コード例 #1
0
function _memoize($function, $hashFunction = NULL, &$cache = NULL)
{
    return Underscore::memoize($function, $hashFunction, $cache);
}
コード例 #2
0
ファイル: Underscore.php プロジェクト: brombal/underscore.php
 /**
  * @tags functions
  */
 public function testMemoize()
 {
     // it should return a memoized version of the function
     $fn = function () {
         static $count = 0;
         return ++$count;
     };
     $memo = _::memoize($fn);
     for ($i = 0; $i < 3; $i++, $memo()) {
     }
     $this->integer($memo())->isEqualTo(1);
     // it should be possible to override the hash function
     $hash = function ($args) {
         return array_sum($args);
     };
     $fn = function ($a, $b, $c) {
         return $a + $b + $c;
     };
     $memo = _::memoize($fn, $hash);
     $res[] = $memo(1, 2, 3);
     $res[] = $memo(1, 4, 5);
     // is different from $a because hash function uses all arguments
     $res[] = $memo(1, 6, 7);
     // is different from $a because hash function uses all arguments
     $this->array($res)->isEqualTo([6, 10, 14]);
     // it should be possible to override the cache
     $cache = [];
     $fn = function ($a) {
         return $a * $a;
     };
     $memo = _::memoize($fn, null, $cache);
     $memo(1);
     // 1
     $memo(2);
     // 4
     $memo(3);
     // 9
     $this->array($cache)->isEqualTo([1 => 1, 2 => 4, 3 => 9]);
     // it should throw an InvalidArgumentException if cache is not suitable
     $this->exception(function () {
         $cache = "hello";
         _::memoize(function () {
         }, null, $cache);
     })->isInstanceOf('\\InvalidArgumentException');
 }