using System.Collections.Generic;

namespace HC
{
    public static class HCExtensions
    {
        public static void AddIfNotExists<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key, TValue value)
        {
            if (!dictionary.ContainsKey(key))
                dictionary.Add(key, value);
        }

        public static TValue GetValue<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key, TValue defalut)
        {
            return dictionary.TryGetValue(key, out var value) ? value : defalut;
        }
    }
}