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Waiting until two async blocks are executed before starting another block
When using GCD, we want to wait until two async blocks are executed and done before moving on to the next steps of execution. What is the best way to do that?
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How to rotate portrait/landscape Android emulator? [duplicate]
I am new to Android development.
I know if you change a android phone from portrait to landscape sometimes the app relays its self out on the screen.. so how do I simulate rotating a phone with the emulator?
On the Blackberry emulators there's a button in the menu to turn the phone, but I can't f...
Check if a file exists with wildcard in shell script [duplicate]
...ll we needed to know, so we can break after the first iteration
break
done
This is very similar to @grok12's answer, but it avoids the unnecessary iteration through the whole list.
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Git resolve conflict using --ours/--theirs for all files
... a bad idea to create an alias for your shell of choice: Bash is the usual one.
This method should work through at least Git versions 2.4.x
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App Inventor 2 扩展 · App Inventor 2 中文网
...ot (yet) supported in iOS.
Overview of App Inventor extension components
How to use extension components
2.1 Importing extension components
2.2 Some sample extensions to try
2.3 Building projects with extension components
2.4 Deleting extension components
2.5 Sharing proj...
What REALLY happens when you don't free after malloc?
...lushed, or if they're a temp file, they might not get deleted when you're done. Also, database handles should have their transactions committed and then closed when you're done with them. Similarly, if you're using an object oriented language like C++ or Objective C, not freeing an object when you...
Best exception for an invalid generic type argument
... Unconstrained Melody ...
There are various useful things that can be done with generic
methods/classes where there's a type constraint of "T : enum" or "T :
delegate" - but unfortunately, those are prohibited in C#.
This utility library works around the prohibitions using ildasm/ilasm ...
In what order do static/instance initializer blocks in Java run?
... type T will be initialized immediately before the first occurrence of any one of the following:
T is a class and an instance of T is created.
T is a class and a static method declared by T is invoked.
A static field declared by T is assigned.
A static field declared by T is used and the field is ...
What is the Difference Between read() and recv() , and Between send() and write()?
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This is incorrect, there's one other difference in case of datagrams of 0 length - If a zero-length datagram is pending, read(2) and recv() with a flags argument of zero provide different behavior. In this circumstance, read(2) has...
What is a clean, pythonic way to have multiple constructors in Python?
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Actually None is much better for "magic" values:
class Cheese():
def __init__(self, num_holes = None):
if num_holes is None:
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Now if you want complete freedom of adding more parameters:
class Cheese():
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