بهینه سازی عملیات جمع آوری در C#: واردات ، جستجو و مرتب سازی

public class Country
{
    public string Name { get; set; }
    public string Code { get; set; }
    public string Continent { get; set; }

    public override string ToString()
    {
        return $"{Name} ({Code}) - {Continent}";
    }
}

var countries = new List<Country>
{
    new Country { Name = "Germany", Code = "DEU", Continent = "Europe" },
    new Country { Name = "United States", Code = "USA", Continent = "North America" },
    new Country { Name = "India", Code = "IND", Continent = "Asia" },
    new Country { Name = "Malta", Code = "MLT", Continent = "Europe" },
    new Country { Name = "Japan", Code = "JPN", Continent = "Asia" }
};

public static Country GetCountryWithCode(string code, List<Country> countries)
{
    if (code.Length != 3) return null; // Validate input length

    return countries.Find(c => c.Code.Equals(code, StringComparison.OrdinalIgnoreCase));
}

var country = GetCountryWithCode("IND", countries);
if (country != null)
{
    Console.WriteLine($"Found: {country}");
}
else
{
    Console.WriteLine("Country not found.");
}

var countryDict = countries.ToDictionary(c => c.Code);

public static Country GetCountryWithCode(string code, Dictionary<string, Country> countryDict)
{
    countryDict.TryGetValue(code.ToUpper(), out var country);
    return country;
}

var optimizedCountry = GetCountryWithCode("USA", countryDict);
if (optimizedCountry != null)
{
    Console.WriteLine($"Found: {optimizedCountry}");
}
else
{
    Console.WriteLine("Country not found.");
}

var sortedCountries = countries.OrderBy(c => c.Name).ToList();

Console.WriteLine("Sorted Countries:");
foreach (var country in sortedCountries)
{
    Console.WriteLine(country);
}

using System;
using System.Collections.Generic;
using System.Linq;

public class Country
{
    public string Name { get; set; }
    public string Code { get; set; }
    public string Continent { get; set; }

    public override string ToString()
    {
        return $"{Name} ({Code}) - {Continent}";
    }
}

class Program
{
    static void Main()
    {
        // Step 2: Populate the collection
        var countries = new List<Country>
        {
            new Country { Name = "Germany", Code = "DEU", Continent = "Europe" },
            new Country { Name = "United States", Code = "USA", Continent = "North America" },
            new Country { Name = "India", Code = "IND", Continent = "Asia" },
            new Country { Name = "Malta", Code = "MLT", Continent = "Europe" },
            new Country { Name = "Japan", Code = "JPN", Continent = "Asia" }
        };

        // Step 3: Search with linear search
        var country = GetCountryWithCode("IND", countries);
        Console.WriteLine(country != null ? $"Found: {country}" : "Country not found.");

        // Step 4: Optimize search with dictionary
        var countryDict = countries.ToDictionary(c => c.Code);
        var optimizedCountry = GetCountryWithCode("USA", countryDict);
        Console.WriteLine(optimizedCountry != null ? $"Found: {optimizedCountry}" : "Country not found.");

        // Step 5: Sort the collection
        var sortedCountries = countries.OrderBy(c => c.Name).ToList();
        Console.WriteLine("Sorted Countries:");
        foreach (var sortedCountry in sortedCountries)
        {
            Console.WriteLine(sortedCountry);
        }
    }

    public static Country GetCountryWithCode(string code, List<Country> countries)
    {
        if (code.Length != 3) return null;
        return countries.Find(c => c.Code.Equals(code, StringComparison.OrdinalIgnoreCase));
    }

    public static Country GetCountryWithCode(string code, Dictionary<string, Country> countryDict)
    {
        countryDict.TryGetValue(code.ToUpper(), out var country);
        return country;
    }
}