CODEWITHSUNDEEP
ruby
ardavis
ardavis

Reputation: 9895

Merge Ruby Arrays into Multidimensional Array

What is the best way to merge the following two arrays into a multidimensional array?

x = ['A', 'B', 'C']
y = ['D', 'E', 'F']

Desired result:

z = [['A', 'D'], ['A', 'E'], ['A', 'F'], ['B', 'D'], ['B', 'E'], ['B', 'F'], ['C', 'D'], ['C', 'E'], ['C', 'F']]

Upvotes: 3

Views: 1204

Answers (3)

fmendez
fmendez

Reputation: 7338

Another way of doing it is like this: 

x = ['A', 'B', 'C']
y = ['D', 'E', 'F']

print x.concat(y).each_slice(2).to_a    # => [["A", "B"], ["C", "D"], ["E", "F"]]

Upvotes: 0

Chris Knadler
Chris Knadler

Reputation: 2847

You can use Array#product:

x = ['A', 'B', 'C']
y = ['D', 'E', 'F']

result = x.product(y)

puts result.inspect

Upvotes: 6

Jason Swett
Jason Swett

Reputation: 45074

Here's one way, although not necessarily the simplest possible way:

x = ['A', 'B', 'C']
y = ['D', 'E', 'F']

result = []

x.each do |x|
  y.each do |y|
    result << [x, y]
  end
end

puts result.inspect

Update: here's a more concise way:

x = ['A', 'B', 'C']
y = ['D', 'E', 'F']

puts x.map { |x|
  y.map { |y| [x, y] }
}.inspect

Upvotes: 2

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