How to sort comma separated (or otherwise) text?

Question

Suppose I have the following text:

int z;
int a;
int c;
int g;

or the following text:

z, a, c, g

How can I sort them to:

int a;
int c;
int g;
int z;

and

a, c, g, z

respectively?

Answer 1

Use M-x sort-lines for the first example. For the second example, change it into

z, a, c, g,

then use M-x sort-regexp-fields ., \&.