Question

If I have two ranges that overlap:

x = 1..10
y = 5..15

When I say:

puts x.include? y 

the output is:

false 

because the two ranges only overlap partially.

But if I want it to be “true” when there is partial overlap between two ranges, how would I write that? In other words I need a way to know when one range contains a subset of another range. I assume there’s an elegant way to write this in Ruby but the only solutions I can think of are verbose.

Answer 1

Be careful using this with large ranges but this is an elegant way to do it:

(x.to_a & y.to_a).empty?