阪本先生 CattenLinger

CattenLinger / FastestResultPlayground.java

Last active April 24, 2025 18:01

To concurrently get only the fastest result with CompletableFuture in Java.

	import java.util.Random;
	import java.util.concurrent.*;

	public class FastestResultPlayground {
	static void sleep(long millis) {
	try {
	// Simulating a heavy job
	Thread.sleep(millis);
	} catch (Exception e) {
	throw new RuntimeException(e);

CattenLinger / SimpleQueryStatement.kt

Created June 14, 2021 15:59

Simple Kotlin Exposed transaction extension that executes string SQL queries.

	/**
	The SimpleQueryStatement enfoces the statement type to "SELECT". It's useful
	when using some special sql querys, such as sqlite3 query 'PRAGMA database_list;'.

	Usage:

	Like `Transaction.exec()`

	```
	val someValue = transaction {

CattenLinger / FibonacciIterator.kt

Created May 30, 2021 15:43

An iterator implementation that produces numbers from the Fibonacci sequence.

	import java.math.BigDecimal

	class FibonacciIterator : Iterator<BigDecimal> {
	var generations = 0L
	private set

	private var ancient = BigDecimal(0)
	private var parents = BigDecimal(1)

	override fun hasNext(): Boolean {

CattenLinger / Hexagram64.kt

Last active February 27, 2020 11:24

周易 BASE 六十四卦

	import java.io.ByteArrayOutputStream

	object Hexagram64 {
	private const val zero = '䷀'
	private const val nil = '⚋'

	fun parse(string: String): ByteArray = ByteArrayOutputStream(128).use { stream ->
	var count = 0
	var length = 0
	var data = 0

CattenLinger / CustomBaseNumber.kt

Created February 13, 2020 03:21

CustomBaseNumberKt

	package net.catten.demo

	import java.util.*
	import kotlin.math.abs

	private const val dummy = '_'
	private val codec = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toSet().toCharArray()
	private val base = codec.size

	private val max = Long.MAX_VALUE.toCustomBase()

CattenLinger / create_database_for_app.sh

Created October 26, 2019 15:46

A little script to creating database and user for application.

CattenLinger / JsonCat.kt

Created December 26, 2018 19:24

JsonCat - Tool for json flatten

	package net.catten.json.huge.extractor.complex

	import com.fasterxml.jackson.databind.JsonNode
	import com.fasterxml.jackson.databind.node.JsonNodeType
	import java.util.*
	import kotlin.collections.ArrayList

	class JsonCat {

	fun extractJson(jsonNode: JsonNode): List<JsonKnot> {

CattenLinger / bootstrap.tiny.css

Created June 19, 2018 07:48

Bootstrap3-like homebrew grid system

	/*
	Author : https://www.cnblogs.com/kidney/p/5351133.html

	*/

	* {
	-webkit-box-sizing: border-box;
	-moz-box-sizing: border-box;
	box-sizing: border-box;
	}

CattenLinger / MySQLNDB7Dialect.java

Created June 12, 2018 02:35

MySQL Dialect for NDB7 Engine

	import org.hibernate.dialect.MySQL5Dialect;

	public class MySQLNDB7Dialect extends MySQL5Dialect {

	@Override
	public boolean supportsCascadeDelete() {
	return true;
	}

	@Override

CattenLinger / BaseJsonAttributeConverter.java

Created May 31, 2018 05:17

Base Json Attribute Converter for JPA

	package com.shinonometn.iot.commons.database;

	import com.fasterxml.jackson.core.JsonProcessingException;
	import com.fasterxml.jackson.databind.JavaType;
	import com.fasterxml.jackson.databind.ObjectMapper;
	import com.fasterxml.jackson.databind.ObjectReader;
	import com.fasterxml.jackson.databind.ObjectWriter;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;