i tray many code and nothing solve

Question

in this i tray many code but no one work i use tray cach , if , remove but nothing work

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["rock"] > 0)
                 {
                     WordCount.Remove("rock");
                     WordCount.Add("rock",2);
                 }
        }
    }
}

Answer 1 · 2018-01-22T22:02:48Z

January 22, 2018 10:02pm

You won't need "try...catch" for this challenge. But there's three basic things your code needs to do:

check to see if the word is already in the dictionary (the "ContainsKey" method can be handy for this)
if it exists, increase the count it already has by 1
if it does not exist, add it with a count of 1

Answer 2 · 2018-01-22T20:25:00Z

January 22, 2018 8:25pm

You are trying to check a key-value pair that you have not added to the dictionary yet. I get this error if I run your code.

Unhandled Exception: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary. at System.Collections.Generic.Dictionary`2.get_Item(TKey key)

To check a dictionary you first have to add something to it

have a look at my console app.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        public static Dictionary<string, int> WordCount = new Dictionary<string, int>();
        public static void Main(string[] args)
        {
            WordCount.Add("rock", 1);
            AddWord("rock");
        }

    public static void AddWord(string word)
    {

        if (WordCount[word] > 0)
        {
            WordCount.Remove(word);
            WordCount.Add(word, 2);
        }
    }
}

}

As you can see i added the first key-value pair then i was able to check it.

Answer 3 · 2018-01-23T10:32:17Z

January 23, 2018 10:32am

im not trying to give the answer for the solution. i simply demonstrated where his code is going wrong. It is perfectly correct.

firstly he did not post what the challenge was asking for. secondly i identified the exception occurring - so he can learn to figure problems out for himself. thirdly i identified the work he was trying to check to see if it was greater than zero did not exist in the first place. fourth and finally i used a console app because it was easier for me to work it out and demonstrate these simple points.

Why not try teaching someone how to learn to problem solve that solving the problem for them? (Moderator redacted)

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Mohamed Monir

Mohamed Monir

i tray many code and nothing solve

3 Answers

Steven Parker

Steven Parker

Stephen Mooney

Stephen Mooney

Steven Parker

Steven Parker

Mohamed Monir

Mohamed Monir

Stephen Mooney

Stephen Mooney

Steven Parker

Steven Parker

Jennifer Nordell

Jennifer Nordell