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JavaScript isset() equivalent
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// Simple checking if we have a declared variable
isset(some) // true
// Now trying to see if we have a top level property, still valid
isset(some.nested) // false
// But here is where things fall apart: trying to access a deep property
// of a complex object; it will throw an error
isset(some.ne...
Generate random numbers with a given (numerical) distribution
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@EugenePakhomov That's nice, I didn't know that. I can see there is an answer mentioning this further, but it doesn't contain any example code and hasn't a lot of upvotes. I'll add a comment to this answer for better visibility.
– Sven Marn...
Applications are expected to have a root view controller at the end of application launch
...ate class is imported in main and use NSStringFromClass. That's how Xcode now creates the main.m file. For example: #import "AppDelegate.h and then int retVal = UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
– sho
Dec 21 '11 at 7:5...
How do I change Eclipse to use spaces instead of tabs?
...r > New, then choose any Profile name, ensure that Open the edit dialog now is enabled, hit OK, then under the Indentation tab, you'll see Tab Policy. Set it to Spaces Only.
– Garrett
May 4 '14 at 22:44
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How to invoke the super constructor in Python?
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def __init__(self):
print("hello")
super().__init__()
super() is now equivalent to super(<containing classname>, self) as per the docs.
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Sending and Parsing JSON Objects in Android [closed]
... is included in Android.
But I think it is also worth noting that Android now has its own full featured JSON API.
This was added in Honeycomb: API level 11.
This comprises
- android.util.JsonReader: docs, and source
- android.util.JsonWriter: docs, and source
I will also add one additional consi...
Custom checkbox image android
...:background instead of android:button and ended up with 2 buttons instead. Now it all works well.
– Artem Russakovskii
Nov 23 '10 at 23:07
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Algorithm to find Largest prime factor of a number
...fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) = a^2 - b^2 and is easy to understand and implement. Unfortunately it's not very fast in general.
The best known method for factoring numbers up t...
What exactly does += do in python?
I need to know what += does in python. It's that simple. I also would appreciate links to definitions of other short hand tools in python.
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Git is ignoring files that aren't in gitignore
... somewhere that I can't seem to find? I have to specify files to add them now, and it's giving me this warning:
14 Answers...