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performSelector may cause a leak because its selector is unknown
...re calling. The result could be anything: void, int, char, NSString *, id, etc. ARC normally gets this information from the header of the object type you're working with.3
There are really only 4 things that ARC would consider for the return value:4
Ignore non-object types (void, int, etc)
Retain...
Scheduling recurring task in Android
...n is not currently running. For normal timing operations (ticks, timeouts, etc) it is easier and much more efficient to use Handler.
Timer
timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
synchronized public void run() {
\\ here your todo;
}
...
Good example of livelock?
... This time I have modified it to create deadlock, race condition, livelock etc.
So let's understand the problem statement first;
Cookie Maker Problem
There are some ingredient containers: ChocoPowederContainer, WheatPowderContainer. CookieMaker takes some amount of powder from ingredient containe...
What are best practices that you use when writing Objective-C and Cocoa? [closed]
...nter-caps (CamelCase) in method names, parameters, variables, class names, etc. rather than underbars (underscores).
Class names start with an upper-case letter, variable and method names with lower-case.
Whatever else you do, don't use Win16/Win32-style Hungarian notation. Even Microsoft gave up...
Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
...various cluster validity metrics, I came across Dunn's Index, Elbow method etc. wasn't really sure which one to utilize so thought I will start off with the Elbow method.
– Legend
Jul 11 '11 at 17:24
...
How to implement custom JsonConverter in JSON.NET to deserialize a List of base class objects?
...ues (Culture, DateParseHandling, DateTimeZoneHandling, FloatParseHandling, etc...). These values should be copied over before using the new JsonReader in serializer.Populate().
– Alain
Feb 7 '14 at 15:57
...
Representing and solving a maze given an image
...invoke: python mazesolver.py <mazefile> <outputfile>[.jpg|.png|etc.]
base_img = Image.open(sys.argv[1])
base_pixels = base_img.load()
path = BFS(start, end, base_pixels)
path_img = Image.open(sys.argv[1])
path_pixels = path_img.load()
for position in path:
...
What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
... Further, let's assume that any Func passed in as a selector / mutator / etc. is a cheap O(1) operation.
5 Answers
...
what is the difference between a portlet and a servlet?
...ds they differ in containers, APIs, life cycle, configuration, deployment, etc.
The main difference between portlet vs. servlet could be that while servlet always responds to single type of action - request, portlet (due to nature of its life cycle and stronger container bindings) has to respond t...
Do you have to put Task.Run in a method to make it async?
...<T> or one of its shortcuts (TaskFactory.FromAsync, Task.FromResult, etc). I don't recommend wrapping an entire method in Task.Run; synchronous methods should have synchronous signatures, and it should be left up to the consumer whether it should be wrapped in a Task.Run:
private int DoWork()...