Predicate functions
- Higher-order functions often just want to work with a yes/ no function
- Functions that return a boolean (true/ false) are often called predicate functions
- Predicate functions often end with a question mark
- You've already seen
even?
(remove even? [1 2 3 4 5 6]) ;=> (1 3 5)
(defn less-than-10? [x] (< x 10))
(filter less-than-10? [8 9 10 11]) ;=> (8 9)
Write a predicate function
Write a function that returns either true or false, based on a given argument (or multiple arguments)
()