vs

gistfile1.cs

public Slice Get(Slice key, int transactionId = -1)
{
	var record = UseTransaction (transactionId, tr=>tr.Records.FindLast (r=> r.Key == key));	
	if (record != null) return record.Value;	
	
	var r = log.Get(key);
	if (v != null) return v;
	
	return InternalGet(key);
}

public Slice Get2(Slice key, int transactionId = -1)
{
	return Combine (key, 
		k => 
			{
				var record = UseTransaction (transactionId, tr=>tr.Records.FindLast (r=>r.Key == key));
				return record != null ? record.Value : null;
			},
		log.Get,
		InternalGet)
		
		.First();
}

public IEnumerable<T> Combine<T,TA>(TA arg, params Func<TA, T> funcs)
{
	foreach (var func in funcs)
	{
		yield return func(arg);
	}
}