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Is there an equivalent of 'which' on the Windows command line?
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Windows Server 2003 and later (i.e. anything after Windows XP 32 bit) provide the where.exe program which does some of what which does, though it matches all types of files, not just executable commands. (It does not match built-in shell commands like cd.) It will even accept wildc...
Is the C# static constructor thread safe?
...ngleton
{
private static Singleton instance;
// Added a static mutex for synchronising use of instance.
private static System.Threading.Mutex mutex;
private Singleton() { }
static Singleton()
{
instance = new Singleton();
mutex = new System.Threading.Mutex();
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In practice, what are the main uses for the new “yield from” syntax in Python 3.3?
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Let's get one thing out of the way first. The explanation that yield from g is equivalent to for v in g: yield v does not even begin to do justice to what yield from is all about. Because, let's face it, if all yield from does is expand the for loop, then it does not warr...
How do I determine file encoding in OS X?
I'm trying to enter some UTF-8 characters into a LaTeX file in TextMate (which says its default encoding is UTF-8), but LaTeX doesn't seem to understand them.
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How do I delete a Git branch locally and remotely?
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A semantics for Bash scripts?
...ing for a more formal introduction to Bash as a programming language. For example: What is the evaluation order? what are the scoping rules? What is the typing discipline, e.g. is everything a string? What is the state of the program -- is it a key-value assignment of strings to variable names; is t...
How can I use Homebrew to install both Python 2 and 3 on Mac?
...an install different versions of python and choose which one you can use. Example:
$ pyenv install 2.7.5
You can check the versions you have installed with:
$ pyenv versions
And you can switch between python versions with the command:
$ pyenv global 3.3.1
Also you can set a python version f...
How do I initialize a byte array in Java?
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Using a function converting an hexa string to byte[], you could do
byte[] CDRIVES = hexStringToByteArray("e04fd020ea3a6910a2d808002b30309d");
I'd suggest you use the function defined by Dave L in Convert a string representation of a hex dump to a byte ar...
How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
...has a transform (other than the default identity transform) - but that is exactly what autolayout does. The way autolayout works is that in layoutSubviews the runtime comes dashing through all the constraints and setting the frames of all the views accordingly.
In other words, the constraints are n...
How do I exit the Vim editor?
...ottom of the screen and you can type in one of the following commands. To execute a command, press the Enter key.
:q to quit (short for :quit)
:q! to quit without saving (short for :quit!)
:wq to write and quit
:wq! to write and quit even if file has only read permission (if file does not have wr...