/**
* Creates a list with the given choices and values.
*
* The given choice array must have the same array keys as the value array.
* Each choice must be castable to an integer/string according to the
* casting rules described in {@link toArrayKey()}.
*
* If no values are given, the choices are cast to strings and used as
* values.
*
* @param array|\Traversable $choices The selectable choices
* @param callable $value The callable for creating the value
* for a choice. If `null` is passed, the
* choices are cast to strings and used
* as values
*
* @throws InvalidArgumentException If the keys of the choices don't match
* the keys of the values or if any of the
* choices is not scalar
*/
public function __construct($choices, $value = null)
{
// If no values are given, use the choices as values
// Since the choices are stored in the collection keys, i.e. they are
// strings or integers, we are guaranteed to be able to convert them
// to strings
if (null === $value) {
$value = function ($choice) {
return (string) $choice;
};
$this->useChoicesAsValues = true;
}
parent::__construct($choices, $value);
}
/**
* Creates a list with the given choices and values.
*
* The given choice array must have the same array keys as the value array.
* Each choice must be castable to an integer/string according to the
* casting rules described in {@link toArrayKey()}.
*
* If no values are given, the choices are cast to strings and used as
* values.
*
* @param array $choices The selectable choices
* @param callable $value The callable for creating the value for a
* choice. If `null` is passed, the choices are
* cast to strings and used as values
*
* @throws InvalidArgumentException If the keys of the choices don't match
* the keys of the values or if any of the
* choices is not scalar
*/
public function __construct(array $choices, $value = null)
{
$choices = array_map(array(__CLASS__, 'toArrayKey'), $choices);
if (null === $value) {
$value = function ($choice) {
return (string) $choice;
};
$this->useChoicesAsValues = true;
}
parent::__construct($choices, $value);
}
