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C# Thread safe fast(est) counter
...ok at the C# lock() statement's IL. Here you will see calls to Monitor in order to begin or end a section.
In other words, .Net lock() statement is doing a lot more than the .Net Interlocked.Increment.
SO, if all you want to do is increment a variable, Interlock.Increment will be faster. Revie...
Why is String immutable in Java?
...ant Pool article, every application creates too many string objects and in order to save JVM from first creating lots of string objects and then garbage collecting them. JVM stores all string objects in a separate memory area called String constant pool and reuses objects from that cached pool.
When...
Class method differences in Python: bound, unbound and static
...calls the __get__() method of the CPO to access the value it contains.
In order to determine if a CPO is a descriptor, python interpretor checks if it implements the descriptor protocol. To implement descriptor protocol is to implement 3 methods
def __get__(self, instance, owner)
def __set__(self,...
SQL Server 2008 can't login with newly created user
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Understand the “Decorator Pattern” with a real world example
...and final bill-amount will be composed of the base pizzas and additionally ordered toppings. Each topping decorator would know about the pizzas that it is decorating and it's price. GetPrice() method of Topping object would return cumulative price of both pizza and the topping.
EDIT
Here's a code-...
How to pass parameters using ui-sref in ui-router to controller
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Transpose/Unzip Function (inverse of zip)?
... same in Python 3 except that it returns an iterator instead of a list. In order to get the same output as above you just need to wrap the zip call in a list: list(zip(*[('a', 1), ('b', 2), ('c', 3), ('d', 4)])) will output [('a', 'b', 'c', 'd'), (1, 2, 3, 4)]
– MJeffryes
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Getting the folder name from a path
...oryInfo class gets initialized once thus allowing only first-time call. In order to bypass this limitation, ensure you use variables within your loop to store any individual directory's name.
For example, this sample code loops through a list of directories within any parent directory while adding ...
Elegant way to check for missing packages and install them?
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@krlmlr Nope, because in order for the if statement to be evaluated it must first evaluate require, the side-effect of which is loading the package if it is available!
– Simon O'Hanlon
Nov 8 '13 at 23:26
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ViewPager and fragments — what's the right way to store fragment's state?
... in the fragment class
public class CustomFragment extends Fragment
in order for all this to work, there were two changes, first
public class CustomFragment extends Fragment implements Serializable
and then adding this to onCreate so Fragments aren't destroyed
setRetainInstance(true);
I'm ...