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When should I use Arrow functions in ECMAScript 6?
...Is that are patched or extended refer to instances with this.
(Stats via http://trends.builtwith.com/javascript/jQuery and https://www.npmjs.com.)
You are likely to require dynamic this bindings already.
A lexical this is sometimes expected, but sometimes not; just as a dynamic this is sometimes...
What are C++ functors and their uses?
...eate objects which "look like" a function:
// this is a functor
struct add_x {
add_x(int val) : x(val) {} // Constructor
int operator()(int y) const { return x + y; }
private:
int x;
};
// Now you can use it like this:
add_x add42(42); // create an instance of the functor class
int i = add...
How to log PostgreSQL queries?
...o it using a SQL statement like MySQL, but you can send a running server a command to reload the config with pg_ctl reload
– Jarret Hardie
Dec 8 '11 at 8:14
9
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How do I compare two hashes?
I am trying to compare two Ruby Hashes using the following code:
14 Answers
14
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Paging UICollectionView by cells, not screen
...nformance and set a value for pageWidth:
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
let pageWidth = // The width your page should have (plus a possible margin)
let proportionalOffset = collectionView.contentOffset.x / pageWidth
indexOfCellBeforeDragging = Int(round(p...
Match multiline text using regular expression
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Using GCC to produce readable assembly?
...leave the generated assembly code on the file foo.s.
Ripped straight from http://www.delorie.com/djgpp/v2faq/faq8_20.html (but removing erroneous -c)
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How do I select a random value from an enumeration?
...ve an array of all values. Then select a random array item.
static Random _R = new Random ();
static T RandomEnumValue<T> ()
{
var v = Enum.GetValues (typeof (T));
return (T) v.GetValue (_R.Next(v.Length));
}
Test:
for (int i = 0; i < 10; i++) {
var value = RandomEnumValue&l...
pyplot axes labels for subplots
...tplotlib.pyplot as plt
x = range(1, 101)
y1 = [random.randint(1, 100) for _ in xrange(len(x))]
y2 = [random.randint(1, 100) for _ in xrange(len(x))]
fig = plt.figure()
ax = fig.add_subplot(111) # The big subplot
ax1 = fig.add_subplot(211)
ax2 = fig.add_subplot(212)
# Turn off axis lines and ti...
SimpleTest vs PHPunit
...nit 3.7 it's even easier to install it by just using the PHAR Archive
wget http://pear.phpunit.de/get/phpunit.phar
chmod +x phpunit-3.7.6.phar
or for windows just downloading the phar and running:
php phpunit-.phar
or when using the supported composer install ways like
"require-dev": {
"phpuni...