MG.Collections 1.0.0

Expanded Specialized Collections

GitHub Project Site

WPF library - MG.Collections.Wpf

Helper libraries that provide some collection classes that I use in my projects. Some examples include:

UniqueList<T>

• Same as System.Collections.Generic.List<T> but ensures that each element is unique according to a custom IEqualityComparer<T> or the default.

// input is: "test test Test"
using MG.Collections;
using System;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            var col = new UniqueList<string>(args);

            Console.WriteLine(col.Count); // outputs '1'
            Console.WriteLine(col[0]);    // outputs 'test'.
        }
    }
}

ManagedKeySortedList<TKey, TValue>

• Similar to System.Collections.Generic.SortedList<TKey, TValue>. The difference is that the 'key' is retrieved from an incoming object using a specified Func<TValue, TKey> function defined in the constructor. Elements can be added then, and the 'key' will be retrieved automatically from it.

• The other difference is that the default enumerator for this collection uses the simple List enumerator instead of a Dictionary one.

// input is: 1 2 87 2 "what up"
using MG.Collections;
using System;
using System.Collections;
using System.Collections.Generic;

namespace Test
{
    class Program
    {
        static void Main(string[] args)
        {
            var sortedList = new ManagedKeySortedList<int, StringInt>(x => x.IntValue);

            Array.ForEach((a) => {
                sortedList.Add(a);
            });

            Console.WriteLine(sortedList.Count); // outputs '4'
        }
    }

    struct StringInt
    {
        public int IntValue;
        public string StrValue;

        public static implicit operator StringInt(string parsingStr)
        {
            int intVal = -1;
            if (int.TryParse(parsingStr, out int tryInt))
            {
                intVal = tryInt;
            }

            return new StringInt
            {
                IntValue = intVal,
                StrValue = parsingStr
            };
        }
    }
}

ReadOnlyList<T> & ReadOnlySet<T>

• A List and a Set readonly wrapper (similiar to System.Collections.ObjectModel.ReadOnlyCollection<T>) exposing only the 'readonly' methods of the corresponding collection types.

  • *NOTE* - In .NET5 projects, ReadOnlySet<T> implements System.Collections.Generic.IReadOnlySet<T>. All other target frameworks, it implements a custom MG.Collections.IReadOnly<T>.