Average Salary Excluding the Minimum and Maximum Salary

# 1491. Average Salary Excluding the Minimum and Maximum Salary

You are given an array of unique integers salary where salary[i] is the salary of the ith employee.

Return the average salary of employees excluding the minimum and maximum salary. Answers within 10-5 of the actual answer will be accepted.

### 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
 ```

Constraints:
```
3 <= salary.length <= 100
1000 <= salary[i] <= 106
All the integers of salary are unique.
```

/**
 * @param {number[]} salary
 * @return {number}
 */
var average = function(salary) {
    salary.sort((a, b) => a - b);
    let totalSalary = 0, employeeCount = salary.length - 2;
    for(let i = 1; i <= employeeCount; i++) {
        totalSalary += salary[i];
    }

    return totalSalary/employeeCount;

};