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szabomarton 2024-12-06 11:19:07 +01:00
parent 97d51cdc15
commit affd565abf
20 changed files with 281 additions and 1 deletions
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Dict
{
internal class Program
{
static void Main(string[] args)
{
int[] szamok = new int[20];
Random R = new Random();
for (int i = 0; i < 20; i++)
{
szamok[i] = R.Next(10);
}
Dictionary<int,int> szamokSzama = new Dictionary<int,int>();
for (int i = 0; i < szamok.Length; i++)
{
if (szamokSzama.ContainsKey(szamok[i]))
{
szamokSzama[szamok[i]]++;
} else
{
szamokSzama.Add(szamok[i], 1);
}
}
foreach (KeyValuePair<int, int> item in szamokSzama)
{
Console.WriteLine($"Kulcs: {item.Key}, Érték: {item.Value}");
}
}
}
}

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using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
// General Information about an assembly is controlled through the following
// set of attributes. Change these attribute values to modify the information
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[assembly: AssemblyTitle("Dict")]
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[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("Dict")]
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//
// Major Version
// Minor Version
// Build Number
// Revision
//
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[assembly: AssemblyFileVersion("1.0.0.0")]

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// <autogenerated />
using System;
using System.Reflection;
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adatstrukturak
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@ -255,3 +255,27 @@ Hash funkciók
rögzített számjegyeket, és optimalizálja a tárhelyet.
A hash függvény célja egy kulcs létrehozása, amely a tárolni kívánt értékre hivatkozik.
A függvény elfogadja a mentendő értéket, majd egy algoritmus segítségével kiszámítja a kulcs értékét.
Dictionary
A szótár elempárok tárolására szolgál,
melyek közül egyik a kulcs, amely azonosítja az elempárt,
másik az érték, minden kulcs egyedi.
Gyakorlatilag a szótár úgy viselkedik,
mint egy lista, de az elemek indexe itt tetszőleges típusú lehet pl.: szöveg.
Konstruktora generikus, paraméter nélküli:
Dictionary<TKey, TValue>(): létrehoz egy szótárt, ahol Tkey a kulcs TValue az érték típusa.
A szótár elemei a [] operátorral érhetőek el.
A szótárat foreach ciklussal lehet végig olvasni, amellyel a szótárból KeyValuePair<Tkey, Tvalue>
típusú elemeket kapunk. Ezek Key value mezői adják a megfelelő kulcs és érték párokat.
Fő metódusai:
Add(TKey, TValue)
Bool ContainsKey(TKey)
Bool ContainsValue(TValue)
bool Remove(Tkey) // ha sikeres a művelet akkor true
int Count()
void Clear() szótár ürítése