andersonfreitas

andersonfreitas

function derivative(f) {
   var h = 0.001;
   return function(x) { return (f(x + h) - f(x - h)) / (2 * h); };
}
 
console.log(" cos(2) = " + Math.cos(2));
console.log("-sin(2) = " + Math.sin(2));
console.log("(d cos/dx)(2) = " + derivative(Math.cos)(2));
 
function f(x) { return Math.pow(x, 3) + 2 * x + 1; };

andersonfreitas

sudo yum groupinstall "Development Tools"
sudo yum install mesa*
sudo yum install libXrandr*
sudo yum install libXext*
sudo yum install libX11*
sudo yum install libXi*
sudo rpm -ivH http://pkgs.repoforge.org/cmake/cmake-2.8.8-1.el6.rfx.i686.rpm

andersonfreitas

/* Put your CSS here */
html, body {
    margin: 20px;
}

andersonfreitas

brew update

mysqldump --all-databases -u root -p > full_backup.sql

mysql.server stop

brew remove mysql

rm -rf /usr/local/var/mysql

andersonfreitas

mp4sum() {
  TOTAL=0
  for x in $1/*.mp4
  do
    size=`mp4box -std -diso $x | grep 'TimeScale="1000"' | awk 'BEGIN{FS="\""};{ print $8 }'`
    TOTAL=`expr $TOTAL + $size / 1000`
  done
  x='obase=60;'$TOTAL
  print $x | bc
}

andersonfreitas

How to Ruby Debug with Pow

Below are steps I followed to get ruby debugger ruby-debug running with Pow. Based on info from this thread basecamp/pow#43 and this blog post http://flochip.com/2011/04/13/running-pow-with-rdebug/

1) Update your Gemfile

Assuming you're writing your app in Ruby 1.9 and using Bundler, just add the dependency to your development gems:

andersonfreitas

# Build Passes
curl -d "room_id=ourRoom&from=BuildBot&message=Build+Status:+Passing&color=green" https://api.hipchat.com/v1/rooms/message?auth_token=AUTH_TOKEN_HERE&format=json

# Build Fails
curl -d "room_id=ourRoom&from=BuildBot&message=Build+Status:+Failing&color=red&notify=1" https://api.hipchat.com/v1/rooms/message?auth_token=AUTH_TOKEN_HERE&format=json

andersonfreitas

source 'https://rubygems.org'

# The latest version of Ruby
ruby '2.0.0'

# The lastest version of Rails
gem 'rails', '3.2.11'

# Postgres
gem 'pg'

andersonfreitas

#!/usr/bin/tclsh8.5
#
# Usage: git-unmerged branch1 branch2
# 
# Shows all the non-common commits in the two branches, where non-common
# commits means simply commits with a unique commit *message*.

proc getlog branch {
    lrange [split [exec git log $branch --oneline] "\n"] 0 400
}