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View stackify.ipynb
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qingniufly /
Created Mar 28, 2017
Java NIO, ByteBuffer <--> String
// ByteBuffer to String
String s = Charset.forName("UTF-8").decode(byteBuffer).toString();
// String to ByteBuffer
ByteBuffer buff = Charset.forName("UTF-9").encode("Hello, World!");
// String to ByteBuffer
public static ByteBuffer str_to_bb(String msg, Charset charset){
return ByteBuffer.wrap(msg.getBytes(charset));
simonw /
Last active Dec 9, 2019
How to recover lost Python source code if it's still resident in-memory

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using and

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb
bearfrieze /
Last active Dec 2, 2019
Comprehensions in Python the Jedi way

Comprehensions in Python the Jedi way

by Bjørn Friese

Beautiful is better than ugly. Explicit is better than implicit.

-- The Zen of Python

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

View gist:26fb3b7e365dce527886
Results of running this script:
Views Ups Downs Title (Speakers)
9,810 166 3 Keynote - Jacob Kaplan-Moss - Pycon 2015 (Jacob Kaplan-Moss)
7,044 64 0 Type Hints - Guido van Rossum - PyCon 2015 (Guido van Rossum)
4,742 121 0 David Beazley - Python Concurrency From the Ground Up: LIVE! - PyCon 2015 (David Beazley)
4,684 66 3 Keynote - Guido van Rossum - PyCon 2015 (Guido van Rossum)
4,272 78 1 Dan Callahan - My Python's a little Rust-y - PyCon 2015 (Dan Callahan)
2,694 34 0 How to build a brain with Python (Trevor Bekolay)
2,391 29 0 Andrew T. Baker - Demystifying Docker - PyCon 2015 (Andrew T. Baker)
#!/usr/bin/env python3
# encoding: utf-8
I saw a similar script on the homepage of Miguel Grinberg (the Flask book guy),
but he was using webscraping. Here I use simple API calls instead.
The script takes the presentations of a Python conference and orders the
presentations in descending order by the number of youtube views. It
is an indicator about the popularity of a video.
wjp2013 / wechat-useragent.js
Created Mar 6, 2015
View wechat-useragent.js
// 检测浏览器的 User Agent 应该是非常简单的事情
// 微信在 Android 下的 User Agent
mozilla/5.0 (linux; u; android 4.1.2; zh-cn; mi-one plus build/jzo54k) applewebkit/534.30 (khtml, like gecko) version/4.0 mobile safari/534.30 micromessenger/
// 微信在 iPhone 下的 User Agent
mozilla/5.0 (iphone; cpu iphone os 5_1_1 like mac os x) applewebkit/534.46 (khtml, like gecko) mobile/9b206 micromessenger/5.0
// 通过javascript判断
// 很容易看出来,微信的 User Agent 都有‘micromessenger’字符串标示,我们判断是否含有这些字符串就OK了
function isWeixinBrowser(){
denji /
Last active Dec 15, 2019 — forked from spikebike/client.go
Simple Golang HTTPS/TLS Examples

Moved to git repository:

Generate private key (.key)
# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)
leftclickben / gist:322b7a3042cbe97ed2af
Last active Sep 26, 2019
Steps to migrate from SVN to GitLab
View gist:322b7a3042cbe97ed2af

Steps to migrate from SVN to GitLab

This process worked for me. I take no responsibility for any damage or loss incurred as a result of following or not following these steps or, for that matter, anything else you might do or not do.


  • SVN is hosted at
  • SVN is accessible via http (other protocols should work).
  • GitLab is hosted at and:
rothgar / install-tmux
Last active Dec 10, 2019 — forked from ekiara/how_to_install_tmux_on_centos
Install tmux 1.9 on rhel/centos 6
View install-tmux
# Install tmux on Centos release 6.5
# install deps
yum install gcc kernel-devel make ncurses-devel
curl -OL
tar -xvzf libevent-2.0.21-stable.tar.gz
cd libevent-2.0.21-stable
./configure --prefix=/usr/local
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