The range kata in fsharp.
2 in range of 1..3 : green
4 not in range of 1..3 : green
1..4 intersect 2..5 = 2..4 : red
1..4 intersect 2..5 = 2..4 : green
touchdown. range kata in f# is great. it shows once more how concise and clean f# is.