davideuler

在中国的创业团队中如何培养工程师文化： http://www.zhihu.com/question/20735690

豆瓣： http://www.douban.com/note/65095757/

豌豆荚： http://blog.wangjunyu.net/1140

http://blog.wangjunyu.net/1138

davideuler

设计原本
黑客与画家
代码质量
技术领导之路

布道之道
rework
创业者手册

深入理解计算机网络

davideuler

#!/usr/bin/python 
# -*- encoding: UTF-8 -*-

import codecs
import sys
from math import log
from collections import defaultdict

class Trie (object):
    class TrieNode:

davideuler

IPsec/L2TP VPN Auto Install Script for Ubuntu/Debian

Amazon EC2 user-data file for automatic configuration of IPsec/L2TP VPN server on a Ubuntu or Debian instance. Tested with Ubuntu 14.04 & 12.04 and Debian 8 (Jessie).

With minor modifications, this script can also be used on dedicated servers or any KVM- or XEN- based Virtual Private Server (VPS) from other providers.

My VPN tutorial with detailed usage instructions

Alternative VPN script for CentOS/RHEL
Original post by Thomas Sarlandie

davideuler

/*jshint  esnext:true*/
// see https://gitlab.com/help/web_hooks/web_hooks for full json posted by GitLab
const NOTIF_COLOR = '#6498CC';
const refParser = (ref) => ref.replace(/^.*?([^\/]+)$/,'$1');

class Script {
	process_incoming_request({request}) {
		try {
			switch(request.headers['x-gitlab-event']){
				case 'Push Hook':

davideuler

ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

davideuler

#!/usr/bin/env python3
# -*- encoding: utf-8 -*-

import time

from pymongo import MongoClient
from prometheus_client import start_http_server
from prometheus_client.core import GaugeMetricFamily, CounterMetricFamily, REGISTRY

from config.settings import MONGO_USER, MONGO_PASS, MONGO_URL, MONGO_DBNAME

davideuler

import gnsq
conn = gnsq.Nsqd(address='localhost', http_port=4151)

conn.publish('topic_name', 'hello gevent!')
conn.publish('topic_name', 'hello nsq!')

davideuler

from multiprocessing import Process
import time
import redis

# publish random message 
def pub(myredis):
    for n in range(10):
        myredis.publish('channel_rand','blah %d' % n)
        time.sleep(1)

davideuler

Convert XPS to PDF on Linux and Mac

1. Download this file

2. chmod +x ./xps2pdf.bash

3. To convert a particular xps file: ./xps2pdf.bash thefile.xps

4. To convert all xps files in the current working directory: ./xps2pdf.bash *.xps