mxgrn

#!/bin/sh
#
# This will abort "git commit" and remove the trailing whitespaces from the files to be committed.
# Simply repeating the last "git commit" command will do the commit then.
#
# Put this into .git/hooks/pre-commit, and chmod +x it.
if git rev-parse --verify HEAD >/dev/null 2>&1
then
  against=HEAD
else

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

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

dennysfredericci

$('form').validate(
					 {
					  rules: {
					    numero: {
					      required: true
					    },
					    descricao: {
					      minlength: 3,
					      email: true,
					      required: true

mbostock

license: gpl-3.0

rantav

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

sheharyarn

#!/bin/bash
 
MONGO_DATABASE="your_db_name"
APP_NAME="your_app_name"

MONGO_HOST="127.0.0.1"
MONGO_PORT="27017"
TIMESTAMP=`date +%F-%H%M`
MONGODUMP_PATH="/usr/bin/mongodump"
BACKUPS_DIR="/home/username/backups/$APP_NAME"

bcomnes

# Fix agent forwarding
# https://gist.github.com/martijnvermaat/8070533
# http://techblog.appnexus.com/2011/managing-ssh-sockets-in-gnu-screen/
# See .ssh/rc for socket linking
unsetenv SSH_AUTH_SOCK
setenv SSH_AUTH_SOCK $HOME/.ssh/ssh_auth_sock.$HOSTNAME