public function testJoin()
{
$input = array('ąćęł', 'foo', 'bar', 123);
$expected = 'ąćęłfoobar123';
$this->assertEquals($expected, Arr::join($input));
$expected = 'ąćęł+foo+bar+123';
$this->assertEquals($expected, Arr::join($input, '+'));
}
public function fields($data = null)
{
return $data !== null ? Arr::only($data, $this->fields) : $this->fields;
}
/**
* Pass each value in an array trough a callback function. It passes both
* the value and the key to the callback, as opposed to array_map().
* @param callback $callback
* @return Arr
*/
public function map($callback, $values_only = false)
{
return new self(Arr::map($this->data, $callback, $values_only));
}