Check whether a string contains one of multiple substrings

[needle1, needle2].any? { |needle| haystack.include? needle }

Try parens in the expression:

 haystack.include?(needle1) || haystack.include?(needle2)

You can do a regex match:

haystack.match? /needle1|needle2/

Or if your needles are in an array:

haystack.match? Regexp.union(needles)

(For Ruby < 2.4, use .match without question mark.)

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