using System;
using System.Collections.Generic;

namespace BITKit
{
    public static partial class Extensions
    {
        public static IDictionary<TKey, TValue> CreateOrAddIfEmety<TKey, TValue>(this IDictionary<TKey, TValue> self, TKey key, Func<TValue> createFactory)
        {
            if (self.ContainsKey(key) is false)
            {
                self.Add(key, createFactory.Invoke());
            }
            return self;
        }
    }
}