#166
Comparisons
Difficulty: | Easy |
Topics: |
For any orderable data type it's possible to derive all of the
basic comparison operations (<, ≤, =, ≠, ≥, and >) from a single operation (any
operator but = or ≠ will work). Write a function that takes three arguments, a
less than operator for the data and two items to compare. The function should
return a keyword describing the relationship between the two items. The keywords
for the relationship between x and y are as follows:
x = y → :eq
x > y → :gt
x < y → :lt
(= :gt (__ < 5 1)) | |
(= :eq (__ (fn [x y] (< (count x) (count y))) "pear" "plum")) | |
(= :lt (__ (fn [x y] (< (mod x 5) (mod y 5))) 21 3)) | |
(= :gt (__ > 0 2)) |