// Homework 1: Finger Exercises
// Due January 31, 2017 at 11:59pm
package main

import "fmt"

func main() {
	// Feel free to use the main function for testing your functions
	fmt.Println("Hello, دنيا!")
}

// ParsePhone parses a string of numbers into the format (123) 456-7890.
// This function should handle any number of extraneous spaces and dashes.
// All inputs will have 10 numbers and maybe extra spaces and dashes.
// For example, ParsePhone("123-456-7890") => "(123) 456-7890"
//              ParsePhone("1 2 3 4 5 6 7 8 9 0") => "(123) 456-7890"
func ParsePhone(phone string) string {
	// TODO
	return ""
}

// Anagram tests whether the two strings are anagrams of each other.
// This function is NOT case sensitive and should handle UTF-8
func Anagram(s1, s2 string) bool {
	// TODO
	return false
}

// FindEvens filters out all odd numbers from input slice.
// Result should retain the same ordering as the input.
func FindEvens(e []int) []int {
	// TODO
	return nil
}

// SliceProduct returns the product of all elements in the slice.
// For example, SliceProduct([]int{1, 2, 3}) => 6
func SliceProduct(e []int) int {
	// TODO
	return 0
}

// Unique finds all distinct elements in the input array.
// Result should retain the same ordering as the input.
func Unique(e []int) []int {
	// TODO
	return nil
}

// InvertMap inverts a mapping of strings to ints into a mapping of ints to strings.
// Each value should become a key, and the original key will become the corresponding value.
// For this function, you can assume each value is unique.
func InvertMap(kv map[string]int) map[int]string {
	// TODO
	return nil
}

// TopCharacters finds characters that appear more than k times in the string.
// The result is the set of characters along with their occurrences.
// This function MUST handle UTF-8 characters.
func TopCharacters(s string, k int) map[rune]int {
	// TODO
	return nil
}