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quicksort :: Ord a => [a] -> [a] 
quicksort [] = [] 
quicksort (p:xs) = (quicksort lesser) ++ [p] ++ (quicksort greater) 
  where 
     lesser = filter (< p) xs 
     greater = filter (>= p) xs

tortoise = top
hare = top

forever:
     if hare == end :
         return 'No Loop Found'
     hare = hare.next
 
     if hare == end :
         return 'No Loop Found'
     hare = hare.next
 
     tortoise = tortoise.next
 
     if hare == tortoise:
         return 'Loop Found'

#include <iostream>
#include "unordered_set"
#include "basicActions.h"
using namespace std;

void createLoop(Node *head)
{
    Node *p = head;

    while (p->next != nullptr)
    {
        p = p->next;
    }
    p->next = head;
    return;
}

bool detectLoop(Node *head)
{
    unordered_set<Node *> s;
    Node *p = head;

    while (p != nullptr)
    {
        if (s.find(p) != s.end())
            return true;

        s.insert(p);
        p = p->next;
    }
    return false;
}

int main()
{
    Node *head = nullptr;
    insertAtEnd(head, 1);
    insertAtEnd(head, 2);
    insertAtEnd(head, 3);
    insertAtEnd(head, 4);
    insertAtEnd(head, 5);

    createLoop(head);

    detectLoop(head) ? cout << "Loop Detected.." << '\n' : cout << "No Loop Detected.." << '\n';
}

$myDateTime = DateTime::createFromFormat('Y-m-d', $dateString);
$newDateString = $myDateTime->format('m/d/Y');

const arrMin = arr => Math.min(...arr);
// arrMin([20, 10, 5, 10]) -> 5

const arrMax = arr => Math.max(...arr);
// arrMax([20, 10, 5, 10]) -> 20

const arrAvg = arr => arr.reduce((a,b) => a + b, 0) / arr.length
// arrAvg([20, 10, 5, 10]) -> 11.25

<img 
	src="example.com/cat.png" 
    alt="Photo of a cat" 
    height="50" 
    width="100"
    longdesc="#catDetails"
 >

.gradient {
  background-image:
    radial-gradient(
      yellow,
      #f06d06
    );
}

/* Linear gradient pattern */

.repeat {
  background-image: 
    repeating-linear-gradient(
      45deg,
      yellow,
      yellow 10px,
      red 10px,
      red 20px /* determines size */
    );
}

/* Radial gradient pattern */

.repeat {
  background: 
    repeating-radial-gradient(
      circle at 0 0, 
      #eee,
      #ccc 50px
    );
}

from functools import reduce

def compose(*fns):
  return reduce(lambda f, g: lambda *args: f(g(*args)), fns)


EXAMPLES
add5 = lambda x: x + 5
multiply = lambda x, y: x * y
multiply_and_add_5 = compose(add5, multiply)

multiply_and_add_5(5, 2) # 15

var x = 123;

//OPTION 1
var y = x.toString();           

//OPTION 2
var y = (123).toString();        

//OPTION 3
var y = (100 + 23).toString();   

// value of y is 123 in all 3 cases.

var x = 1.234;
 
var y = x.toExponential(2); 
// returns y = 1.23e+0
 
var y = x.toExponential(5);  
// returns y = 1.23450e+0

var x = 1.2345;

var y = x.toFixed(0);
//y equals 1;

var y = x.toFixed(2);
//y equals 1.23

var y = x.toFixed(5);
//y equals 1.23400

var x = 1234;
var y = x.valueOf(); 

var y = (1234).valueOf();

var y (1000+234).valueOf();

//y equals 1234 in all 3 cases