How to create a mutable array of strings?

[Dennis Ritchie via Digitalmars-d-learn]

On Sunday, 17 May 2015 at 09:06:40 UTC, Dennis Ritchie wrote:
> Hi,
> It seems to me, or D do not create mutable array of strings?
>
> How to create a mutable equivalent of a string array?
>
> -----
> string[] s = ["foo", "bar"];
> // s[1][1] = 't'; // immutable expression s[1][1]

It's uncomfortable:
-----
char[][] s = [['f', 'o', 'o'], ['b', 'a', 'r']];
s[1][1] = 't';