Conditional replace in vim

Question

I\'d like do use vim search-and-replace to replace all \" with \' and vice-versa. Is there a way to achieve this in one step? I\'m thinking of something like this:

Answer 1

That's a case for :help sub-replace-special:

:s/["']/\=submatch(0) == '"' ? "'" : '"'/g

This matches any of the two quotes (in a simpler way with [...]), and then uses the ternary operator to turn each quote into its opposite. (For more complex cases, you could use Dictionary lookups.)