Oi Amigo

Hip Hip Hurray !!! I got Google Digital Unlocked Certificate

noreply@blogger.com (Shaikshavali) — Mon, 03 Jul 2017 13:43:00 +0000

Hi Amigos,

Today i would like to share something which i achieved today. There is one Post i saw few days back in Facebook. What that post contains is "Digital unlocked", running by Google people to give awareness of Digital marketing. Seems to be something interesting right.

I also felt something new to learn in this program, I went through all topics. Once you finish the topics you will get certified. Sounds good right?

They will explain each and every topic with video and after completion of video they will ask topic related question, Once that is done you go for next session in that topic. After finishing all sessions in that topic there will be one assignment on that topic. if you completed the assignment you will go to next level and also you will earn one Badge.

Through this "Digital Unlocked" programe I learnt new ways of digital marketing and few technical terms which are used in SEO, SEM. They are covering all most all topics in digital marketing.

Your first steps in online success

Your online goals
Building your online presence
Marketing your online presence
Analyse and adapt

Build your web presence

Choosing your online presence
How websites work
Key website ingredients
Websites and your business goals
Make your website easy to use
Website design do’s and don’ts

Get discovered with search

Intro to search engine optimisation (SEO)
The importance of an SEO plan
The SEO process
How to choose keywords
Setting realistic SEO goals

Be noticed with search ads

Introduction to search engine marketing (SEM)
The SEM auction
What makes a good keyword
Make your ads stand out

Get started with analytics

What is web analytics?
Making web analytics work for you
Tracking specific goals with web analytics

Get noticed with social media

Social media basics
The right social media sites for you
Setting your goals for social media
Getting on social media

Discover the possibilities of mobile

The evolution of mobile devices
Understanding mobile web and mobile apps
Understanding mobile apps

Build your online shop

Using e-commerce to sell
Taking payments and managing orders

The online opportunity

The world goes digital
Your digital opportunity

Connect through email

Email marketing basics
Your email marketing options
Crafting great marketing emails
Managing successful email campaigns

Get started with search

Search engine basics
How search engines work
How search engines see the web
Organic search explained
Paid search explained
Google search console

Make search work for you

Making your web pages search friendly
How other websites can work for you
Cross borders with SEO

Improve your search campaigns

Achieve relevance with good structure
Get the most from your keywords
Fine-tune with keyword match types
How to know what’s working and what isn’t

Find success with analytics

Web analytics and organic search
Tools to measure SEM
Breaking down your data for insights

Get noticed locally

Marketing to the locals
The power of local directories

Help people nearby find you online

Using digital to advertise locally
Reaching locals on their mobiles
SEO for local businesses

Deep dive into social media

Your long-term social media plan
Advertising on social media
Measuring success in social media
Avoiding social media pitfalls

Make mobile work for you

Introduction to advertising on mobile
Search campaigns for mobile
Display campaigns for mobile
Social media campaigns for mobile
Video for mobile

Advertise on other websites

What is display advertising?
Search advertising vs. display advertising
The ins and outs of display advertising

Deep dive into display advertising

Making display ads meet your goals
Understanding ad networks
How re-targeting works

Expand internationally

Introduction to international marketing and export
Validating your new market
Being understood abroad
Advertise across borders
The support systems you will need
Helping customers abroad buy your products
Delivering to customers across the globe

Make the most of video

The rise of online video
How video fits into your online strategy
Creating video content within your budget
Sharing and promoting your videos
Advertising on video sharing sites
Measuring video performance

Sell more online

Creating a smooth e-commerce experience
Product promotion and merchandising
Re-targeting for e-commerce

All topics are very interesting. They are giving live examples and explaining well. Hope you will learn new things today.

Please share and follow me to get new updates.

Thanks

***********

Shaik (Developer)

Academic Projects using Ruby On Rails

noreply@blogger.com (Shaikshavali) — Thu, 29 Jun 2017 19:00:00 +0000

Hi Guys,

Today i want to share something new with the readers. I got an idea in my mind, i am already sharing my knowledge through this blog but guys are feeling bore. So i decided that i can do something real time work sharing with readers. If you are interested to get personal online training and one real time project, just you can leave comment in this post and add your details like Name, email.

I will read each and every comment and give you schedule classes for that person. If you want meet me you can catch me in:
Skype: tajshavali

In this post i will explain one of my training project. This project involve several concepts registering users with roles like admin, user, Email confirmation with registration and using third party tool to send SMS.

