How to convert hex string to string or ubytes? Thanks.

[FrankLike]

On Monday, 5 February 2018 at 10:04:10 UTC, Seb wrote:
> On Monday, 5 February 2018 at 08:41:43 UTC, FrankLike wrote:

>> auto input = cast(string)hexString(hash);
> Use toHexString to get the string:

Sorry,'hexString(hash)' is my clerical error.

Thank you.I got the answer "no array".