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How do I declare class-level properties in Objective-C?
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edited Jul 7 '15 at 11:23
Erik Aigner
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Safely override C++ virtual functions
I have a base class with a virtual function and I want to override that function in a derived class. Is there some way to make the compiler check if the function I declared in the derived class actually overrides a function in the base class? I would like to add some macro or something that ensures ...
How do I auto size a UIScrollView to fit its content
... make a UIScrollView auto-adjust to the height (or width) of the content it's scrolling?
21 Answers
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Python nonlocal statement
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Compare this, without using nonlocal:
x = 0
def outer():
x = 1
def inner():
x = 2
print("inner:", x)
inner()
print("outer:", x)
outer()
print("global:", x)
# inner: 2
# outer: 1
# global: 0
To this, usi...
How to convert an array to object in PHP?
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In the simplest case, it's probably sufficient to "cast" the array as an object:
$object = (object) $array;
Another option would be to instantiate a standard class as a variable, and loop through your array while re-assigning the values:
$obje...
What's the difference between eval, exec, and compile?
...on, and exec is used to execute dynamically generated Python code only for its side effects.
eval and exec have these two differences:
eval accepts only a single expression, exec can take a code block that has Python statements: loops, try: except:, class and function/method definitions and so on...
What's the difference between assignment operator and copy constructor?
...the difference between assignment constructor and copy constructor in C++. It is like this:
8 Answers
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What does “abstract over” mean?
Often in the Scala literature, I encounter the phrase "abstract over", but I don't understand the intent. For example , Martin Odersky writes
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Pick any kind of file via an Intent in Android
...new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("file/*");
startActivityForResult(intent, PICKFILE_REQUEST_CODE);
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How do I get a file extension in PHP?
This is a question you can read everywhere on the web with various answers:
28 Answers
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