Sergii Lagutin sergiilagutin

sergiilagutin / ModifyString.scala

Created January 22, 2018 10:12

	val str = "first string"

	val field = classOf[String].getDeclaredField("value")
	field.setAccessible(true)
	val value = field.get(str).asInstanceOf[Array[Char]]
	value(0) = 'W'
	value(1) = 'o'
	str // "Worst string"

sergiilagutin / future.scala

Created August 17, 2016 14:55

	import scala.concurrent.ExecutionContext.Implicits.global
	import scala.concurrent.Future

	def future1(): Future[Int] = ???
	def future2(): Future[Int] = ???

	val z1 = for {
	x <- future1()
	y <- future2()
	} yield x + y

sergiilagutin / Stream.java

Created June 9, 2016 07:36

	LongStream.range(0, users.size())
	.mapToObj(this::createUserOrder)
	.forEach(dao::save);

sergiilagutin / integration.hs

Created March 9, 2016 17:58

Trapezoidal rule

	integration :: (Double -> Double ) -> Double -> Double -> Double
	integration f a b = let
	step = (b-a)/1000
	helper acc 0 x = acc
	helper acc cnt x =
	helper (acc + ((f x) + (f next))/2 * step) (cnt - 1) next
	where next = x + step
	in helper 0 1000 a

sergiilagutin / custom-sorting.js

Created July 22, 2015 06:28

Custom sorting using datatables.js

	// sort data in column using string representation on numeric values
	// natural order: 1, 3, 2, 0

	$(function () {
	$.fn.dataTable.ext.order['my-sort'] = function (settings, col) {
	return this.api().column(col, {order: 'index'}).nodes().map(function (td, i) {
	var text;
	switch ($(td).text()) {
	case "0":
	text = "zero";

sergiilagutin / worksheet.scala

Created March 16, 2015 06:18

Simple reduce

	import scala.annotation.tailrec

	def sum(numbers: Seq[Int]): Int =
	loopRight(numbers, 0, _ + _)

	def product(numbers: Seq[Int]): Int =
	loopRight(numbers, 1, _ * _)

	def sumTail(numbers: Seq[Int]): Int =
	loopLeft(numbers, 0, (acc, i) => acc + i)

sergiilagutin / Runner.java

Created March 12, 2015 18:40

Force ConcurrentModificationException in single-thread application

	import java.util.*;

	List<String> list = new ArrayList<>();
	list.add("one");
	list.add("two");
	for( String str : list) {
	System.out.println(str);
	list.add("three")
	}

sergiilagutin / Runner.java

Created March 11, 2015 11:06

Java creation of new object

sergiilagutin / Factorial.scala

Created March 9, 2015 06:29

Scala factorial using TDD

sergiilagutin / Factorial.java

Created March 9, 2015 06:19

Java factorial using TDD