Project Title:

Online Mobile Sales & Services

Description:

Providing the details of the mobile and their prices. You can find the mobile dealers near by you location. Filter the mobiles by your location and Who and all the dealers for selected mobiles.

If you need any service or new mobile purchase from the dealers just you can your contact details to the dealer, later dealer will contact you. This is can make sense right.

Software Requirements:

Technologies	Ruby, Ruby on Rails(Framework for web application and backend)
Database	MySQL
SMS sending tool	twilio
Web technology	Bootstrap, HTML, CSS, jQuery, Javascript.

Screenshots:

Dashboard

Mobile View

About

Admin Page

Hope you guys like my concept, Thanks i will come up new concept/project.

Independent Contractor

noreply@blogger.com (Shaikshavali) — Thu, 20 Apr 2017 13:13:00 +0000

I am experienced software engineer with a technology called Ruby on Rails. I have done several projects/Web Applications using ROR. Initially when i was started learning ruby, i felt difficulty. Once we started learning Ruby problem solving then we will get more interest to do something new.

My first project is like Educational and social networking. In this project i got more knowledge in real time how we should implement the client requirement. Now i got 5 years of experience in Ruby on Rails. In this period of time i did several projects using ROR. Few of them are only API writing. Most of them are Web applications.

Now i am planing to work as independent. So i am searching freelancing jobs, i gone through several freelancing websites. So i would like to get freelancing jobs through this.

Hope i will get it. Thanks.

Ruby Load Path and Auto Loading in Rails - Other small concepts

noreply@blogger.com (Unknown) — Wed, 22 Jun 2016 13:49:00 +0000

Hi Readers,

This is the last post for Ruby beginners. Today we are going to learn some small concepts and Ruby load paths and auto loading in Rails

define_method:

class Array
{:second => 1, :third => 2}.each do |method,element|
    define_method(method) do
      self[element]
    end
end
end

array = %w(A B C)
puts array.first # => A
puts array.second # => B
puts array.third # => C

Object Space:

ObjectSpace.each_object(Numeric) { |n| puts n }

Class Reflection:

    # Using Class#superclass
    klass = Fixnum
    begin
      print klass
      klass = klass.superclass
      print " < " if klass
    end while klass
    # => Fixnum < Integer < Numeric < Object

    # Using Class#ancestors
    Fixnum.ancestors
    # => Fixnum, Integer, Precision, Numeric, Comparable, Object, Kernel

    # Inspecting methods and variables
    Fixnum.public_instance_methods(false)
    Fixnum.class_variables
    Fixnum.constants
    1.instance_variables

System Hooks: Class#inherited

    class A
      @@subclasses = {}
      # Invoked when a new class is created that extends this class
      def self.inherited(child)
        puts "inherited"
        @@subclasses[self] ||= []
        @@subclasses[self] << child
      end

      def self.subclasses
        @@subclasses[self]
      end
    end

    class B < A
    end

    puts A.subclasses

Ruby Load Path and Auto Loading in Rails:

The Ruby load path is stored in $: and is used when you require code
Models, views, controllers, and helpers under the app dir are loaded automatically
Classes under lib are also loaded automatically
You can add load paths in config/environment.rb
Class and module names must correspond to the file path where they are defined for auto loading to work

const_missing – for Auto Loading Classes, eval and binding

noreply@blogger.com (Unknown) — Tue, 14 Jun 2016 12:08:00 +0000

Hi Readers,

Today we are going to learn that if any class is not defined, even though you are trying to create object for that non existing class, then ruby raises an exception called "constant_missing".

const_missing – for Auto Loading Classes:

    def Object.const_missing(name)
      @looked_for ||= {}
      str_name = name.to_s
      raise "Class not found: #{name}" if @looked_for[str_name]
      @looked_for[str_name] = 1
      file = str_name.downcase
      require file
      klass = const_get(name)
      return klass if klass
      raise "Class not found: #{name}"
    end

eval and binding:

def evaluate_code(code, binding)
a = 2
eval code, binding
end

a = 1
evaluate_code("puts a", binding) # => 1

instance_eval:

require 'person_class'

andreas = Person.new("Andreas")

puts andreas.instance_eval { @name } # => Andreas

class_eval and module_eval:

    class Person
      def self.add_method(method)
        class_eval %Q{
          def #{method}
            puts "method #{method} invoked"
          end
        }
      end

      add_method(:say_hi)
    end

    Person.new.say_hi

Thank for reading it, hope you will practice and get some idea.

