Bernhard Häussner bxt

Hey, I'm a developer working at @xing. I like functional programming.

bxt / ConsList.java

Created September 27, 2012 16:34

ConsList for Java, draft

	import java.util.AbstractList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;

	public class ConsList<E> extends AbstractList<E> implements List<E> {

	private E element;
	private List<E> parent;

bxt / once.js

Created September 8, 2012 08:38

JavaScript の once よくつかうので (I actually don't use it that often)

	function once (fn) {
	var done = false, result;
	function _once_ () {
	if(!done) {
	result = fn.apply(this,Array.prototype.slice.call(arguments))
	done = true;
	}
	return result;
	}
	return _once_;

bxt / webmsg.py

Created August 27, 2012 19:11

Really simple python web server to serve a maintenance message to the web

	import string,cgi,time, datetime
	from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer

	class MyHandler(BaseHTTPRequestHandler):
	def do_GET(self):
	try:
	self.send_response(503) # let bots know whats up
	self.send_header('Content-type','text/html')
	self.end_headers()
	self.wfile.write('<!DOCTYPE html>\n<meta charset=utf-8 />\n<title>Notification page</title>\n')

bxt / hextime.sh

Created July 22, 2012 13:18

Print the current time as 4 byte hex timestamp

	#!/bin/bash
	printf '0x%08x' $(date +%s)

bxt / Util.java

Created March 25, 2012 12:31

Java utility class for comparable and collections

bxt / bottom.java

Created March 22, 2012 09:43

Java generic "bottom" value

	public abstract class Bottom {
	public static <E> E get() {
	return null;
	}
	}

bxt / md2html

Created November 10, 2011 23:50

Bash script for invoking MarkdownJ to convert Markdown to HTML on CLI

	#!/bin/bash

	usestdi=off
	filename=$1
	if [ $1 = "-h" ] ; then
	echo "Usage: $0 mdfile [outfile]"; exit
	fi

	if [ $1 = "-" ] ; then
	usestdi=on

bxt / filename-utils.js

Created October 12, 2011 20:46

Javascript batch processing filename utilities


	/**
	* Return something as filename-save string.
	*
	* Result will contain only 0-9, a-z and "-".
	* It converts german umlauts, you might want
	* to add some conversions for your target
	* language.
	*/
	function filesc(str) {

bxt / percentage-mysql-avg.sql

Created September 29, 2011 17:57

MySQL - Calculate percentage of rows/records matching predicate using IF() and AVG

	-- Tip: You can use IF() and AVG() together to get a percentage value
	-- without doing subquerys
	-- -
	-- Basic usage:
	-- SELECT AVG(IF( predicate ,100,0)) as percentage FROM table
	-- Example:
	-- -
	SELECT
	AVG(IF(f.mid,100,0)) as `percentage filed`
	FROM

bxt / jquery-eventhacks.js

Created September 24, 2011 21:33

jQuery binding event handlers to non-DOM objects Javascipt code examples

	// This is a little demo File on how to bind event listeners
	// to own, non-DOM objects with jQuery.


	// Since calling the default action is calling the identically
	// named methods of our custom action and that would usually
	// mean triggering the event again we use this handy callback:
	function preventSelfcallCallback (event) {
	event.preventDefault();
	}