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How do I implement a callback in PHP?
...y value that acts like a function pointer, referencing a function or class method for future invocation. This has allowed some elements of functional programming since PHP 4. The flavors are:
$cb1 = 'someGlobalFunction';
$cb2 = ['ClassName', 'someStaticMethod'];
$cb3 = [$object, 'somePublicMethod']...
What's a monitor in Java?
...
A monitor is mechanism to control concurrent access to an object.
This allows you to do:
Thread 1:
public void a()
{
synchronized(someObject) {
// do something (1)
}
}
Thread 2:
public void b()
{
synchronized(som...
Python exit commands - why so many and when should each be used?
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Let me give some information on them:
quit() simply raises the SystemExit exception.
Furthermore, if you print it, it will give a message:
>>> print (quit)
Use quit() or Ctrl-Z plus Return to exit
>>>
Th...
Callback functions in Java
Is there a way to pass a call back function in a Java method?
17 Answers
17
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Run a Python script from another Python script, passing in arguments [duplicate]
...cfile is different because it is designed to run a sequence of Python statements in the current execution context. That's why sys.argv didn't change for you.
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Uninstall / remove a Homebrew package including all its dependencies
I have a Homebrew formula that I wish to uninstall/remove along with all its dependencies, skipping packages whom other packages depend upon (a.k.a. Cascading package removal in Package manager parlance).
...
Random Number Between 2 Double Numbers
...maximum - minimum) + minimum;
}
Real code should have random be a static member. This will save the cost of creating the random number generator, and will enable you to call GetRandomNumber very frequently. Since we are initializing a new RNG with every call, if you call quick enough that the sy...
Getting activity from context in android
This one has me stumped.
11 Answers
11
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Debugging WebSocket in Google Chrome
Is there a way, or an extension, that lets me watch the "traffic" going through a WebSocket? For debugging purposes I'd like to see the client and server requests/responses.
...
How to set default values in Rails?
...; ActiveRecord::Migration
def self.up
change_column :people, :last_name, :type, :default => "Doe"
end
def self.down
# You can't currently remove default values in Rails
raise ActiveRecord::IrreversibleMigration, "Can't remove the default"
end
end
Because ActiveRecord autodi...