Skip to content

Instantly share code, notes, and snippets.

@mzuvin
Created March 20, 2021 10:25
Show Gist options
  • Save mzuvin/25f9e21678e0758c7983a153512a5cab to your computer and use it in GitHub Desktop.
Save mzuvin/25f9e21678e0758c7983a153512a5cab to your computer and use it in GitHub Desktop.
ChangeTracker
//https://stackoverflow.com/a/65642075/9218468
using System;
using System.Collections.Generic;
using System.Linq;
namespace ChangeTracker
{
public class ChangeTracker<T1, T2>
{
private readonly IEnumerable<T1> oldValues;
private readonly IEnumerable<T2> newValues;
private readonly Func<T1, T2, bool> areEqual;
public ChangeTracker(IEnumerable<T1> oldValues, IEnumerable<T2> newValues, Func<T1, T2, bool> areEqual)
{
this.oldValues = oldValues;
this.newValues = newValues;
this.areEqual = areEqual;
}
public IEnumerable<T2> AddedItems
{
get => newValues.Where(n => oldValues.All(o => !areEqual(o, n)));
}
public IEnumerable<T1> RemovedItems
{
get => oldValues.Where(n => newValues.All(o => !areEqual(n, o)));
}
public IEnumerable<T1> UpdatedItems
{
get => oldValues.Where(n => newValues.Any(o => areEqual(n, o)));
}
}
class Program
{
static bool AreEqual(string a, string b)
{
if (a == null && b == null)
return true;
if (a == null || b == null)
return false;
return a == b;
}
static void Main(string[] args)
{
List<string> list = new List<string>();
list.Add("mustafa");
list.Add("demozart");
List<string> list2 = new List<string>();
list2.Add("demozart");
list2.Add("oguz");
var changesTracker = new ChangeTracker<string, string>(list, list2,AreEqual);
Console.WriteLine("Eklenen");
Console.WriteLine(String.Join(", ", changesTracker.AddedItems));
Console.WriteLine("Değişen");
Console.WriteLine(String.Join(", ", changesTracker.UpdatedItems));
Console.WriteLine("Silinen");
Console.WriteLine(String.Join(", ", changesTracker.RemovedItems));
}
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment