peteroid’s gists

peteroid / # opencv3 - 2016-04-24_11-38-59.txt

Created April 24, 2016 18:56

opencv3 (homebrew/science/opencv3) on Mac OS X 10.11.4 - Homebrew build logs

	Homebrew build logs for homebrew/science/opencv3 on Mac OS X 10.11.4
	Build date: 2016-04-24 11:38:59

peteroid / Spark-random-nums.scala

Created July 2, 2016 03:51

Generate random numbers and save to hdfs

	import scala.util.Random;
	var NUM_SAMPLES = 2000000000;
	val count = sc.parallelize(1 to NUM_SAMPLES).map{ _ => Random.nextLong };
	var sum = count;for (_ <- 1 to 20){sum = sum ++ count};
	sum.saveAsTextFile("hdfs://10.0.72.14:54310/data/big_num_700g.txt");

peteroid / singleton.js

Last active July 26, 2016 21:32

Node JS Simple Singleton used by require()

	var singleton = function () {
	// all are public
	var someVariable = "some value" // acts like states
	var otherVariable = 123 // acts like states

	return {
	someFunction: function (someArg) {
	// expressions go here, change state
	return "other value"
	},

peteroid / vertical-align.css

Created August 3, 2016 17:20

An example implementing the vertical alignment

	/* absolution position + transform approach */
	.parent {
	height: 100vh;
	position: relative;

	.children {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);

peteroid / SparkBench.scala

Created August 3, 2016 23:42

A simple scala object for benchmarking Spark app

	import java.text.SimpleDateFormat
	import java.util.Date
	import scala.collection._
	import sys.process._
	import java.io._

	import org.apache.spark.SparkContext
	import org.apache.spark.SparkContext._
	import org.apache.spark.SparkConf
	import org.apache.spark.scheduler._

peteroid / tenpin-bowling-score.js

Last active October 19, 2016 06:40

	var getTenPinBowlingScore = function (result) {

	// construct the array from string
	var resultArr = result.split(',').map(s => {
	return parseInt(s)
	})

	var calculatedResult = resultArr.reduce((preVal, curVal, curIdx, arr) => {

	// calcualte any extra score

peteroid / unity-arduino-mpu6050.cs

Last active December 16, 2017 12:30

Get the quaternion from arduino output string with filter

	// !!! Attention !!!
	void initPort (SerialPort port) {
	// set this encoding to extend the ascii range
	port.Encoding = System.Text.Encoding.GetEncoding(28591);
	}

	// Take a string and parse the quaternion and corresponding index
	// return:
	// quat = Quaternion.identity if packet is invalid
	// index = -1 if packet is invalid

peteroid / unity-arduino-mpu6050.c

Last active October 27, 2016 04:20

Arduino side of this

	...
	// modify the initiator of the packet
	uint8_t teapotPacket[20] = { '$', 0x02,
	0,0, 0,0, 0,0, 0,0,
	0,0, 0,0, 0,0,
	0x00, 0x00, '\r', '\n' };
	...

	loop() {
	...

peteroid / multiple-mpus_with-node.ino

Last active November 2, 2016 06:55

	// I2C device class (I2Cdev) demonstration Arduino sketch for MPU6050 class
	// 10/7/2011 by Jeff Rowberg <[email protected]>
	// Updates should (hopefully) always be available at https://github.com/jrowberg/i2cdevlib
	//
	// Changelog:
	// 2013-05-08 - added multiple output formats
	// - added seamless Fastwire support
	// 2011-10-07 - initial release

	/* ============================================

peteroid / multi-mpus_with-74HC4052.ino

Last active November 3, 2016 18:47

	// I2C device class (I2Cdev) demonstration Arduino sketch for MPU6050 class
	// 10/7/2011 by Jeff Rowberg <[email protected]>
	// Updates should (hopefully) always be available at https://github.com/jrowberg/i2cdevlib
	//
	// Changelog:
	// 2013-05-08 - added multiple output formats
	// - added seamless Fastwire support
	// 2011-10-07 - initial release

	/* ============================================

Peter Chow peteroid