public function testKeyOffset()
{
$ary = array(4 => "zero", 2 => "one", 8 => "two", 32 => "three", 16 => "four", 64 => "five");
$this->assertEquals(0, \r8\ary\keyOffset($ary, 4));
$this->assertEquals(5, \r8\ary\keyOffset($ary, 64));
$this->assertEquals(3, \r8\ary\keyOffset($ary, 32));
try {
\r8\ary\keyOffset($ary, 65432);
$this->fail('An expected exception has not been raised.');
} catch (\r8\Exception\Argument $err) {
$this->assertSame("Key does not exist", $err->getMessage());
}
}
/**
* Returns the offset of the pointer in an array
*
* @param Array $array The array to operate on
* @return Integer|NULL Returns the offset, or NULL if the array is empty
*/
function pointer(array &$array)
{
if (empty($array)) {
return NULL;
}
return \r8\ary\keyOffset($array, key($array));
}
