Yaolong Huang airekans

airekans / random_shuffle.cpp

Created March 27, 2014 00:39

A random shuffling algorithm

	template<typename T>
	void random_shuffle(std::vector<T>& elems)
	{
	for (int i = 1; i < elems.size(); ++i)
	{
	int index = rand() % (i + 1);
	if (index != i)
	{
	swap(elems[i], elems[index]);
	}

airekans / heap_merge.cpp

Last active August 29, 2015 13:57

Use a heap to merge multiple files.

	typedef pair<int, int> Elem;

	bool compare(const Elem& lhs, const Elem& rhs)
	{
	return lhs.first < rhs.first;
	}

	int main()
	{
	vector<ifstream*> files;

airekans / timer.html

Created March 20, 2014 04:33

A sample JS timer in HTML

	<html>
	<head>
	<script>
	window.onload = function() {
	var test_elem = document.getElementById('test');
	var number = 1;
	test_elem.innerText = number;
	setInterval(function() {
	++number;
	test_elem.innerText = number;

airekans / echo_server.py

Created March 3, 2014 14:41

A simple echo server using gevent.

airekans / parse.py

Created January 22, 2014 08:05

A simple parser based on the lexer mentioned in https://github.com/alanszlosek/mercussion/blob/master/lexer.py

	#! /usr/bin/env python
	#
	# The grammar for the parsed language is very simple.
	# It's like a JSON variation.
	# Here's a simple valid expression:
	# {
	# a 1,
	# b 2,
	# c {
	# c_1 3,

airekans / net.py

Created January 2, 2014 09:04

parse /proc/net/dev file to get network statistics.

	import pprint

	if __name__ == '__main__':
	proc_net_file = open('/proc/net/dev')

	field_values = {}

	for l in proc_net_file:
	if ':' in l:
	head_content = l.split(':')

airekans / get_ip.cpp

Last active January 1, 2016 19:59

Some useful /proc information I can use to check the state of the system.

	// This program simply gets the ip for the specified interface.

	#include <iostream>
	#include <sys/ioctl.h>
	#include <net/if.h>
	#include <sys/socket.h>
	#include <netinet/in.h>
	#include <arpa/inet.h>

	using namespace std;

airekans / go.sh

Created December 30, 2013 03:50

A script used to login remote machine without human interaction by using expect.

airekans / libevent_echo_server.cpp

Last active January 1, 2016 10:29

All kinds of echo server implementations.

	/*
	This exmple program provides a trivial echo server program that listens for TCP.
	Where possible, it exits cleanly in response to a SIGINT (ctrl-c).
	*/


	#include <string.h>
	#include <errno.h>
	#include <stdio.h>
	#include <signal.h>

airekans / diff.py

Created December 5, 2013 08:49

Get the diff of the two sorted sequence stored in files.