How to split a string of repeated characters with uneven amounts? Ruby

Question

If I have a string such as \"aabbbbccffffdeffffgg\" and I wanted to split the string into this array: [\"aa\", \"bbbb\", \"cc\", \"ffffd\", \"e\", \"ffff\", \

Answer 1

Here is a non-regexp version

str = "aabbbbccffffdeffffgg"
p str.chars.chunk(&:itself).map{|x|x.last.join} #=> ["aa", "bbbb", "cc", "ffffd", "e", "ffff", "gg"]