method_missing: A VCR and Using the VCR

noreply@blogger.com (Unknown) — Mon, 13 Jun 2016 11:45:00 +0000

Hi Readers,

Today we are going to take an example class VCR and verify the method_missing concept.

method_missing: A VCR

    class VCR
      def initialize
        @messages = []
      end

      def method_missing(method, *args, &block)
        @messages << [method, args, block]
      end

      def play_back_to(obj)
        @messages.each do |method, args, block|
          obj.send(method, *args, &block)
        end
      end
    end

Using the VCR:

    require 'vcr'

    vcr = VCR.new
    vcr.gsub! /Ruby/, "Crazy"
    vcr.upcase!
    object = "I Go Ruby"
    vcr.play_back_to(object)
    puts object

Just practice this example , i will get back to you with new concept.

Thanks for reading, subscribe this blog to get more updates.

Open Class Definitions and Method Aliasing

noreply@blogger.com (Unknown) — Fri, 10 Jun 2016 09:38:00 +0000

Hi readers,

In this post we are going to learn how to open existing class defination and alias the method which is exist already in the class.

Open Class Definitions and Method Aliasing:

    class Peter
      def say_hi
        puts "Hi"
      end
    end

    class Peter
      alias_method :say_hi_orig, :say_hi
      def say_hi
        puts "Before say hi"
        say_hi_orig
        puts "After say hi"
      end
    end

    Peter.new.say_hi

Core Classes are Also Open:

class Integer
def even?
(self % 2) == 0
end
end

p (1..10).select { |n| n.even? } # => [2, 4, 6, 8, 10]

Hope you understand the concept and you will practice this.

Thanks for reading this, if like share this.

RDoc and Option Parsing - Ruby on the Command Line

noreply@blogger.com (Unknown) — Thu, 09 Jun 2016 03:22:00 +0000

Hi Readers,

Today we are going to learn RDoc and Option Parsing, means ruby documentation and their options. In this we are also using ruby in command line.

RDoc and Option Parsing:

#!/usr/bin/env ruby
# == Synopsis
# This script takes photographs living locally on my desktop or laptop
# and publishes them to my homepage at http://marklunds.com.
#
# == Usage
#
# Copy config file publish-photos.yml.template to publish-photos.yml and edit as appropriate.
# ruby publish-photos [ -h | --help ] <photo_dir1> ... <photo_dirN>

# Load the Rails environment
require File.dirname(__FILE__) + '/../config/environment'
require 'optparse'
require 'rdoc/usage'

opts = OptionParser.new
opts.on("-h", "--help") { RDoc::usage('usage') }
opts.on("-q", "--quiet") { Log::Logger.verbose = false }
opts.parse!(ARGV) rescue RDoc::usage('usage')

Ruby on the Command Line:

# Query and replace
ruby -pi.bak -e "gsub(/Perl/, 'Ruby')" *.txt

# Grep
ruby -n -e "print if /Ruby/" *.txt
ruby -e "puts ARGF.grep(/Ruby/)" *.txt

Hope you will get this concepts.
Share this page. Place comment on it.

Dup method, Regular expressions and invoking external programs

noreply@blogger.com (Unknown) — Wed, 08 Jun 2016 04:59:00 +0000

The dup Method and Method Arguments:

    # Methods that change their receiver end with an exclamation mark by convention.
    # If you need to invoke an exclamation mark method on a method argument and you want
    # to avoid the object from being changed, you can duplicate the object first
    # with the Object#dup method. Core classes such as String, Hash, and Array all have
    # meaningful implementations of the dup method. Here is an example from Rails:

    class ActiveRecord::Base
      def attributes=(new_attributes)
        return if new_attributes.nil?
        attributes = new_attributes.dup # duplicate argument to avoid changing it
        attributes.stringify_keys! # modify the duplicated object
        # ... method continues here
      end
    end

Regular Expressions:

