Victor Baybekov buybackoff

buybackoff / RLSEF.R

Created December 9, 2016 16:46

Recursive Least Squares with Exponential Forgetting

	RLSF <- function(y,x,alpha=0.95,ist=30,xpxi=NULL,xpy0=NULL)
	{
	# http://queue.acm.org/detail.cfm?id=2534976
	if(!is.matrix(x))x=as.matrix(x)
	nT=dim(x)[1]
	k=dim(x)[2]
	xpx0 = NULL
	#
	if(is.null(xpxi)){
	if(ist <= k)ist=k+1

buybackoff / gist:e7ceb018e983df1b1573

Last active August 29, 2015 14:23

F# Fast Events

	namespace Test

	open System
	open System.Linq
	open System.Linq.Expressions

	//thanks to http://v2matveev.blogspot.ru/2010/06/f-performance-of-events.html

	// helper type that will perform invocation
	type internal Invoker<'D, 'A> = delegate of 'D * obj * 'A -> unit

buybackoff / C# test via PInvoke

Last active January 2, 2020 17:58

LE query micro benchmark

	[Test]
	public void CursorShouldGetLessOrEqual() {

	_db = _txn.OpenDatabase(flags: DbFlags.None);
	var db2 = _txn.OpenDatabase("test_le",
	DbFlags.Create \| DbFlags.IntegerKey);

	using (var cur = _txn.CreateCursor(db2)) {

	int[] keys = new int[10000000];

buybackoff / OrderedDictionary<TKey, TValue>

Last active December 14, 2015 08:49

Generic OrderedDictionary<TKey, TValue> See http://stackoverflow.com/a/15146898/801189 for details.

	using System;
	using System.Collections;
	using System.Collections.Generic;
	using System.Linq;

	namespace Data
	{
	[Serializable]
	public class OrderedList<TKey, TValue> : IDictionary<TKey, TValue>, IDictionary
	{