CODEWITHSUNDEEP
rubyrecursion
arjis02
arjis02

Reputation: 75

Extract items from an array containing arrays with n-depth in Ruby

I'm trying to extract all the elements from an array such as this: [[42, 43, 46], [23,64], [2, [2,3]]]. I figured a recursive method approach would work, but recursion is a relatively new concept to me in Ruby. Is recursion the best solution or is there a better method? I was able to extract the first deepest item within the array with this method:

def list_items(array)
  return array if array.is_a? Integer
  array = array.shift
  list_items(array)
end

set = [[42,43,46],[23,64],[2,[2,3]]]
result = list_items(set)
p result

Upvotes: 0

Views: 51

Answers (1)

Arup Rakshit
Arup Rakshit

Reputation: 118261

Use #flatten method.

Returns a new array that is a one-dimensional flattening of self (recursively).

set = [[42,43,46],[23,64],[2,[2,3]]]
set.flatten # => [42, 43, 46, 23, 64, 2, 2, 3]

Upvotes: 1

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