Question

I have an array:

x = [1,2,3,4,5]

I want to get:

output = [1,2,6,24,120]

Hope you see the pattern and what I want to accomplish here. x[1] is
transformed into x[1]*x[0]. x[2] => x[2]*x[1]*x[0], etc.

What’s the most efficient way to do this in Ruby?

Answer 1

You can use e.g. the following code

a=1;output = x.map{|i|a*=i}