I have a string of words; let's call them bad:

bad = "foo bar baz"

I can keep this string as a whitespace separated string, or as a list:

bad = bad.split(" ");

If I have another string, like so:

str = "This is my first foo string"

What's the fasted way to check if any word from the bad string is within my comparison string, and what's the fastest way to remove said word if it's found?

#Find if a word is there
bad.split(" ").each do |word|
  found = str.include?(word)
end

#Remove the word
bad.split(" ").each do |word|
  str.gsub!(/#{word}/, "")
end