Jarrod Roberson jarrodhroberson

jarrodhroberson / .gitconfig

Created August 22, 2015 06:08

Git Alias to remove local tag and remote tag in one command!

	[alias]
	rmtag = "!f() { git tag -d ${1}; git push origin :refs/tags/${1}; git tag; }; f"

jarrodhroberson / UrlBuilder.java

Last active July 29, 2018 18:48

	import com.google.common.base.Joiner;

	import javax.annotation.Nonnull;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.List;
	import java.util.Map;

	import static com.google.common.base.Preconditions.checkArgument;
	import static com.google.common.base.Preconditions.checkNotNull;

jarrodhroberson / TimeZoneInfo.java

Created July 21, 2015 19:56

Dump TimeZone Information with an example of the current time in ISO8601 FULL

	import java.text.SimpleDateFormat;
	import java.util.Date;
	import java.util.TimeZone;
	import javax.annotation.Nonnull;

	public class TimeZoneInfo
	{
	public static void main(@Nonnull final String[] args)
	{
	final SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssXXX");

jarrodhroberson / PipedInputOutputStreams.java

Created June 14, 2015 08:44

How to use PipedInputStream and PipedOutputStream

	import com.google.common.io.ByteStreams;

	import java.io.IOException;
	import java.io.InputStream;
	import java.io.PipedInputStream;
	import java.io.PipedOutputStream;

	public class PipedInputOutputStreams
	{
	public static void main(String[] args)

jarrodhroberson / Output.java

Last active August 29, 2015 14:22

Obfuscated String source code generator functions

final String bytes = new String(new byte[]{0x4a,0x61,0x72,0x72,0x6f,0x64}, Charsets.UTF_8);

jarrodhroberson / ObjectifyLoaderContextListener.java

Created April 12, 2015 10:34

Runtime Entity registration with very little overhead!

	package com.vertigrated.servlet;

	import com.google.appengine.api.ThreadManager;
	import com.googlecode.objectify.ObjectifyFactory;
	import com.googlecode.objectify.ObjectifyService;
	import com.googlecode.objectify.annotation.Entity;
	import org.reflections.Reflections;
	import org.reflections.util.ClasspathHelper;
	import org.reflections.util.ConfigurationBuilder;
	import org.slf4j.Logger;

jarrodhroberson / telemetry.ino

Last active August 29, 2015 14:13

arduino telemetry code for science fair 2015 project

	#include <I2Cdev.h>

	#include <LiquidCrystal.h>

	#include "MPU6050_6Axis_MotionApps20.h"

	#if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE
	#include "Wire.h"
	#endif

jarrodhroberson / ScannerExample.java

Last active August 29, 2015 14:07

Idiomatic Scanner Usage

	package com.stackoverflow.scanner;

	import javax.annotation.Nonnull;
	import java.math.BigInteger;
	import java.net.MalformedURLException;
	import java.net.URL;
	import java.util.*;
	import java.util.regex.Pattern;

	import static java.lang.String.format;

jarrodhroberson / DocumentedRuntimeExceptionExample.java

Last active August 29, 2015 14:07

How to document possible exceptions but not weigh now clients code with mandatory try/catch noise!

	public class DocumentedRuntimeExceptionExample
	{
	public static void main(final String[] args)
	{
	test();
	}

	public static void test() throws TestFailedRuntimeException
	{
	// do some stuff that may or may not throw an exception

jarrodhroberson / TypeToClass<T>.java

Created October 8, 2014 15:51

	import com.google.common.reflect.TypeToken;

	@SuppressWarnings("unchecked")
	public T get()
	{
	final Class<T> entityType = (Class<T>) new TypeToken<T>(getClass()) {}.getRawType();
	try { return entityType.newInstance(); }
	catch (InstantiationException \| IllegalAccessException e) { throw new RuntimeException(e); }
	}