DaHoC’s gists

DaHoC / RatingStarsTemplateRenderer.java

Last active January 22, 2025 12:52

Helper function to calculate 5 rating stars display (empty, half, full) based on an average rating value

	package com.kaput.portal.templaterenderer;

	import io.quarkus.qute.TemplateEnum;
	import io.quarkus.qute.TemplateExtension;

	@TemplateExtension
	public class RatingStarsTemplateRenderer {

	@TemplateEnum
	public enum StarStyleEnum {

DaHoC / pom.xml

Created January 30, 2023 12:25

Dependency conversion issue reproducer

	<?xml version="1.0" encoding="UTF-8"?>
	<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>org.example</groupId>
	<artifactId>SpringKafkaDependencyIssue</artifactId>
	<version>1.0-SNAPSHOT</version>

DaHoC / AsyncWaitForConditionWithCountDownLatch.java

Created January 6, 2023 13:01

AsyncWaitForConditionWithCountDownLatch

	/**
	* Generic method that properly awaits a given condition to become true within a given timeout.
	* This is superior to {@code sleep()} methods because it returns early when the condition is met.
	*
	* @param boolSupplier the supplier for evaluating the condition, should return {@code true} if condition is met, {@code false} otherwise
	* @param timeout timeout number
	* @param timeUnit timeout unit
	* @return {@code true} if condition is met within given time, {@code false} otherwise
	*/
	private boolean waitForCondition(final BooleanSupplier boolSupplier, long timeout, final TimeUnit timeUnit) {

DaHoC / IteratorToEnumeration

Last active February 16, 2023 07:50

	package com.kaput.littlehelper;

	import java.util.Enumeration;
	import java.util.Iterator;
	import java.util.NoSuchElementException;
	import java.util.Objects;

	/**
	* Helper class to be able to use a{@link Iterator} (i.e. {@link java.util.stream.Stream}) with {@link Enumeration}.
	* This can be useful, i.e.:

DaHoC / JUnitReportTestDurationPieChart.html

Created March 21, 2019 15:01

JUnit test reports (e.g. exported by Eclipse) overview of testsuite durations

	<html>
	<head>
	<title>JUnit Test Report Pie Chart over test durations</title>
	<meta content="">
	<style></style>
	<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
	<script type="text/javascript">
	// Load google charts
	google.charts.load('current', {'packages':['corechart']});
	// google.charts.setOnLoadCallback(drawChart);

DaHoC / BackpropagationOfError.tex

Created January 21, 2019 08:35

Derivation of "backpropagation of error" formula for a Multi-Layer-Perceptron, written in LaTeX

	\documentclass[10pt, a4paper]{article}

	\usepackage[english,ngerman]{babel}
	\usepackage{amsmath, amssymb, wasysym}
	\usepackage{textcomp}
	\usepackage{graphicx} % Graphics package
	%\usepackage{graphs} % c.f. http://www8.cs.umu.se/~drewes/graphs/
	\usepackage{tikz}
	\usepackage[T1]{fontenc}
	% \usepackage[latin9]{inputenc} % Encoding

DaHoC / testIpRange.php

Last active December 18, 2018 12:53

IP range check in PHP - This function checks if a given IP address is in a given IP range. It should be much more efficient than the ip2long / long2ip functions that come with PHP that can only be used for IPv4 and have polynomial costs

	<?php
	/*
	> CONTACT:
	Jan Hendriks
	http://www.gawe-design.de
	[email protected]
	> DESCRIPTION:
	The functions (you can also use them via php-include) checks if a given IP is in a given IP range
	These functions are much more efficient than the ip2long / long2ip functions from php that can only be used for IP v4 and have polynomial costs
	These functions are about O(number of positions), e.g. IP v.4: O(4); (I think)

DaHoC / PfOrderListConverter

Last active February 1, 2017 08:31

	import org.primefaces.component.orderlist.OrderList;

	import javax.faces.component.UIComponent;
	import javax.faces.context.FacesContext;
	import javax.faces.convert.Converter;
	import java.util.List;
	import java.util.Objects;

	/**
	* Generic converter for primefaces component (orderList).

DaHoC / PfPicklistConverter.java

Last active February 15, 2018 12:37

Primefaces Picklist converter

	import org.primefaces.component.picklist.PickList;
	import org.primefaces.model.DualListModel;

	import javax.faces.component.UIComponent;
	import javax.faces.context.FacesContext;
	import javax.faces.convert.Converter;
	import java.util.List;
	import java.util.Objects;

	/**

DaHoC / opencv_2class_boosting_example.cpp

Created September 8, 2015 09:56

Simple demo program showing how to use boosting in openCV

	/*
	* Simple demo program showing how to use boosted training in openCV
	* File: opencv_2class_boosting_example.cpp
	* Author: Jan Hendriks, [email protected], http://www.janhendriks.de
	*
	* Created on 18. August 2011, 13:55
	*/

	#include <cstdlib>
	#include "opencv/cv.h"

Jan Hendriks DaHoC