Inject each element of an array to a different array

Question

I have two arrays:

array1: [[1, 2], [2, 3]]

array2: ["a", "b", "c"]

I would like to combine those two and get the below result:

[[1, 2, "a"], [1, 2, "b"], [1, 2, "c"], [2, 3, "a"], [2, 3, "b"], [2, 3, "c"]]

Ernest · Accepted Answer · 2014-10-01 10:45:13Z

6

array1.product(array2).map &:flatten
#=> [[1, 2, "a"], [1, 2, "b"], [1, 2, "c"], [2, 3, "a"], [2, 3, "b"], [2, 3, "c"]]

Ernest

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answered Oct 1, 2014 at 10:28

BroiSatse

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Comments

Cary Swoveland · Accepted Answer · 2014-10-01 14:30:00Z

1

Array#product is purpose-built for this, but this is one alternative:

array2.flat_map { |e| array1.map { |arr| arr+[e] } }

answered Oct 1, 2014 at 14:30

Cary Swoveland

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