Question

Generally, how can you determine how to iterate through an array based on a known pattern?

Specifically, this is the pattern I would like to iterate through, returning an array of arrays: (Each digit is an index value of the original array: [0, 1, 2, 3])

0

0,1

0,1,2

0,1,2,3

1

1,2

1,2,3

2

2,3

3

Answer 1

Here’s another more concise alternative:

a.size.times { |i| (a.size - i).times { |j| p a[i..j+i] } }