ruby random from array code example

Example 1: ruby array randomly display

arr = [1, 2, 3, 4]

arr.sample # => 3 pick random number

arr.shuffle # => [3, 1, 4, 2]

Example 2: ruby randomize array

[1,2,3,4].shuffle => [2, 1, 3, 4]
[1,2,3,4].shuffle => [1, 3, 2, 4]