LeetCode： Average Salary Excluding the Minimum and Maximum Salary

Question

Given an array of unique integers salary where salary[i] is the salary of the employee i.

Return the average salary of employees excluding the minimum and maximum salary.

Example 1:

Input: salary = [4000,3000,1000,2000]

Output: 2500.00000

Explanation: Minimum salary and maximum salary are 1000 and 4000 respectively.

Average salary excluding minimum and maximum salary is (2000+3000)/2= 2500

Example 2:

Input: salary = [1000,2000,3000]

Output: 2000.00000

Explanation: Minimum salary and maximum salary are 1000 and 3000 respectively.

Average salary excluding minimum and maximum salary is (2000)/1= 2000

Solution

def average(salary)
  salary.delete(salary.min)
  salary.delete(salary.max)
  salary.reduce(0.0){ |sum, num| sum + num }.to_f / salary.size
end