Picking random element from an array in Ruby ONCE ONLY

Question

I know I can pick a random element out of an array with the sample method but this leaves the possibility of an element being picked more than once. I could shuffle the array first and then go from first to last element in order but I understand this is memory intensive and I am looking for a less intensive method if possible!

Answer 1

sample takes an argument:

[*(1..10)].sample(5) #=>[3, 4, 1, 8, 9] 

No element will be selected twice.