e000

##########################################################
# How to NEVER use Lambdas. An inneficient and yet educa-#
# tonal guide to the proper misuse of the lambda constru-#
# ct in Python 2.x.     [DO NOT USE ANY OF THIS EVER]    #
#                                   by: e000 (13/6/11)   #                 
##########################################################

## Part 1. Basic LAMBDA Introduction ##
# Well, it's worth diving straight into what lambdas are.
# Lambdas are pretty much anonymous "one line" functions

phpdude

        location /resize {
                alias /tmp/nginx/resize;
                set $width 150;
                set $height 100;
                set $dimens "";

                if ($uri ~* "^/resize_(\d+)x(\d+)/(.*)" ) {
                        set $width  $1;
                        set $height $2;
                        set $image_path $3;

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

oubiwann

from twisted.internet import defer, reactor
from twisted.web.client import getPage

def listCallback(results):
  print results

def finish(ign):
  reactor.stop()

def test():

jdunck

#cribbed from http://vimeo.com/52569901 (Twilio carrier call origination moderation)
# The idea is that many fan-in queues can enqueue at any rate, but
#  dequeue needs to happen in a rate-controlled manner without allowing
#  any individual input queue to starve other queues.
#  http://en.wikipedia.org/wiki/Leaky_bucket (second sense, "This version is referred to here as the leaky bucket as a queue.")
#
#  requires:
#  redis 2.6+
#  redis-py>=2.7.0
#  anyjson

thenoseman

" Executes the current ruby line when there is a # =>
" marker at the end replacing it with the evaled
" result
function! RubyExecuteLineWithMarker()
    ruby << EOF
        marker = '# =>'
        buffer = VIM::Buffer.current
        if buffer.line.match(/#{marker}/)
          result = marker + ' ' + eval(buffer.line, binding).inspect
          buffer.line = buffer.line.sub(/#{marker}.*/, result).chomp

gabrielfalcao

0 = Success
1 = Operation not permitted
2 = No such file or directory
3 = No such process
4 = Interrupted system call
5 = Input/output error
6 = No such device or address
7 = Argument list too long
8 = Exec format error

reyjrar

##################################################################
# /etc/elasticsearch/elasticsearch.yml
#
# Base configuration for a write heavy cluster
#

# Cluster / Node Basics
cluster.name: logng

# Node can have abritrary attributes we can use for routing