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What does an exclamation mark mean in the Swift language?
...This enum describes whether the variable holds a value (Some(T)), or not (None).
If there is a value, this can be obtained by "unwrapping" the variable (obtaining the T from Some(T)).
How is john!.apartment = number73 different from john.apartment = number73? (Paraphrased)
If you write the n...
Git ignore file for Xcode projects
...sing the top-voted answer, but it needs a bit of cleanup, so here it is redone for Xcode 4, with some improvements.
I've researched every file in this list, but several of them do not exist in Apple's official Xcode documentation, so I had to go on Apple mailing lists.
Apple continues to add undoc...
Declaring a custom android UI element using XML
...
The Android Developer Guide has a section called Building Custom Components. Unfortunately, the discussion of XML attributes only covers declaring the control inside the layout file and not actually handling the values inside the class initialisation. The steps are as follows:
1. Declare attr...
How bad is shadowing names defined in outer scopes?
... the warnings and hints it provides me to improve my code. Except for this one which I don't understand:
8 Answers
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Require returns an empty object
...js.org/api/modules.html
If its possible to dynamically add that schema to one of those ActiveRecord objects, that's one way to solve this. This is actually kind of a tricky situation. In fact, even without the module system, this would cause problems for you. If you put all this code in one file, h...
Difference between java.util.Random and java.security.SecureRandom
...), from a comment on the method protected int next(int bits), which is the one that generates the random values:
This is a linear congruential pseudorandom number generator, as
defined by D. H. Lehmer and described by Donald E. Knuth in
The Art of Computer Programming, Volume 3:
Semi...
How to detect if a script is being sourced
...that holds a stack trace of sources, where ${BASH_SOURCE[0]} is the latest one. The braces are used here to tell the bash what is part of the variable name. They are not necessary for $0 in this case, but they do not hurt either. ;)
– Konrad
Jan 22 '16 at 17:23...
What is the correct file extension for GLSL shaders? [closed]
...ondering if there is a standard file format, or which way is the 'correct' one?
6 Answers
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javac option to compile all java files under a given directory recursively
...e sources.txt file each time you create a new source or rename an existing one file which is an easy to forget (thus error-prone) and tiresome task.
Using a build tool
On the long run it is better to use a tool that was designed to build software.
Using Ant
If you create a simple build.xml file tha...
How to wait for a number of threads to complete?
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The bugs mentioned in Effective Java should have been fixed in Java 6. If newer java versions aren't a restriction, it's better to use Futures to solve thread problems. Martin v. Löwis: You're right. It's not relecant for that problem, ...