cowboy-cod3r

Integer comparison

-eq
-ne
-gt
-ge
-lt
-le

cowboy-cod3r

# Extend the String class with a new method called my_new_method
class String
  def my_new_method()
  end
end

cowboy-cod3r

1. Add disk space to the vm by adding another virtual disk.

2. In the linux VM, issue the following commands:
   # List existing disks
   fdisk -l
   
   # Scan for the new disk created in step 1.
   echo "- - -" >/sys/class/scsi_host/host0/scan
   
   # List existing disks (should see the new disk)

cowboy-cod3r

# This will get executed upon exit of a ruby process
at_exit { puts "Hello Sean" }

cowboy-cod3r

# == Description
# the <=> operator returns 1, 0, or -1, depending on the value of the left arugment relative to the right
# This operator is good to use when you want to define how to compare two like object
# The operator must return -1 for less than, 1 for greater than, and 0 for equal to
class Expense
  
  # Modules
  include Comparable
  
  # Accessors

cowboy-cod3r

#!/opt/apps/ruby/ruby/bin/ruby
require 'date'

# The initial date format as a String
my_date = "2013-10-03 21:03:46Z"

# Convert the Date to a DateTime Object
date_obj = DateTime.strptime(my_date,'%Y-%m-%d %H:%M:%S%Z')

# Re-Format the date - returns a String

cowboy-cod3r

#!/opt/apps/ruby/ruby/bin/ruby
require 'date'

# Hold the time differences to calculate averages
time_diffs = []

# Get three time differences
1..3.times do
  initial_time = DateTime.now()
  sleep 1

cowboy-cod3r

# Ask use for input

# -e - if standard input is coming from a terminal, readline is used to obtain the line 
# -p - display prompt on stderr without a trailing new line 

default="/usr/locol/etc/"
read -e -p "Enter the path to the file [${default}]: " FILEPATH 
FILEPATH=${FILEPATH:-${default}}
echo $FILEPATH

cowboy-cod3r

if [[ $EUID -ne 0 ]]; then 
   echo "ERROR: The user must be root in order to execute this script." 
   exit 1 
fi

cowboy-cod3r

# Get the current file
current_file = $0

# Get the full path to the current file
full_file_path="$(readlink -f $(dirname $0))/$(basename $0)"

# Get the full directory path to the current file
full_dir_path="$(readlink -f $(dirname $0))"