Detect exact string value of scalar in regex matching

Question

Say I have $foo = \"bar.baz\"

I want to use the scalar $foo to find strings that contain \"bar.baz\" (anywhere in the string), but not the regex-evalut

Answer 1

Pick one:

1. $foo = quotemeta("bar.baz");
2. if ($other =~ m/\Q$foo/)

(Both are actually the same thing, just done at different times.)