    "Ruby" =~ /^(ruby|python)$/i
    "Go\nRuby" =~ /Go\s+(\w+)/m; $1 == "Ruby"
    "I Go Ruby" =~ /go/i; $& == "Go"; $` == "I "; $' == " Ruby"
    pattern = "."; Regexp.new(Regexp.escape(pattern))
    "I Go Ruby"[/(go)/i, 1] == "Go"
    puts "I Go Ruby".gsub(%r{Ruby}, '\0 or I go bananas')
    "I Go Ruby".gsub(/ruby/i) { |lang| lang.upcase }
    line = "I Go Ruby"
    m, who, verb, what = *line.match(/^(\w+)\s+(\w+)\s+(\w+)$/)
    # \s, \d, [0-9], \w - space, digit, and word character classes
    # ?, *, +, {m, n}, {m,}, {m} - repetition

Invoking External Programs:

    system("ls -l")
    # $? is a predefined variable with the exit status
    puts $?.exitstatus if !$?.success?
    # The back ticks "`" return the output of the external program
    standard_out = `ls -l`

Hope you understand the concepts.

if like

else

comment

end

Thank You

Case statements, Blocks and String operations

noreply@blogger.com (Unknown) — Tue, 07 Jun 2016 06:24:00 +0000

Hi Readers,

Today we are going to learn how to write case statements in Ruby. Know about ruby blocks and some string operations with examples.

Case:

    x = 11
    case x
    when 0
    when 1, 2..5
      puts "Second branch"
    when 6..10
      puts "Third branch"
    when *[11, 12]
      puts "Fourth branch"
    when String: puts "Fifth branch"
    when /\d+\.\d+/
      puts "Sixth branch"
    when x.to_s.downcase == "peter"
      puts "Seventh branch"
    else
      puts "Eight branch"
    end

Blocks - Usage examples:

    # Iteration
    [1, 2, 3].each { |item| puts item }

    # Resource Management
    File.open("file.txt", "w") do |file|
      file.puts "foobar"
    end

    # Callbacks
    widget.on_button_press do
      puts "Got button press"
    end

    # Convention: one-line blocks use {...} and multiline
    # blocks use do...end

Common String Operations:

    " ".empty? == true
    IO.read(__FILE__).each_with_index { |line, i| puts "#{i}: #{line}" }
    "abc".scan(/./).each { |char| char.upcase }
    "we split words".split.join(", ")
    "    strip space   ".strip
    sprintf("value of %s is %.2f", "PI", 3.1416)
    "I Go Ruby"[2, 2] == "I Go Ruby"[2..3] # => "Go"

Hope you will understand this concepts. Next we will meet with different concept.

Please practice these to get hands on experience.

Share if you like else comment.

Ruby Conditional statements and Iterators

noreply@blogger.com (Unknown) — Mon, 06 Jun 2016 11:24:00 +0000

Hi Readers,

In this we are going to learn conditions and Iterators in Ruby. Please follow the below concepts.

if, unless, and the ? Operator

message = if count > 10
            "Try again"
          elsif tries == 3
            "You lose"
          else
            "Enter command"
          end

raise "Unauthorized" if !current_user.admin?
raise "Unauthorized" unless current_user.admin?

status = input > 10 ? "Number too big" : "ok"

Iterators: while, until, for, break, and next

while count < 100
puts count
count += 1
end

payment.make_request while (payment.failure? and payment.tries < 3)

for user in @users
next if user.admin?
if user.paid?
break
end
end

until count > 5
puts count
count += 1
end

Practice with different conditions,

Please share this to help others.

Ruby Range class, Structs and Exceptions

noreply@blogger.com (Unknown) — Mon, 06 Jun 2016 08:45:00 +0000

Hi readers,

In this post we are going to know about Range class, Structs in ruby and exceptions.

Range Class:

    # Two dots is inclusive, i.e. 1 to 5
    (1..5).each { |x| puts x**2 }

    # Three dots excludes the last item, i.e. 1 to 4
    (1...5).each { |x| puts x }

    (1..3).to_a == [1, 2, 3]

Structs:

    Rating = Struct.new(:name, :ratings)
    rating = Rating.new("Rails", [ 10, 10, 9.5, 10 ])

    puts rating.name
    puts rating.ratings

Exceptions:

    begin
      raise(ArgumentError, "No file_name provided") if !file_name
      content = load_blog_data(file_name)
      raise "Content is nil" if !content
    rescue BlogDataNotFound
      STDERR.puts "File #{file_name} not found"
    rescue BlogDataConnectError
      @connect_tries ||= 1
      @connect_tries += 1
      retry if @connect_tries < 3
      STDERR.puts "Invalid blog data in #{file_name}"
    rescue Exception => exc
      STDERR.puts "Error loading #{file_name}: #{exc.message}"
      raise
    end

Just can you practice above examples, then you will understand the concept, otherwise place comment on it.

