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C# C# Collections Sets and Dictionaries Using Dictionaries

Posted by tafadzwa manzunzu
tafadzwa manzunzu
3,601 Points

please help

Create a method named WordsWithCountGreaterThan that takes an integer as a parameter. The method should return a dictionary of all of the words that have a count greater than the parameter passed in. The dictionary should contain the word and the word's count.

LexicalAnalysis.cs 
using System.Collections.Generic;

namespace Treehouse.CodeChallenges
{
    public class LexicalAnalysis
    {
        public Dictionary<string, int> WordCount = new Dictionary<string, int>();

        public void AddWord(string word)
        {
            if (WordCount.ContainsKey(word))
            {
                WordCount[word]++;
            }
            else
            {
                WordCount.Add(word, 1);
            }
        }
            public Dictionary<string, int> WordsWithCountGreaterThan(int i)
            {
                  WordCount = WordCount.Where(p => p.Value > i).ToDictionary(p => p.Key, p => p.Value);
                 return WordCount;

            }

        }
    }

4 Answers

Allan Clark
Allan Clark
10,810 Points
Allan Clark
Allan Clark
10,810 Points

Try adding this to the top

using System.Linq;
Samuel Ferree
Samuel Ferree
31,722 Points
Samuel Ferree
Samuel Ferree
31,722 Points

You're modifying your classes member dictionary in your getter. When that method is called, it doesn't just find the words, it removes all the other ones from your word counter. This might be messing with multiple calls to the method when the program tries to test it. Try assigning the results to a local variable, or returning in place

Local Variable Example

public Dictionary<string, int> WordsWithCountGreaterThan(int i)
{
  Dictionary<string, int> results = WordCount.Where(p => p.Value > 1).ToDictionary(p => p.Key, p => p.Value);
  return results;
}

Return In Place Example

public Dictionary<string, int> WordsWithCountGreaterThan(int i)
{
  return WordCount.Where(p => p.Value > 1).ToDictionary(p => p.Key, p => p.Value);
}
Matthew Miles
Matthew Miles
13,770 Points
Matthew Miles
Matthew Miles
13,770 Points

// this method will compare a dictionary item's value against a passed in integer, and build a new dictionary of those // keys with values greater than the passed in integer.

    Dictionary<string, int> returnedDictionary = new Dictionary<string, int>();

    public Dictionary<string, int> WordsWithCountGreaterThan(int numberOfWords)
    {
        foreach (KeyValuePair<string, int> code in WordCount)
        {
            if (code.Value > numberOfWords)
            {
                returnedDictionary.Add(code.Key, code.Value);


            }

        }
        return returnedDictionary;
    }
Kevin Gates
Kevin Gates
15,053 Points
Kevin Gates
Kevin Gates
15,053 Points

This works. Let me know if you have any questions:

using System.Collections.Generic;

namespace Treehouse.CodeChallenges
{
    public class LexicalAnalysis
    {
        public Dictionary<string, int> WordCount = new Dictionary<string, int>();

        public void AddWord(string word)
        {
            try
            {
                WordCount.Add(word, 1);
            }
            catch
            {
                WordCount[word] +=1;
            }
        }

        public Dictionary<string,int> WordsWithCountGreaterThan(int count)
        {
            var resultSet = new Dictionary<string,int>();
            foreach(KeyValuePair<string, int> entry in WordCount)
            {
                if ( entry.Value > count)
                {
                    resultSet.Add(entry.Key,entry.Value);
                }
            }
            return resultSet;
        }
    }
}