Find overlapping Regexp matches

Question

I want to find all matches within a given string including overlapping matches. How could I achieve it?

# Example
\"a-b-c-d\".???(/\\w-\\w/)  # => [\"a-b\         


        

Answer 1

Use capturing inside a positive lookahead:

"a-b-c-d".scan(/(?=(\w-\w))/).flatten
 # => ["a-b", "b-c", "c-d"]

See Ruby demo