Alexander Radzin alexradzin

alexradzin / Initialization.java

Created October 31, 2021 08:28

Variables initialization

	import java.util.AbstractMap;
	import java.util.Arrays;
	import java.util.Collections;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.LinkedHashMap;
	import java.util.LinkedHashSet;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;

alexradzin / Insert.java

Created November 21, 2021 07:10

Insert rows to a database using regular and prepared statement utilizing one-by-one and batch mode

+package org.jdbc.test;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.sql.Statement;
+import static java.lang.String.format;
+public class Insert {

alexradzin / SortedJoiningIterator.java

Created June 9, 2022 15:52

iterator (Iterator<T>) that produces globally sorted sequence from the given N iterators

	package com.exercise;

	import java.util.Comparator;
	import java.util.Iterator;
	import java.util.List;
	import java.util.NoSuchElementException;
	import java.util.PriorityQueue;

	public class SortedJoiningIterator<T> implements Iterator<T> {
	private final PriorityQueue<Head<T>> iterators;

alexradzin / ExchangeRate.java

Created June 9, 2022 16:16

	package com.exercise;

	import com.fasterxml.jackson.annotation.JsonCreator;
	import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
	import com.fasterxml.jackson.annotation.JsonProperty;

	import java.util.Map;

	@JsonIgnoreProperties(ignoreUnknown = true)
	public class ExchangeRate {

alexradzin / TaskTest.java

Last active June 12, 2022 13:51

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

	package com.alexr.exercise;


	import org.junit.jupiter.api.Test;

	import java.util.Collection;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;
	import java.util.Optional;

alexradzin / Twitter.java

Created June 15, 2022 12:47

Trivial twitter implementation

	package com.sunbit;

	import java.util.Collection;
	import java.util.HashMap;
	import java.util.LinkedList;
	import java.util.List;
	import java.util.Map;
	import java.util.Optional;
	import java.util.stream.Collectors;
	import java.util.stream.Stream;

alexradzin / git-more.sh

Created August 4, 2022 07:46

Script that iterates over git revisions from oldest to the newest in current branch

	#!/bin/sh

	pressAnyKey="Press any key to continue"
	pressAnyKeySpaces=`echo $pressAnyKey \| sed 's/./ /g'`
	(git log --pretty="format:%H %s"; echo) \| tac \| while read line; do
	hash=`echo $line \| cut -d' ' -f1`;
	message=`echo $line \| cut -d' ' -f2-`;
	git checkout -q $hash;
	echo $message;
	printf "$pressAnyKey\r"

alexradzin / Bird.java

Created February 22, 2023 09:45

Evaluator: alternative to the Visitor pattern

	package visitoralternative;

	public interface Bird {
	}

alexradzin / binarygap.java

Created March 21, 2023 12:36

Codility:BinaryGap

alexradzin / CyclicRotation.java

Created March 21, 2023 13:08

Codility:CyclicRotation

	class CyclicRotation {
	public int[] solution(int[] a, int k) {
	int res[] = new int[a.length];
	for (int i = 0; i < a.length; i++) {
	int j = (i + k) % a.length;
	res[j] = a[i];
	}
	return res;
	}
	}