gnou

public struct TextSize {
    
    fileprivate struct CacheEntry: Hashable {
        let text: String
        let font: UIFont
        let width: CGFloat
        let insets: UIEdgeInsets
        
        fileprivate var hashValue: Int {
            return text.hashValue ^ Int(width) ^ Int(insets.top) ^ Int(insets.left) ^ Int(insets.bottom) ^ Int(insets.right)

chaoszcat

function shadeColor($color, $percent) {
	$num = base_convert(substr($color, 1), 16, 10);
	$amt = round(2.55 * $percent);
	$r = ($num >> 16) + $amt;
	$b = ($num >> 8 & 0x00ff) + $amt;
	$g = ($num & 0x0000ff) + $amt;
	
	return '#'.substr(base_convert(0x1000000 + ($r<255?$r<1?0:$r:255)*0x10000 + ($b<255?$b<1?0:$b:255)*0x100 + ($g<255?$g<1?0:$g:255), 10, 16), 1);
}

troelskn

<?php
function is_valid_luhn($number) {
  settype($number, 'string');
  $sumTable = array(
    array(0,1,2,3,4,5,6,7,8,9),
    array(0,2,4,6,8,1,3,5,7,9));
  $sum = 0;
  $flip = 0;
  for ($i = strlen($number) - 1; $i >= 0; $i--) {
    $sum += $sumTable[$flip++ & 0x1][$number[$i]];