Challenge: Filtering with Higher-Order Functions

Problem statement

Make a function Filter which accepts s as the first parameter and a function fn func(int) bool as the second parameter. The Filter should return a slice of the elements of s which fulfill the function fn (make it true). Test this out with fn testing if the integer is even.

Input

A slice and the function name(use function that checks if the number is even or not)

Sample input

[0 1 2 3 4 5 6 7 8 9] // slice
even                  //function that checks if the number is even or not

Output

Slice containing even numbers only

Sample output

[0 2 4 6 8]

Try to implement the function below. Feel free to view the solution, after giving some shots. Good Luck!