How to include periods when choosing a word in vim?

Question

Let's say I call a method on an object in my code, like

if abc.xyz then foo

My cursor is on 'c' in 'abc' and I want to change abc.xyz to something else. If I type ciw, I will only replace "abc". What can I use instead iwso that it selects the entire "abc.xyz"?

Answer 1

Use Wto separate words only with whitespace, it will select a whole line:

ciW

Answer 2

Include .in options iskeyword:

set iskeyword=@,48-57,_,192-255,.