Ivan Kochurkin KvanTTT

Kotlin Compiler Developer (K2). Also, I do all these things.

KvanTTT / ManyStringConcatenation.java

Created October 20, 2015 17:07

ANTLR Java7.g4 very slow performance sample (~15 sec Java.g4 versus ~0.15 sec Java8.g4 even with two-stage parsing strategy).

KvanTTT / QuineClock.bat

Created July 12, 2015 16:34

QuineClock

	echo off

	:LOOP
	"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" "QuineClock.cs"
	"QuineClock.exe" > "QuineClock.cs"
	type "QuineClock.cs"
	goto LOOP

	:END

KvanTTT / QuineSnake.bat

Last active September 16, 2019 13:08

Game Snake in source code (Quine). One can play this with batch or power scripts. The game can be finished =)

	echo off

	:LOOP
	"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" "QuineSnake.cs"
	"QuineSnake.exe" > "QuineSnake.cs"
	type "QuineSnake.cs"
	goto LOOP

	:END

KvanTTT / AsciimationQuine_1_3.bat

Last active May 21, 2016 22:07

Result of generated quine with https://github.com/KvanTTT/Freaky-Sources

	echo off

	:LOOP
	"C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" "Asciimation_1_3.cs"
	"Asciimation_1_3.exe" > "Asciimation_1_3.cs"
	type "Asciimation_1_3.cs"
	goto LOOP

	:END

KvanTTT / PolygonTriangulator.cs

Created October 8, 2012 21:31

Short solution for splitting concave polygon on convex polygons or triangles with other utils (SelfIntersection checking).

	using System.Collections.Generic;
	using System.Drawing;

	public class PolygonTriangulator
	{
	/// <summary>
	/// Calculate list of convex polygons or triangles.
	/// </summary>
	/// <param name="Polygon">Input polygon without self-intersections (it can be checked with SelfIntersection().</param>
	/// <param name="triangulate">true: splitting on triangles; false: splitting on convex polygons.</param>

KvanTTT / PolynomialRegression.cs

Last active July 28, 2020 07:48

Implementation of Polynomial regression (http://en.wikipedia.org/wiki/Polynomial_regression) with Math.NET library (http://www.mathdotnet.com/)

	using MathNet.Numerics.LinearAlgebra.Double;
	using MathNet.Numerics.LinearAlgebra.Generic;

	public class PolynomialRegression
	{
	private int _order;
	private Vector<double> _coefs;

	/// <summary>
	/// Calculates polynom regression for xData = [x1, x2, ... , xn] and yData = [y1, y2, ... , yn].

KvanTTT / RationalNumberCounting.cs

Created September 22, 2012 09:04

Rational numbers counting (with inverse)

	public static long RationalNumber(long i, long j)
	{
	if (j == 1)
	{
	if (i == 0)
	return 1;
	else if (i == 1)
	return 2;
	}