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Use of def, val, and var in scala
...cala> def something = 2 + 3 * 4
something: Int
scala> something // now it's evaluated, lazily upon usage
res30: Int = 14
Example, val
scala> val somethingelse = 2 + 3 * 5 // it's evaluated, eagerly upon definition
somethingelse: Int = 17
Example, var
scala> var aVariable = 2 * 3...
In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
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Why is the __autoreleasing qualifier placed inbetween the stars, and not just in front of NSError**? This looks weird to me as the type is NSError**. Or is it because this is trying to indicate that the pointed-to NSError* pointer has to be qualified as po...
How do I convert between big-endian and little-endian values in C++?
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If you're using Visual C++ do the following: You include intrin.h and call the following functions:
For 16 bit numbers:
unsigned short _byteswap_ushort(unsigned short value);
For 32 bit numbers:
unsigned long _byteswap_u...
static files with express.js
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If there is only ONE parameter - then express.static expects that one parameter to be path....
– Seti
Dec 16 '16 at 8:21
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Difference between exit() and sys.exit() in Python
... are two similarly-named functions, exit() and sys.exit() . What's the difference and when should I use one over the other?
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Delete directory with files in it?
...n!). Here is an example:
public static function deleteDir($dirPath) {
if (! is_dir($dirPath)) {
throw new InvalidArgumentException("$dirPath must be a directory");
}
if (substr($dirPath, strlen($dirPath) - 1, 1) != '/') {
$dirPath .= '/';
}
$files = glob($dirPath...
Why does @foo.setter in Python not work for me?
...problems is that both methods need the same name for the property to work. If you define the setter with a different name like this it won't work:
@x.setter
def x_setter(self, value):
...
And one more thing that is not completely easy to spot at first, is the order: The getter must be defined...
Flask raises TemplateNotFound error even though template file exists
...dule, and that you did in fact put a home.html file in that subdirectory. If your app is a package, the templates folder should be created inside the package.
myproject/
app.py
templates/
home.html
myproject/
mypackage/
__init__.py
templates/
hom...
How to write an inline IF statement in JavaScript?
...e minor if the value is true, and major if the value is false.
This is known as a Conditional (ternary) Operator.
https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Conditional_Operator
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Swift equivalent for MIN and MAX macros
... minimum and maximum value between two numbers using MIN and MAX macros. Swift doesn't support macros and it seems that there are no equivalents in the language / base library. Should one go with a custom solution, maybe based on generics like this one ?
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