Credit to @Remi, initState() is a method which is called once when the stateful widget is inserted in the widget tree. We generally override this method if we need to do some sort of initialisation work like registering a listener because, unlike build(), this method is called once. And to unregister your listener (or doing … Read more
that could be good bases for your class, I guess: class MyClass { // you may need to set the proper types in accordance with your dictionarty’s content var title: String? var shortDescription: String? var newsDescription: String? var link: NSURL? var pubDate: NSDate? // init () { // uncomment this line if your class has … Read more
You should probably call dict.__init__(self) when subclassing; in fact, you don’t know what’s happening precisely in dict (since it’s a builtin), and that might vary across versions and implementations. Not calling it may result in improper behaviour, since you can’t know where dict is holding its internal data structures. By the way, you didn’t tell … Read more
Put the following codes in the __init__.py inside the Animals directory. Python 3.x : from .Mammals import Mammals from .Birds import Birds On 2.x: from __future__ import absolute_import from .Mammals import Mammals from .Birds import Birds Explanation: It can’t find the module because it doesn’t know what directory to search to find the files Mammals … Read more
Your PYTHONPATH is set to the parent directory of the executed script. So if the executed script is inside a directory src, it will never be able to find the sister directory lib because it isn’t within the path. There’s a few choices; Just move lib/ into src/ if it belongs to your code. If … Read more
They determine the initialization order of built-in modules. Drivers will use device_initcall (or module_init; see below) most of the time. Early initialization (early_initcall) is normally used by architecture-specific code to initialize hardware subsystems (power management, DMAs, etc.) before any real driver gets initialized. Technical stuff for understanding below Look at init/main.c. After a few architecture-specific … Read more
It’s normal for the Init() method to be called multiple times. When an application starts up, the ASP.NET Worker process will instantiate as many HttpApplication objects as it thinks it needs, then it’ll pool them (e.g. reuse them for new requests, similar to database connection pooling). Now for each HttpApplication object, it will also instantiate … Read more
The designated initializer is the one that all the other initializers must call. UIView and subclasses are a little unusual in that they’ve actually got two such initializers: -initWithFrame: and -initWithCoder:, depending on how the view is created. You should override -initWithFrame: if you’re instantiating the view in code, and -initWithCoder: if you’re loading it … Read more
On RHEL systems, the /etc/rc.d/init.d/functions script is intended to provide similar to what you want. If you source that at the top of your init script, all of it’s functions become available. The specific function provided to help with this is daemon. If you are intending to use it to start a daemon-like program, a … Read more
You can explicitly mark your init as being unavailable in your header file: – (id) init __unavailable; or: – (id) init __attribute__((unavailable)); With the later syntax, you can even give a reason: – (id) init __attribute__((unavailable(“Must use initWithFoo: instead.”))); The compiler then issues an error (not a warning) if someone tries to call it.