Bill Havanki bhavanki

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Marylander, Segmenter / Twilion, Go / Java nerd, likes big transforming robots.

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bhavanki / gitprompt.sh

Last active December 21, 2015 23:29

.bashrc snippet to include the current Git branch in the prompt

	parse_git_branch() {
	git branch --no-color 2>/dev/null \| sed -e '/^[^]/d' -e 's/ $.*$/ \1 /'
	}

	gitps1() {
	local GREEN="\[\033[0;32m\]"
	local DEFAULT="\[\033[0m\]"
	PS1="[\u@\h \W]$GREEN\$(parse_git_branch)$DEFAULT\$ "
	}
	gitps1

bhavanki / Sieve.java

Created August 26, 2013 20:42

Java implementation of Sieve of Eratosthenes

	import java.util.List;

	public class Sieve {
	static List<Integer> sieve(int n) {
	List<Integer> l = new java.util.ArrayList<Integer>();
	byte[] bs = new byte[(n / 8) + 1]; // 0 => maybe prime
	bs[0] = (byte) 0xc0; // skip 0 and 1
	for (int i = 2; i <= n / 2; i++) {
	for (int c = i; c <= n; c += i) {
	int bidx = c / 8;

bhavanki / groovynotes.md

Created August 13, 2013 15:40

Notes on transitioning from Java to Groovy

Notes on Groovy

Optional (Duck) Typing

class Duck {
  def walk() { println "I'm a duck, I walk" }
  def swim() { println "I'm a duck, I swim" }
  def quack() { println "QUACK" }
}

class Person {

bhavanki / httpd.py

Created August 12, 2013 20:55

Simple HTTP server in Python; serves the current directory.

	import os
	import sys
	import BaseHTTPServer
	from SimpleHTTPServer import SimpleHTTPRequestHandler

	pid = os.fork()
	if pid != 0:
	print "Server PID is", pid
	sys.exit()

bhavanki / gojdk.sh

Created August 9, 2013 19:16

Script to swap environment to a different JDK. Must be sourced to work.

	#!/bin/bash

	echo Switching to Java $1

	OLD_JAVA_HOME=$JAVA_HOME

	if [ "$1" == "1.6" -o "$1" == "6" -o "$1" == "6.0" ]; then
	export JAVA_HOME=/usr/lib/jvm/java-1.6.0
	elif [ "$1" == "1.7" -o "$1" == "7" -o "$1" == "7.0" ]; then
	export JAVA_HOME=/usr/lib/jvm/java-1.7.0

bhavanki / cdpom.sh

Created August 9, 2013 19:12

Simple script to bounce you back up to the first parent directory with a Maven POM in it. Must be sourced to work as expected (so alias it).

	#!/bin/bash

	POMDIR=$(pwd)
	while [[ "$POMDIR" != "/" && ! -f "$POMDIR/pom.xml" ]]; do
	POMDIR=$(dirname "$POMDIR")
	done

	if [[ "$POMDIR" != "/" ]]; then
	cd "$POMDIR"
	else

bhavanki / charesc.html

Created January 23, 2013 19:06

Page to emit character literal escape sequences in different programming languages.

	<html>
	<head><title>Character Escapes</title>
	<style type="text/css">
	body {
	font-family: sans-serif;
	margin-top: 1in;
	}
	p {
	font-size: large;
	text-align: center;

bhavanki / glitchdate.py

Created November 4, 2012 03:24

Python script to report the current time in Ur, the world of Glitch.

	#!/usr/bin/python
	import calendar
	from datetime import datetime
	from optparse import OptionParser
	import sys

	# Define command line options: -D, -f, -F.
	op = OptionParser()
	op.add_option('-D', '--date', dest='date_to_use',
	help='UTC date to use instead of now, as %Y%m%d%H%M')

bhavanki / prompt_open_file_path.py

Created August 15, 2012 21:08

Sublime Text 2 plugin for emacs-like file open. Based on https://bitbucket.org/chrisguilbeau/cg-sublime.

	import sublime, sublime_plugin
	from os import listdir
	from os.path import commonprefix
	from os.path import isdir
	#from os import getenv
	from os import getcwd
	from os import sep

	class PromptOpenFilePathCommand(sublime_plugin.WindowCommand):

bhavanki / colorize-maven.sh

Created June 21, 2012 21:10 — forked from mike-ensor/colorize-maven.sh

Colorize Maven output

	#!/bin/sh

	# Written by Mike Ensor (mike@ensor.cc)
	# Copywrite 2012
	# Use as needed, modify, have fun!
	# Modified by Bill Havanki
	# This was intended to be used for Maven3 + Mac OSX, but it's been modified for Cygwin and Linux.
	# Maybe it still works on OSX?
	# Changes from original:
	# - Cygwin support

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