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When to use volatile with multi threading?
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However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it?
But in that case, between the thread locking and releasing the mutex the code is in a critical section where only that one thread can access the variable, in which case the variable ...
How do I make class methods / properties in Swift?
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They are called type properties and type methods and you use the class or static keywords.
class Foo {
var name: String? // instance property
static var all = [Foo]() // static type property
class var comp: In...
What is the garbage collector in Java?
...to Java and confused about the garbage collector in Java. What does it actually do and when does it comes into action. Please describe some of the properties of the garbage collector in Java.
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Why are const parameters not allowed in C#?
It looks strange especially for C++ developers. In C++ we used to mark a parameter as const in order to be sure that its state will not be changed in the method. There are also other C++ specific reasons, like passing const ref in order to pass by ref and be sure that state will not be changed. ...
Checking whether a variable is an integer or not [duplicate]
...t use type. It is almost never the right answer in Python, since it blocks all the flexibility of polymorphism. For instance, if you subclass int, your new class should register as an int, which type will not do:
class Spam(int): pass
x = Spam(0)
type(x) == int # False
isinstance(x, int) # True
Thi...
SQL Server ':setvar' Error
... running the script either via the menu as above or ensure your custom install script does so before it runs.
– rism
May 20 '12 at 1:39
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BAT file: Open new cmd window and execute a command in there
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If you're using this to run a rails server you actually don't need to type cmd. You can just type start rails s.
– fbonetti
Jun 27 '13 at 17:51
add a c...
Calling JMX MBean method from a shell script
... libraries that would allow me to call a JMX MBean method from a shell script. We expose some operations/admin commands through JMX, and we could have our admins use JConsole, or VisualVM, but some tasks are better left to automation. In that automation we'd like to be able to call a JMX MBean metho...
How do I delete/remove a shell function?
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unset -f z
Will unset the function named z. A couple people have answered with:
unset z
but if you have a function and a variable named z only the variable will be unset, not the function.
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Can someone explain __all__ in Python?
I have been using Python more and more, and I keep seeing the variable __all__ set in different __init__.py files. Can someone explain what this does?
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