Why is bytes[] a nested array?

Question

Using bytes[] foo as a function argument

contract b {

function c(bytes[] foo) {

}

}

in https://remix.ethereum.org gives error

UnimplementedFeatureError: Nested arrays not yet implemented.

Why?

Answer 1

bytes on its own is already a dynamically sized byte array.

Adding an additional [] makes it a dynamically sized array of dynamically sized byte arrays.

Please refer to the manual:

http://solidity.readthedocs.io/en/develop/types.html#dynamically-sized-byte-array