Check out example codes for "how to add to array ruby". It will help you in understanding the concepts better.

Code Example 1

a = [ "a", "b", "c" ]
a.push("d", "e", "f")
        #=> ["a", "b", "c", "d", "e", "f"]
[1, 2, 3].push(4).push(5)
        #=> [1, 2, 3, 4, 5]

Learn ReactJs, React Native from akashmittal.com