.net.NetConnection

    - by David Wolever
    I'm having some trouble with NetConnection. The following code makes a connection without issue… var n:NetConnection = new NetConnection(); n.objectEncoding = ObjectEncoding.AMF0; n.addEventListener(NetStatusEvent.NET_STATUS, function(...args):void { trace("HERE"); }); n.connect("rtmp://...host...", ...args); But as soon as the NET_STATUS event handler finishes (ie, hitting "step into" with the debugger), I get this error: ReferenceError: Error #1069: Property onDirtyList not found on flash.net.NetConnection and there is no default value. Error #2044: Unhandled AsyncErrorEvent:. text=Error #2095: flash.net.NetConnection was unable to invoke callback onDirtyList. error=ReferenceError: Error #1069: Property onDirtyList not found on flash.net.NetConnection and there is no default value. at Test/___Test_Application1_creationComplete()[/Users/wolever/Workspace/Test/src/Test.mxml:13] at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.5.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9440] at mx.core::UIComponent/set initialized()[C:\autobuild\3.5.0\frameworks\projects\framework\src\mx\core\UIComponent.as:1168] at mx.managers::LayoutManager/doPhasedInstantiation()[C:\autobuild\3.5.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:718] at Function/http://adobe.com/AS3/2006/builtin::apply() at mx.core::UIComponent/callLaterDispatcher2()[C:\autobuild\3.5.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8744] at mx.core::UIComponent/callLaterDispatcher()[C:\autobuild\3.5.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8684] Which is kind of scary because onDirtyList only yields two hits on Google. So... Any suggestions?

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  • Application lifecycle. How to run something only when application starts

    - by David
    I have a dialog popup to indicate how long I want an activity to run. Seems simple enough, but its difficult to determine when the activity is really starting. If the user opens the keyboard on a G1 and thereby goes into landscape, that reruns the activities onCreate method. I can't have a static for the class or even create an application class, because I can't determine when the 'application' goes away. Even after destroying the only activity, the application is apparently still alive. Is there a way to determine that onCreate has been called because of the keyboard being extended or landscape mode invoked? Thanks

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  • Custom UITextField blurred text

    - by David
    When a UITextField with custom frame (200 × 54 px) loses focus, the text looks a little bit blurry. example screenshot Is this a common problem? Any workaround / solution or am I doing something wrong?

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  • Trying to get django app to work with mod_wsgi on CentOS 5

    - by David
    I'm running CentOS 5, and am trying to get a django application working with mod_wsgi. I'm using .wsgi settings I got working on Ubuntu. Here is the error: [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] SystemError: dynamic module not initialized properly [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] mod_wsgi (pid=23630): Target WSGI script '/data/hosting/cubedev/apache/django.wsgi' cannot be loaded as Python module. [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] mod_wsgi (pid=23630): Exception occurred processing WSGI script '/data/hosting/cubedev/apache/django.wsgi'. [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] Traceback (most recent call last): [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] File "/data/hosting/cubedev/apache/django.wsgi", line 8, in [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] import django.core.handlers.wsgi [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] File "/opt/python2.6/lib/python2.6/site-packages/django/core/handlers/wsgi.py", line 1, in [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] from threading import Lock [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] File "/opt/python2.6/lib/python2.6/threading.py", line 13, in [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] from functools import wraps [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] File "/opt/python2.6/lib/python2.6/functools.py", line 10, in [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] from _functools import partial, reduce [Thu Mar 04 10:52:15 2010] [error] [client 10.1.0.251] SystemError: dynamic module not initialized properly And here is my .wsgi file import os import sys os.environ['PYTHON_EGG_CACHE'] = '/tmp/django/' os.environ['DJANGO_SETTINGS_MODULE'] = 'cube.settings' sys.path.append('/data/hosting/cubedev') import django.core.handlers.wsgi application = django.core.handlers.wsgi.WSGIHandler()

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  • Can this jQuery code snippet be shortened?

    - by David Vidmar
    I have just stared using jQuery and although following code gets the job done, I have a feeling that it can be shortened. var accountAddress = $(document.createElement("input")).addClass("readOnly").attr("contentEditable", "false").attr("id", "d_accountAddress"); $("#customerid_c").next().next().next().append(accountAddress); If it is not clear - what I'm doing is creating new input tag, assigning class and making it readonly, then positioning new input two TD's to the right of some known text.

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