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METHOD MISSING

class InformationDesk
  def emergency
    # Call emergency...
    "emergency() called"
  end

  def flights
    # Provide flight information...

carlossanchezp

Opción 1)

class DateRange
  def initialize(from, to, step)
    @from, @to, @step = from, to, step
  end
 
  def each
    current = @from
    while current < @to do

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results = [ ]

for i in 1..3
  results << lambda { i }
end

puts results.map { |l| l.call }

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# Update System
# ------------------------------------------------------------------------------
echo 'Updating System...'
sudo apt-get -y update

# Hardware
# ------------------------------------------------------------------------------
echo 'Installing bumblebee'
sudo add-apt-repository -y ppa:bumblebee/stable && sudo apt-get update
sudo apt-get -y install bumblebee bumblebee-nvidia

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> db.things.insert( { _id : 1, tags : ['tag1', 'tag2'] } );
> db.things.insert( { _id : 2, tags : ['tag2'] } );
> db.things.insert( { _id : 3, tags : ['tag1', 'tag2', 'tag3'] } );
> db.things.insert( { _id : 4, tags : []  } );

> // función de mapeo
> m = function(){
...    this.tags.forEach(
...        function(z){
...            emit( z , { count : 1 } );

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/**
 * How to create a Javascript object and initialize its properties using dot notation (.)
 */
 
var code = new Object();
 
code.url = 'http://www.example.com';
code.twitter = '@example';
code.getTwitter = function() { return code.twitter; };
 

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# Ruby unexpected behavior when using .clone or .dup on a hash (or array)
 
# create a hash and freeze it so it shouldn't be modified
MY_HASH = { :one => { :first => 'eins', :second => 'zwei' } }.freeze
 
puts MY_HASH.inspect # {:one=>{:first=>"eins", :second=>"zwei"}}
 
new_hash = MY_HASH.dup # copy the hash, unfrozen
 
new_hash[:one][:second] = 'dos'

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[merge]
        tool = meld
[clolor]
        ui = true
[color]
        branch = auto
        status = auto
[color "branch"]
        current = yellow reverse
        local = yellow

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module ActiveRecord::UnionScope
  def self.included(base)
    base.send :extend, ClassMethods
  end
  
  module ClassMethods
    def union_scope(*scopes)
      id_column = "#{table_name}.id"
      sub_query = scopes.map { |s| s.select(id_column).to_sql }.join(" UNION ")
      where "#{id_column} IN (#{sub_query})"

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result_set.tap{|o| (o.blank?) ? o << "experts" : o << ".experts" if params[:type] == "Expert"}.
        tap{|o| (o.blank?) ? o << "customers" : o << ".customers" if params[:type] == "Customer"}.
        tap{|o| (o.blank?) ? o << "adminstrators" : o << ".adminstrators" if params[:type] == "Adminstrator"}.
        tap{|o| (o.blank?) ? o << "activated" : o << ".activated" if params[:activated] == 'true'}.
        tap{|o| (o.blank?) ? o << "deactivated" : o << ".deactivated" if params[:activated] == 'false'}
    end

   User.instance_eval { eval(result_set) }