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Do declared properties require a corresponding instance variable?
...ble with the property’s type, it is used—otherwise, you get a compiler error.
For the modern runtimes (see “Runtime Versions and Platforms” in Objective-C Runtime Programming Guide), instance variables are synthesized as needed. If an instance variable of the same name already exists, it i...
What is the difference between ? and Object in Java generics?
...me String");
All of the above method calls will result in a compile-time error because Java doesn't know what the Value type of the HashMap inside map is.
You can still get a value out of the hash map. Although you "don't know the value's type," (because you don't know what type of hash map is i...
“Debug only” code that should run only when “turned on”
...e] is in the System.Diagnostics; namespace. I stumbled a bit when I got:
Error 2 The type or namespace name 'ConditionalAttribute' could not be found (are you missing a using directive or an assembly reference?)
after using it for the first time (I thought it would have been in System).
...
What is the difference between IEqualityComparer and IEquatable?
...nt numbers for equality might not work as expected, due to minute rounding errors. There are different methods of comparing floating-point numbers for near-equality, each with specific advantages and trade-offs, and you might want to be able to choose yourself which method is appropriate.
sealed cl...
What is the curiously recurring template pattern (CRTP)?
...e. If you want to see the corner case anyway even though it does not cause error see here: ideone.com/LPkktf
– odinthenerd
Dec 6 '13 at 9:01
...
TypeScript with KnockoutJS
... your code and it helps you much with auto completion and perform type and error checking (much more than JavaScript). That is why we use definition files for code written in JavaScript so as to provide typescript type checking. Of course you could declare libs as "any", but this is not good.hope I ...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
... Does this work with regards to jupyter? I keep hitting memory errors because figures are not being garbage collected when I rerun a cell in jupyter.
– CMCDragonkai
Mar 5 '17 at 5:35
...
How does the @property decorator work in Python?
... return self
if self.fget is None:
raise AttributeError("unreadable attribute")
return self.fget(obj)
def __set__(self, obj, value):
if self.fset is None:
raise AttributeError("can't set attribute")
self.fset(obj, value)
def __de...
Which characters need to be escaped when using Bash?
... FYI bash's %q was broken for a long time - If my mind serves me well, an error was fixed (but might still be broken) in 2013 after being broken for ~10 years. So don't rely on it.
– Jo So
Feb 3 '17 at 17:36
...
How many bytes does one Unicode character take?
...
I mistyped; I had meant to say "non-BMP". The error in the answer is that it says that UTF-16 represents BMP characters, which is inaccurate. UTF-16 can encode all unicode characters-- non-BMP characters are encoded via surrogate pairs. Perhaps the answerer was confuse...