EyalAr’s gists

EyalAr / gist:3018471

Created June 29, 2012 15:03

An explanation + examples about Java generics and bounded wildcards.

	/**
	* Java Generics, Wildcards and Bounded Wildcards.
	*
	* ...Can be confusing. Here's a small explanation + examples.
	*/

	import java.util.LinkedList;
	import java.util.List;

	/**

EyalAr / registerS3ProtocolStreamWrapper.php

Last active January 29, 2019 19:31

Registering and using S3 protocol with AWS S3 stream wrapper for PHP

	<?php

	define('AWS_KEY','YOUR_AWS_KEY_HERE');
	define('AWS_SECRET','YOUR_AWS_SECRET_HERE');

	require_once('AWSSDKforPHP/sdk.class.php');
	require_once('AWSSDKforPHP/extensions/s3streamwrapper.class.php');

	$s3 = new AmazonS3(array(
	'key' => AWS_KEY,

EyalAr / hello_world_opencv.cpp

Created October 23, 2012 18:37

Hello World in OpenCV

	#include "opencv2/opencv.hpp"
	#include "opencv2/highgui/highgui.hpp"

	using namespace cv;

	int main(int argc, char** argv) {

	//create a gui window:
	namedWindow("Output",1);

EyalAr / ExtractEigenfaces.m

Last active August 17, 2017 21:33

Matlab script which extracts to files the eigenfaces of a set of face images.

	% Extract the eigen-faces of a set of face images.

	start_index = 1;
	end_index = 10;
	base_name = '';
	extension = '.jpg';
	in_dir = 'in';
	out_dir = 'ef';

	images = [];

EyalAr / InitPersonRecognizer.cpp

Last active December 1, 2016 03:34

Code snippets for my OpenCV face recognition tutorial, in which I show how to build an application which recognizes a specific person in a video. Full code at: https://bitbucket.org/EyalAr/person-recognizer

	#define PERSON_LABEL = 10 //some arbitrary label

	//LBPH face recognizer parameters:
	#define RADIUS 1
	#define NEIGHBORS 8
	#define GRID_X 8
	#define GRID_Y 8
	#define THRESHOLD 130.0

	//create a LBPH face recognizer model:

EyalAr / CsvWriter.hpp

Last active December 15, 2015 21:38

Code samples for my face detection and recognition with OpenCV tutorial. http://blog.eyalarubas.com/2013/03/14/face-detection-and-recognition-theory-and-practice/

	class CsvWriter {
	public:
	CsvWriter(const string &csvPath);
	virtual ~CsvWriter();
	void nextLine();
	void addEntry(const string &s);
	private:
	ofstream _fs;
	bool _isFirstEntry;
	};

EyalAr / client.py

Created December 11, 2013 18:17

Demo code for my post about python's blocking stream reading functions.

	from subprocess import Popen, PIPE
	from time import sleep

	# run the shell as a subprocess:
	p = Popen(['python', 'shell.py'],
	stdin = PIPE, stdout = PIPE, stderr = PIPE, shell = False)
	# issue command:
	p.stdin.write('command\n')
	# let the shell output the result:
	sleep(0.1)

EyalAr / count_words_in_selection.py

Last active July 1, 2021 07:35

Count words in selection - plugin for Sublime Text 3. Full blog post: http://eyalarubas.com/count-words-in-sublime-text-3.html

	import sublime, sublime_plugin, re

	class CountWordsInSelectionCommand(sublime_plugin.EventListener):

	def on_selection_modified(self, view):
	'''
	listen to event 'on_selection_modified' and count words in all selected
	regions when invoked.
	'''

EyalAr / 1.generator_example.js

Created May 9, 2014 07:19

Code snippets for Javascript generators and asynchronous code presentation. Based on http://eyalarubas.com/javascript-generators-and-callbacks.html

	// generate a series of even numbers,
	// but be able to to reverse the order of iteration

	function * generateEvens(start) {
	var dir = 1; // up
	if (start % 2 !== 0) start++;
	while (true) {
	var tmp = yield start;
	if (tmp === 'up') dir = 1;
	if (tmp === 'down') dir = -1;

EyalAr / batch_export.sh

Last active October 3, 2023 01:55

Shell script to easily export mongo collections into JSON files

	#!/usr/bin/env bash

	#https://gist.github.com/EyalAr/67791f51fce51ed55594

	COLLECTIONS=()
	HOST="127.0.0.1"
	PORT="27017"
	DB=

	if [ -n "$1" -a "$1" = "--help" ]

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