Ruby - Array multiplication or JOIN operation

Question

I have two arrays,

a = [1, 2]
b = [:a]

I want to get the result as

[[1, :a], [2, :a]]

Is there any methods for this?

Answer 1

Use the Array#product:

a = [1, 2]
b = [:a]
a.product(b)
=> [[1, :a], [2, :a]]