ror, scala, jetty, erlang, thrift, mongrel, comet server, my-sql, memchached, varnish, kestrel(mq), starling, gizzard, cassandra, hadoop, vertica, munin, nagios, awstats
import java.io.IOException; | |
import java.io.PrintWriter; | |
import java.net.InetAddress; | |
import java.net.Socket; | |
import java.net.UnknownHostException; | |
import java.util.Scanner; | |
public class ChatClient implements Runnable { | |
// why is the ChatClient Multi-threaded? |
When hosting our web applications, we often have one public IP
address (i.e., an IP address visible to the outside world)
using which we want to host multiple web apps. For example, one
may wants to host three different web apps respectively for
example1.com
, example2.com
, and example1.com/images
on
the same machine using a single IP address.
How can we do that? Well, the good news is Internet browsers
$ python -c 'import random; print "".join([random.choice("abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*(-_=+)") for i in range(50)])' |
- Add
gem 'rails_12factor'
to your Gemfile. This will add error logging and the ability for your app to serve static assets. bundle
- Run
RAILS_ENV=production rake db:create db:migrate db:seed
- Run
rake secret
and copy the output - From the command line:
export SECRET_KEY_BASE=output-of-rake-secret
- To precompile your assets, run
rake assets:precompile
. This will create a folderpublic/assets
that contains all of your assets. - Run
RAILS_ENV=production rails s
and you should see your app.
Remember to clobber your assets (rake assets:clobber
) and re-precompile (rake assets:precompile
) if you make changes.
#!/bin/bash | |
# this script is not written by me. Just using it and sharing it here. | |
# export DBUS_SESSION_BUS_ADDRESS environment variable useful when the script is set as a cron job | |
PID=$(pgrep gnome-session) | |
export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-) | |
# $bing is needed to form the fully qualified URL for |
[Desktop Entry] | |
Categories=Development; | |
Comment=Supercharge your API workflow | |
Exec="/home/hauthorn/Programs/Postman/Postman" | |
Icon=/home/hauthorn/Programs/Postman/app/resources/app/assets/icon.png | |
Name=Postman | |
Terminal=false | |
Type=Application | |
Version=1.0 |
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:
function logColor(color, args) { | |
console.log(`%c ${args.join(' ')}`, `color: ${color}`); | |
} | |
const log = { | |
aliceblue: (...args) => { logColor('aliceblue', args)}, | |
antiquewhite: (...args) => { logColor('antiquewhite', args)}, | |
aqua: (...args) => { logColor('aqua', args)}, | |
aquamarine: (...args) => { logColor('aquamarine', args)}, | |
azure: (...args) => { logColor('azure', args)}, |
git rm -r --cached . | |
git add . | |
git commit -m "fixed untracked files" |