Help with code implementation - HashSet

Question

This exercise I don't quite understand how I should do it. I can insert a foreach that goes through the names with a Key and later implement an If Else statement, it can be with a ternary operator and finally implement an IsSubsetOf to return true if the hash set is a superset of the specified collection.

The exercise mentions the following:
We are hiring programmers on our team. There are 10 candidates, and we need to choose 3 of them.
In the program you are given, you have 10 candidates in a hash set. You need to take 3 names as input, add them to a new hash set and check if they are present in our candidate set.
If they are, the program should generate "Starting hiring process", otherwise "Something is wrong".

Input example
John
Susan
Daniel

Output example
Starting hiring process

I need help with this exercise.

This is the code:

https://code.sololearn.com/cfYUaGlwlfGm/?ref=app

Answer 1

https://code.sololearn.com/cJSOlwkCnjB8/?ref=app

Answer 2

Alex Narváez ,

ok - i got it thanks.

what you need to do is:

▪︎ inside the existing while loop you have to add each of the 3 inputs to the HashSet < hiring >
▪︎after this you have to check if HashSet < hiring > is a subset of HashSet < candidates > or not

happy coding and good success!

Answer 3

Alex Narváez ,

please give us a hint about the tutorial name and the number of lesson.

thanks!

Answer 4

If it requires all 3 to be present in candidates set , then maybe use IntersectWith on Input set and check if count is still 3 for it , otherwise use IsSubsetOf !

Answer 5

Alex Narváez

You already have a HashSet hiring so don't make another HashSet. Just add input in hiring.

Btw if you make new HashSet inside loop then on every iteration new HashSet will create.

So you have wrongly created new HashSet inside loop so remove that and just add items in HashSet hiring.

Answer 6

visph Thank you very much for the help, that was what I was missing. Now I understand how to do it.

Answer 7

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

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
HashSet<string> candidates = new HashSet<string>();

candidates.Add("John");
candidates.Add("Amelie");
candidates.Add("Tom");
candidates.Add("Richard");
candidates.Add("Barbara");
candidates.Add("Susan");
candidates.Add("Charles");
candidates.Add("Daniel");
candidates.Add("Tamara");
candidates.Add("Donald");

HashSet<string> hiring = new HashSet<string>();

while (hiring.Count<3)
{
//add the recruiting names to the hash set

hiring.Add(Console.ReadLine());
}
//your code goes here
if(hiring.IsSubsetOf(candidates))
{
Console.WriteLine("Starting hiring process");
} else {
Console.WriteLine("Something is wrong");
}
}
}
}

Answer 8

Lothar Module: Generics. Lesson: Dictionary and HashSet. Exercise: Hiring Engineers

Answer 9

Thanks for your answers, they have told me in theory how to do it, which is something I have in mind, however I am looking for a way to implement it in code, which is what they have not told me

Answer 10

Alex Narváez

You have a HashSet of candidates.
Now make another HashSet with name hiring and add all inputs in the new HashSet.

And then check new HashSet data in old HashSet data like this:

if(hiring.IsSubsetOf(candidates)) which will return true. If it is true then print "Starting hiring process"

Answer 11

Lothar give you all you have to do and I ᴀᴍ "Tɪᴍᴇ" give you the conditional to use...

don't forgot to add an else statement to print "Something is wrong"

Answer 12

I updated the code and so far I have what was recommended to me, however I need to correct some things. Can you help me, please

Answer 13

What do you think? visph

Answer 14

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

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
HashSet<string> candidates = new HashSet<string>();

candidates.Add("John");
candidates.Add("Amelie");
candidates.Add("Tom");
candidates.Add("Richard");
candidates.Add("Barbara");
candidates.Add("Susan");
candidates.Add("Charles");
candidates.Add("Daniel");
candidates.Add("Tamara");
candidates.Add("Donald");

HashSet<string> hiring = new HashSet<string>();

while (hiring.Count<3)
{
//add the recruiting names to the hash set

hiring.Add(Console.ReadLine());
}
//your code goes here
if(hiring.IsSubsetOf(candidates))
{
Console.WriteLine("Starting hiring process");
} else {
Console.WriteLine("Something is wrong");
}
}
}
}