Thank you share with your friends.

Ruby Symbols And More about Methods

noreply@blogger.com (Unknown) — Mon, 06 Jun 2016 07:49:00 +0000

Ruby Symbols:

# Symbols start with a colon
:action.class == Symbol
:action.to_s == "action"
:action == "action".to_sym

# There is only one instance of every symbol
:action.equal?(:action) # => true
'action'.equal?('action') # => false

# Symbols are typically used as keys in hashes
my_hash = {:controller => "home", :action => "index"}

More about Methods:

Arbitrary number of arguments: def my_methods(*args)
Converting Array to arguments: my_method([a, b]*)
Dynamic method invocation: object.send(:method_name)
Duck typing: object.respond_to?(:method_name)
If the last argument is a Hash, the braces can be omitted: link_to("Home", :controller => "home")

Hi readers,

hope you learn today post.

Leave comment or share.

Arithmetic and Conversions, String, Array and Hash

noreply@blogger.com (Unknown) — Fri, 03 Jun 2016 12:39:00 +0000

Arithmetic and Conversions:

    2.class == Fixnum
    Fixnum.superclass == Integer
    Integer.superclass == Numeric

    3.0.class == Float
    Float.superclass == Numeric

    2/3 == 0
    2/3.0 # => 0.6666667
    2 + 3.0 == 5.0
    "2".to_i + "3.0".to_f == 5.0

    10000000000.class == Bignum
    Bignum.superclass == Integer

    2 + "3" # => TypeError: String can't be coerced into Fixnum

String Class:

    "ruby".upcase + " " + "rails".capitalize # => RUBY Rails

    "time is: #{Time.now}\n second line"

    'no interpolation "here" #{Time.now}' # => no interpolation "here" #{Time.now}

    "I" << "Go" << "Ruby" # => IGoRuby

    %Q{"C" and "Java"} # => "C" and "Java"

    %q{single 'quoted'} # => single 'quoted'

    <<-END
        A here
        document at #{Time.now}
    END

Array Class:

    a = ["Ruby", 99, 3.14]
    a[1] == 99
    a << "Rails"
    ['C', 'Java', 'Ruby'] == %w{C Java Ruby}
    [1, 2, 3].map { |x| x**2 }.join(", ")
    [1, 2, 3].select { |x| x % 2 == 0 }
    [1, 2, 3].reject { |x| x < 3 }
    [1, 2, 3].inject { |sum, i| sum + i }

    [1, [2, 3]].flatten! # => [1, 2, 3]

    %w{C Java Ruby}.include?("C") # => true

    fruits = ['apple', 'banana']
    fruits += ['apple'] unless fruits.include?('apple')
    [1, 3, 5] & [1, 2, 3] # (intersection) => [1, 3]
    [1, 3, 5] | [2, 4, 6] # (union) => [1, 3, 5, 2, 4, 6]
    [1, 2, 3] - [2, 3] # (difference) => [1]

Hash Class:

h = {:lang => 'Ruby', :framework => 'Rails'}
h[:lang] == 'Ruby'
h[:perl] == nil
puts h.inspect
env = {"USER" => "peter", "SHELL" => "/bin/bash"}
env.each {|k, v| puts "#{k}=#{v}" }

Practice this i will get back to you with new concept.

Subscribe this blog for new updates.

Ruby Object, Constants and Introspection

noreply@blogger.com (Unknown) — Fri, 03 Jun 2016 07:10:00 +0000

Everything is an Object:

2 + 2 is equivalent to 2+(2) and 2.send(:+, 2)
2.hours.ago
2.class # => Fixnum
2.class.instance_methods – Object.instance_methods
“andreas”.capitalize

Constants:

Constants defined in a class/module are available within that class/module and outside the class with the scope operator ::
Constants defined outside any class/module can be accessed anywhere
Constants cannot be defined in methods

Introspection:

andreas = Person.new("Andreas")
andreas.inspect # => #<Person:0x1cf34 @name="Andreas">

andreas.class # => Person
andreas.class.superclass # => Object
andreas.class.superclass.superclass # => nil

andreas.class.ancestors.join(", ") # Person, Object, Kernel

Person.instance_methods(false) # => say_hi
Kernel.methods.sort.join("\n") # => All methods in Kernel module

Hope you learn something to day.

