}); // => [0,1,2] reduce: $sum = _::reduce([1, 2, 3], function ($memo, $num) { return $memo + $num; }, 0); // => 6 reduceRight: $list = [[0, 1], [2, 3], [4, 5]]; $flat = _::reduceRight($list, function ($a, $b) { return array_merge($a, $b); }, []); // => [4,5,2,3,0,1] find: $even = _::find([1, 2, 3, 4, 5, 6], function ($num) { return $num % 2 == 0; }); // => 2 filter: $evens = _::filter([1, 2, 3, 4, 5, 6], function ($num) { return $num % 2 == 0; }); // => [2,4,6] where: $people = [['name' => 'Jack Nicholson', 'born' => 1937, 'profession' => 'actor'], ['name' => 'Morgan Freeman', 'born' => 1937, 'profession' => 'actor'], ['name' => 'Leonardo Dicaprio', 'born' => 1974, 'profession' => 'actor'], ['name' => 'Nathalie Portman', 'born' => 1981, 'profession' => 'actor'], ['name' => 'Ridley Scott', 'born' => 1937, 'profession' => 'producer']]; $actorsBornIn1937 = _::where($people, ['born' => 1937, 'profession' => 'actor']); // => Jack Nicholson & Morgan Freeman findWhere: $people = [['name' => 'Jack Nicholson', 'born' => 1937, 'profession' => 'actor'], ['name' => 'Morgan Freeman', 'born' => 1937, 'profession' => 'actor'], ['name' => 'Leonardo Dicaprio', 'born' => 1974, 'profession' => 'actor'], ['name' => 'Nathalie Portman', 'born' => 1981, 'profession' => 'actor'], ['name' => 'Ridley Scott', 'born' => 1937, 'profession' => 'producer']]; $actor = _::findWhere($people, ['born' => 1937, 'profession' => 'actor']); // => Jack Nicholsonn