hoanga

#!/usr/bin/env ruby
# https://gist.github.com/hoanga/4955d1da5479dbff12c3eb33b9d26107

# Returns a flattened version of all elements in the array.  Same as Array.flatten
def my_flatten(arr)
  result = []

  arr.each do |elem|
    if elem.kind_of?(Array)
      result.concat(my_flatten(elem))