static public IReadOnlyDictionary <TKey, TValue> AddOrUpdateWithTransform <TKey, TValue>(this IReadOnlyDictionary <TKey, TValue> _this, TKey key, TValue value, Func <TValue, TValue> oxTransform, IEqualityComparer <TKey> comparer)
where TKey : struct
{
var res = _this.Get(key, comparer);
if (!res.Exists)
{
return(_this.AddOrUpdate(key, value, comparer));
}
else
{
var newVal = oxTransform(res.Value);
return(_this.AddOrUpdate(key, newVal, comparer));
}
}
static public IReadOnlyDictionary <TKey, TValue> AddOrUpdateIf <TKey, TValue>(this IReadOnlyDictionary <TKey, TValue> _this, TKey key, TValue value, Predicate <TValue> oxUpdateIf, IEqualityComparer <TKey> keyComparer)
where TKey : struct
{
var res = _this.Get(key, keyComparer);
if (!res.Exists)
{
return(_this.AddOrUpdate(key, value, keyComparer));
}
else
{
if (!oxUpdateIf(res.Value))
{
return(_this);
}
else
{
return(_this.AddOrUpdate(key, value, keyComparer));
}
}
}
