Array
(
    [0] => 0
    [1] => 1
    [100] => 2
)
Array
(
    [0] => a
    [1] => b
    [2] => c
)
Array
(
    [0] => Array
        (
            [0] => 棒
            [1] => 老虎
        )

    [1] => Array
        (
            [0] => 雞
            [1] => 蟲
        )

)