I've never seen code like this: public static function getInstance() { if ( ! isset(self::$_instance)) { self::$_instance = new self(); } return self::$_instance; } Is it the same as new className() ? EDIT If the class is inheritant,which class does it point to? ...
I'm trying to set a function to do something like this def __binaryTreeInsert(self, toInsert, currentNode=getRoot(), parentNode=None): where current node starts as root, and then we change it to a different node in the method and recursivly call it again. However, i cannot get the 'currentNode=getRoot()' to work. If i try calling ...
Hi I have created a Self Signed Applet , but not able to access local files system .What have i to do ? ...
Hi, Found a piece of code today, that I find a little smelly... TMyObject.LoadFromFile(const filename: String); begin if fileExists(filename) then self := TSomeObjectStreamer.ReadObjectFromFile(filename); end; If this code works, it will at least leak some memory, but does it work? Is OK to assign to self in this manner? Wha...
I want to search for all elements with class needle in all elements returned by jQuery('.haystack') and have tried jQuery('.haystack .needle'), but this doesn't seem to pick up the case where an element has both classes. Is there a selector that will do this? ...
class attrdict(dict): def __init__(self, *args, **kwargs): dict.__init__(self, *args, **kwargs) self.__dict__ = self a = attrdict(x=1, y=2) print a.x, a.y b = attrdict() b.x, b.y = 1, 2 print b.x, b.y Could somebody explain the first four lines in words? I read about classes and methods. But here it seems very co...
Hello, I am trying to bind a value of a slider control to a property that is in the same control: <Slider Value="{Binding Path=ValueProperty, RelativeSource={RelativeSource Self}}" Name="slider1" /> but it doesn't bind to a "ValuePropery"... What am I doing wrong? ...
can you tell me simple real-world examples for (self,left outer,right outer,full outer) join? ...
What is the purpose of the 'self' word in python. I understand it refers to the specific object created from that class, but i cant see why it explicitly needs to be added to very function as a parameter. To illustrate, in ruby, i could do this: class myClass def myFunc(name) @name = name end end Which i understand, qu...
I have a table with typical statistics on page view and emails. An email creates a row and page view creates a row... I want to chart the page views and emails on a daily basis for the past 30 days (for example) so I need to show the day and the value... even if it ZERO. I cannot have missing days from my results or the chart breaks. ...
Hi Guys, This is probably incredibly simple, but I just cant see the wood for the trees at the moment. For brevity, I would like to model a word object, that has related words to it (synonyms), In doing so I could have the following mappings: <class name="Word" table="bs_word"> <id name="Id" column="WordId" type="Int32" unsaved-value=...
Lets say I made a method that can tabulate the total of x and y. total = [self totalThemUp x:30 y:50]; Is self correctly used? Why so? I don't see any object in particular that is acted on. Thanks for your help! ...
I have a form that reloads the page with the updated data: <form name="form" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> ... <input type="submit" name="Submit" value="Update data"> </form> When the page is updated I want to display a message "Data updated". There was something like this with Referer I beleve, b...
Is that possible to write a program that reads in a integer n and outputs the program itself n times? ...
I am having trouble to understand how to expose the WCF services through Javascript. Here are what I found after days of research: Exposing WCF services through Javascript but not self host: http://msdn.microsoft.com/en-us/library/bb472488.aspx In this example, it requires the creation of a .svc file <%@ServiceHost language="c#" Debug=...
Hey, I've got a question about self invoking functions in javascript. What I'm doing is something similar to the following myNamespace = {}; //namespace for holding any objects/functions //helpModule as an example myNamespace.HelpModule = new (function(){ this.abc = '123'; //lots of other code in here... })(); now I'm abl...
Hi, I have a model like so: class Activity(models.Model): title = models.CharField(max_length=200) summary = models.TextField(null=True, blank=True) tasks = models.ManyToManyField('self', symmetrical=False, null=True, blank=True) It works like this, an activity can be linked to itself and the parent activity is call...
I'm trying to implament a callback mechanism where I pass in a block to the init of a class, and after some work that class calls me back. The block gets called and most everything works, except when I call anything on "self" within the block. I get Program received signal: “EXC_BAD_ACCESS”. unless I comment out any reference to self...
I read here that "self Refers to the current window or form". Self does not seem to refer to the current form in this case: <form><input type="text" onkeyup="alert(self.foo.value)" name="foo"></form> However in this case it works (referring to the window): <form><input type="text" onkeyup="alert(self.document.forms[0].foo.value)" ...
From what I read/understand, the 'self' parameter is similiar to 'this'. Is that true? If its optional, what would you do if self wasnt' passed into the method? ...