Follow this blog By subscribing.

Thanks

Ruby Modules and Modules vs Classes

noreply@blogger.com (Unknown) — Thu, 02 Jun 2016 09:25:00 +0000

Hi Readers,

Modules:

    require 'person_class'
    module HasAge
      attr_accessor :age
    end
    class Person
      include HasAge
    end
    peter = Person.new("Peter"); peter.age = 33; puts peter.age
    module MyApp
      class Person
        attr_accessor :hometown
        def initialize(hometown)
          self.hometown = hometown
        end
      end
    end
    peter = MyApp::Person.new("Stockholm"); puts peter.hometown

Modules vs Classes:

Modules model characteristics or properties of entities or things. Modules can’t be instantiated. Module names tend to be adjectives (Comparable, Enumerable etc.). A class can mix in several modules.

Classes model entities or things. Class names tend to be nouns. A class can only have one super class (Enumeration, Item etc.).

Hope you understand.

Thanks

Ruby - Assignment concept

noreply@blogger.com (Unknown) — Thu, 02 Jun 2016 06:59:00 +0000

Hi Readers,

Today we are going learn assignment of a variable value in ruby.

Assignment:

a, b = b, a # swapping values
a = 1; b = 1
a = b = 1
a += 1 # a = a + 1
a, b = [1, 2]
a = b || c
a ||= b

Idiom: Assignment with Boolean Expression

    comment = Object.new
    def comment.user
      Object.new
    end

    # Overly verbose:
    user_id = nil
    if comment
      if comment.user
        user_id = comment.user.object_id
      end
    end

    # Idiomatic:
    user_id = comment && comment.user && comment.user.object_id

Practice the above mentioned statements in irb.

Hope you like this.

Thank you

Naming Conventions and Boolean Expressions in Ruby

noreply@blogger.com (Unknown) — Wed, 01 Jun 2016 13:22:00 +0000

Hi Readers,

Remember these things while coding in Ruby. Naming convention is important for good programmer, once you wrote the code it should be in systematic way.

Naming Conventions:

MyClass
method_name, destructive_method!, question_method?, setter_method=
MY_CONSTANT = 3.14
local_variable = 3.14
@instance_variable
@@class_variable
$global_variable

Just check your previous code in ruby is written in this naming convention format or not. Practice the naming convention coding to better and clean understanding to others also.

Boolean Expressions:

All objects evaluate to true except false and nil
false and true are the only instances of FalseClass and TrueClass
Boolean expressions return the last evaluated object
a and b or c <=> (a and b) or c
a = b and c <=> (a = b) and c
a = b && c <=> a = (b && c)
puts a if a = b # Using assignments in boolean expressions
a = true; b = false; a and b and c() # => c() is never invoked

Good to know the details about the boolean expressions, why because in my experience i face lot of issues with boolean expressions, i found that lot of bugs reported in my past projects most of the bugs having the issue with boolean expressions, So get hands on experience on boolean expression.

Thank for reading.

If you like follow this blog.

Singleton Classes and Methods

noreply@blogger.com (Unknown) — Wed, 01 Jun 2016 12:59:00 +0000

Hi Readers,

In this post/page we are going to learn about singleton classes and their methods.

Example:

    require 'person'

    # Every object has two classes: the class of which it is an instance,

# and a singleton class.

# Methods of the singleton class are called singleton methods

    # and can only be invoked on that particular object.
    andreas = Person.new("Andreas")
    def andreas.andreas_says_hi
      "Andreas says hi"
    end
    andreas.andreas_says_hi

    # Class methods are singleton methods on the class
    # object and can be defined like this:
    def Person.count
      @@count ||= 0
    end
    puts Person.count

In our previous sessions example person class requiring in this, and we are defining a method with the class instance. So here Person in singleton class.

Just go through this example and practice it.

If you like follow the blog.

Thank you.

Ruby class methods

noreply@blogger.com (Unknown) — Wed, 01 Jun 2016 06:29:00 +0000

Hi Readers,

In this post you are going to learn how to define class methods and how to call those methods.

If you want to define a class method there are two ways.

