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# Safe session extension for merb applications.  Generates a
# unique session salt for an application install automatically
# instead of requiring the user to do so themselves.
class SafeSession
  
  require "digest/sha1"
  attr_reader :salt
  
  # Attempts to load the session salt from the saltfile, if it does
  # not exist a new salt is generated 

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Merb::Config.use do |c|
  c[:use_mutex] = false
  # Setup the session store, require the safe_session extension to
  # generate a unique salt for the application if one does not
  # already exist
  c[:session_store] = 'cookie'
  require File.join(Merb.root, "merb/extensions/safe_session.rb")
  safe_session = SafeSession.new
  c[:session_secret_key]  = safe_session.salt
  c[:session_id_key] = '_irsea_session_id'

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# Module containing a collect_kv method to allow
# a new hash to be generated my collect instead
# of returning an array of modified keys or values
module CollectKeyValue

  # Takes a block that returns a [key, value] pair
  # and builds a new hash based on those pairs
  def collect_kv
    result = {}
    each do |k,v|

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# Create a new hash and extend it with our CollectKeyValue
# module
hash ={
  "key_1"=>"one",
  "key_2"=>"two",
  "key_3"=>"three",
  "key_4"=>"four"
}.extend(CollectKeyValue)

# Now lets call our new hash#collect_kv method and rename

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require 'rubygems'
require 'hpricot'

doc = Hpricot( File.open("file.html") )
(doc / "span.foo").each do |span|
  span.swap("***#{span.inner_html}***")
end

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def add(num1)
  lambda { |num2| num1 + num2 }
end

add(2).call(2) # returns 4

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# Mixin to scan an array for objects that respond to a given method
module WithMethod

  # Iterates through the array and returns a list of items that
  # respond to method
  def with_method(method)
    select { |item| item.respond_to? method }
  end

end

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  #
  # Return UTM Zone for a geom
  #
  # Return Integer
  def utm_zone
    geomgeog = srid == 4326 ? self[get_column_name] : transform(4326)
    puts geomgeog.class
    geom = case geomgeog
           when Point then  geomgeog
           when LineString then geomgeog.first

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# Adds the two arguments passed in to the method
def add(num1, num2)
  num1 + num2
end

# We have an array that we want to pass in to add,
# with each item as a seperate argument
my_args = [1, 2]

# Prefixing a variable name with a * will attempt

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# adds two named arguments passed in, named :first and
# :second respectively
def add(args)
  args[:first] + args[:second]
end

# Call it using 1.8 and below style
puts add(:first => 2, :second => 4) # 6

# Call it using the 1.9 style hash syntax