First

Accumulates only the first value of a column.

$sloth = Sloth::from($data)
    ->group('foo', 'baz')
    ->first();

$sloth->print();

foo     baz
one     1
two     4

print_r($sloth->fetch());

Array
(
    [0] => Array
    (
        [foo] => one
        [baz] => 1
    )
    [1] => Array
    (
        [foo] => two
        [baz] => 4
    )
)