1. Inside the class by using the self keyword
2. Inside the class by using "class << self"

Refer the below example to get the Info.

class Person
      def self.class_method
        puts "class method invoked"
      end

      class << self
        def class_method2; puts "class_method2"; end
        def class_method3; puts "class_method3"; end
      end
    end

    class << Person
      def class_method4; puts "class_method4"; end
    end

    # Invocation of class method
    Person.class_method

Just practice this, i will come back with new concept.
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Ruby Methods

noreply@blogger.com (Unknown) — Wed, 01 Jun 2016 05:51:00 +0000

Hi Readers,
Today we will know about the Ruby methods and parenthesis:

When invoking a method argument parenthesis are optional
Methods always have a receiver. The implicit receiver is self.
Methods are identified by their name only. No overloading on argument signatures.
There are class methods and instance methods
Methods can be public, protected, or private
The last evaluated expression in a method is the return value
Arguments can have default values: def my_method(a, b = {})

Methods and Parenthesis:

    def square(number)
      number * number
    end

    square(2+2)*2 # => square(4)*2 = 32
    square (2+2)*2 # => square(4*2) = 64

Method Visibility:

    class MyClass
      def method1 # Methods are public by default
      end
      # Protected methods can be invoked by any instance of the same class or a
      # subclass of MyClass
      protected
      def method2
      end
      # Private methods can only be invoked within an instance of MyClass or a subclass
      # of MyClass. The receiver of a private method is always self.
      private
      def method3
      end
    end

Hope you will understood, in next session i will come up with new concept.

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Thank you.

Variable/Method Ambiguity Gotcha

noreply@blogger.com (Unknown) — Tue, 31 May 2016 14:54:00 +0000

In the below mentioned program we are defining a variable called paid, while initializing the class object we are creating instance variable default value is false.

We have make_payment instance method defined here and inside that method we assigning value to the paid variable to true, just notice that in this method we are not overriding/replacing the actual instance variable so after calling the make_payment actual instance variable value won't change, if you try to print the paid value of instance will be false.

class Person
attr_accessor :paid
def initialize
@paid = false
end
def make_payment
puts "making payment..."
paid = true
end
end
person = Person.new
person.make_payment
puts "paid=#{person.paid}"

Try to execute the above code and practice it by changing the variables.

Hope you will understand, i will get back to you with new concept.

Ruby Attr_accessor

noreply@blogger.com (Unknown) — Tue, 31 May 2016 14:51:00 +0000

You can declare the attributes for the ruby class using the keyword 'attr_accessor'.

While initializing object you can assign the value to it. Check the following example and practice it.

class Person
attr_accessor :name
def initialize(name)
self.name = name
end
end
person = Person.new("Andreas")
puts person.name
person.name = "David"
puts person.name

Hope you will practice it, i will get back to you with new concept.

Ruby creator(Yukihiro Matsumoto) talk in Rubyconf India

noreply@blogger.com (Unknown) — Mon, 30 May 2016 15:16:00 +0000

Visit the video: Ruby creator(Yukihiro Matsumoto) talk in Rubyconf India

My Experience in RUBYCONF INDIA 2016

noreply@blogger.com (Unknown) — Mon, 30 May 2016 13:14:00 +0000

Hi Readers,

Rubyconf India is a global event complementing other RubyConf events across the world. I attended this event held on 19-20 march 2016. This was great opportunity to meet lot of rubiest.

I met lot of people who are started their career freshly and they want to share their opinions. Actually me and my friend went there 18 march afternoon, that was actual check in time they mentioned in the website.

That was nice hosting provided by le meridian hotel management. Food and accommodation was good. 18 march my friend me were having dinner that is around 9:00 P.m i think, My friend looking at one person standing in the dining hall and everyone wishing him to welcome India.

Finally my friend telling me that "Hey, he is Ruby creator 'Yukihiro Matsumoto'". Everyone calling him Matz. He is very simple and looking so tiered. Me and my friend went there to welcome him and take a photograph with him. Finally me and my friend got the photo of him.

Me and Yukihiro Matsumoto

Next day 19 march actual conference started, First talk was given by Matz, that was awesome, it went like funny and interesting. Matz was promising that in the next version of the ruby is going be more powerful, mainly his team focusing on the performance part there is no new features are introducing.

I observe that lot of people came to conf but most of them from Bengaluru, that to there are many startups of-course i am also one of them.

Some of the talks were boring and few of them are interesting. i am writing this things because i want share with you guys.