Escaping single and double quotes in a string in ruby?

Question

How can I escape single and double quotes in a string?

I want to escape single and double quotes together. I know how to pass them separately but don\'t know how to

Answer 1

One caveat:

Using %Q[] and %q[] for string comparisons is not intuitively safe.

For example, if you load something meant to signify something empty, like "" or '', you need to use the actual escape sequences. For example, let's say qvar equals "" instead of any empty string.

This will evaluate to false
if qvar == "%Q[]"

As will this,
if qvar == %Q[]

While this will evaluate to true
if qvar == "\"\""

I ran into this issue when sending command-line vars from a different stack to my ruby script. Only Gabriel Augusto's answer worked for me.