Amdocs Coding Question | Return Map | Count Frequency of each word in String

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Return Map or HashMap

In this task you will get an array of string that contains words, you are required to return a map which will contain each unique word as a key, and the number of occurrences of each word as a value.\n\nFor example:

Given the following array of string:

"hello", "world", "this", "is", "this", "hello"

you will return:

{'hello': 2, 'world': 1, 'this': 2, 'is': 1} 

Example :-

• Input:
  • "hello", "world", "this", "is", "this", "hello"
• Output:
  • {'hello': 2, 'world': 1, 'this': 2, 'is': 1} 

Explanation:-

Frequency of hello is 2, world is 1 , this is 2  etc

Code in Python

# Code in Python
class TestImpl:
    def hashMap(self, listString):
        mydict = {}
        for i in listString:
            if (mydict._contains_(i)):
                mydict[i] = mydict[i] + 1;
            else:
                mydict[i] = 1;
        print(mydict)


obj = TestImpl()
obj.hashMap(["hello", "world", "this", "is", "this", "hello"])

"""
{'hello': 2, 'world': 1, 'this': 2, 'is': 1}
"""

Code in Java

import java.util.HashMap;
import java.util.Scanner;

class Range {

    static HashMap ReturnHashMap(String ar[]) {
        HashMap<String, Integer> map = new HashMap<>();
        for (int i = 0; i < ar.length; i++) {
            if (!map.containsKey(ar[i])) {
                for (int j = 0; j < ar.length; j++) {
                    if (ar[i] == ar[j]) {
                        if (map.containsKey(ar[i])) {
                            map.put(ar[i], map.get(ar[i]) + 1);
                        } else {
                            map.put(ar[i], 1);
                        }
                    }
                }
            }
        }
        return map;
    }

    public static void main(String[] args) {
        String arr[] = {"hello", "world", "this", "is", "this", "hello"};
        HashMap<String, Integer> map = new HashMap<>();
        map = ReturnHashMap(arr);
        System.out.println(map);
    }
}
/*
OUTPUT
{world=1, this=2, is=1, hello=2}
 */

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