What is the best way to chop a string into chunks of a given length in Ruby?

Question

I have been looking for an elegant and efficient way to chunk a string into substrings of a given length in Ruby.

So far, the best I could come up with is this:

Answer 1

Here is another way to do it:

"abcdefghijklmnopqrstuvwxyz".chars.to_a.each_slice(3).to_a.map {|s| s.to_s }

=> ["abc", "def", "ghi", "jkl", "mno", "pqr", "stu", "vwx", "yz"]