package hw1;

import java.util.TreeMap;

public class HW1 { /** * Inverts an array of Strings by returning a TreeMap that maps Strings to the smallest index in the array that contains the String. * * @param a an array of Strings * @return a Map that given a String returns the smallest index of the array that contains the String * (or null if String is not in the array a). */ public static TreeMap invert(String[] a) { //TO DO return null; } /** * Computes the total number of occurrences of every String in an array. * * @param a an array of Strings * @return a Map that given a String returns the number of occurrences of that String in the array * (or null if String is not in the array a). */ public static TreeMap count(String[] a) { // TODO return null; } }