- to introduce the Ruby on Rails
- MVC Architecture
- ActiveRecord
- ActionController
- ActionView
- ActionMailer
- Pagination
- Ajax
- Rails demo with project
More about the workshop will be updated through the posts, keep watching :-)
Showing posts with label ruby course. Show all posts
Showing posts with label ruby course. Show all posts
Friday, March 7
RoR Workshop @ Hyderabad - Twincling
I am planning for a workshop on Ruby on Rails introductory level. The agenda of the workshop is
More about the workshop will be updated through the posts, keep watching :-)
More about the workshop will be updated through the posts, keep watching :-)
Monday, January 7
Ruby on Rails Arrays and Hashes
Download the Examples
Arrays
Ruby has Arrays and Hashes to store/collect the objects.
And these objects are accessed using an index.
Array:
1. It is an ordered collection of objects.
2. Indexed with integers.
How to create an Array?
Answer is there are three different ways to create an array.
# Way 1 :
a1 = []
# Crosscheck whether we created the array "a1".
puts "a1 is an #{a1.class}"
# Way 2 :
a2 = [1,2,3]
# Crosscheck whether we created the array "a2".
puts "a2 is an #{a2.class}"
# Way 3 :
a3 = Array.new
# Crosscheck whether we created the array "a3".
puts "a3 is an #{a3.class}"
# Note:
# --> The array holds the objects within square brackets.
# --> The multiple objects separated with commas.
# --> The array holds different objects (int, float, string...).
# --> Way 1, creates an empty array.
# --> Way 2, creates an array with few objects defined/collected.
# --> Way 3, creates an empty array using ".new" operator/method.
# --> At any point to check whether we created array's or not, we can use ".class".
Exercise:
Well following are the built in methods that we can apply on to arrays.
&, *, +, -, <<, <=> , ==, [], [], []=, abbrev, assoc, at, clear, collect, collect!, compact , compact!, concat , dclone , delete, delete_at, delete_if, each, each_index, empty? , eql?, fetch , fill, first, flatten , flatten!, frozen? , hash include?, index , indexes, indices, initialize_copy , insert, inspect , join, last, length, map , map!, new, nitems , pack , pop, pretty_print, pretty_print_cycle, push , quote, rassoc, reject , reject!, replace, reverse, reverse! , reverse_each , rindex , select, shift, size , slice, slice!, sort , sort!, to_a , to_ary , to_s , to_yaml, transpose, uniq , uniq! , unshift, values_at, yaml_initialize, zip , .
Download the Examples
Hashes :
Ruby has Arrays and Hashes to store/collect the objects.
And these objects are accessed using an index.
# How to create an Hash?
# Answer is there are three different ways to create an Hash.
# Way 1 :
h1 = {}
# Crosscheck whether we created the Hash "h1".
puts "h1 is a #{h1.class}"
# Way 2 :
h2 = {
"Object1"=>"First Object",
"Object2"=>"Second Object"
}
# Crosscheck whether we created the Hash "h2".
puts "h2 is a #{h2.class}"
# Way 3 :
h3 = Hash.new
# Crosscheck whether we created the Hash "h3".
puts "h3 is a #{h3.class}"
# Note:
# --> The hash hold objects within curly braces.
# --> The Key and Value pair forms an object in Hash.
# --> The multiple objects separated with commas.
# --> The hash holds different data types.
# --> Way 1, creates an empty Hash.
# --> Way 2, creates an Hash with few objects defined/collected.
# --> Way 3, creates an empty Hash using ".new" operator/method.
# --> At any point to check whether we created Hash or not, we can use ".class".
Exercise on Hashes:
==, [], [], []=, clear, default, default=, default_proc, delete, delete_if, each, each_key, each_pair, each_value, empty?, fetch, has_key?, has_value?, include?, index, indexes, indices, initialize_copy, inspect, invert, key?, keys, length, member?, merge, merge!, new, pretty_print , pretty_print_cycle, rehash, reject, reject!, replace, select, shift, size, sort, store, to_a, to_hash, to_s, to_yaml, update, value?, values, values_at, yaml_initialize
Download the Examples
The zip file contains examples on Creating Arrays and Hashes, Methods implemented on arrays.
Note:
Arrays
Ruby has Arrays and Hashes to store/collect the objects.
And these objects are accessed using an index.
Array:
1. It is an ordered collection of objects.
2. Indexed with integers.
How to create an Array?
Answer is there are three different ways to create an array.
# Way 1 :
a1 = []
# Crosscheck whether we created the array "a1".
puts "a1 is an #{a1.class}"
# Way 2 :
a2 = [1,2,3]
# Crosscheck whether we created the array "a2".
puts "a2 is an #{a2.class}"
# Way 3 :
a3 = Array.new
# Crosscheck whether we created the array "a3".
puts "a3 is an #{a3.class}"
# Note:
# --> The array holds the objects within square brackets.
# --> The multiple objects separated with commas.
# --> The array holds different objects (int, float, string...).
# --> Way 1, creates an empty array.
# --> Way 2, creates an array with few objects defined/collected.
# --> Way 3, creates an empty array using ".new" operator/method.
# --> At any point to check whether we created array's or not, we can use ".class".
Exercise:
Well following are the built in methods that we can apply on to arrays.
&, *, +, -, <<, <=> , ==, [], [], []=, abbrev, assoc, at, clear, collect, collect!, compact , compact!, concat , dclone , delete, delete_at, delete_if, each, each_index, empty? , eql?, fetch , fill, first, flatten , flatten!, frozen? , hash include?, index , indexes, indices, initialize_copy , insert, inspect , join, last, length, map , map!, new, nitems , pack , pop, pretty_print, pretty_print_cycle, push , quote, rassoc, reject , reject!, replace, reverse, reverse! , reverse_each , rindex , select, shift, size , slice, slice!, sort , sort!, to_a , to_ary , to_s , to_yaml, transpose, uniq , uniq! , unshift, values_at, yaml_initialize, zip , .
Download the Examples
Hashes :
Ruby has Arrays and Hashes to store/collect the objects.
And these objects are accessed using an index.
# How to create an Hash?
# Answer is there are three different ways to create an Hash.
# Way 1 :
h1 = {}
# Crosscheck whether we created the Hash "h1".
puts "h1 is a #{h1.class}"
# Way 2 :
h2 = {
"Object1"=>"First Object",
"Object2"=>"Second Object"
}
# Crosscheck whether we created the Hash "h2".
puts "h2 is a #{h2.class}"
# Way 3 :
h3 = Hash.new
# Crosscheck whether we created the Hash "h3".
puts "h3 is a #{h3.class}"
# Note:
# --> The hash hold objects within curly braces.
# --> The Key and Value pair forms an object in Hash.
# --> The multiple objects separated with commas.
# --> The hash holds different data types.
# --> Way 1, creates an empty Hash.
# --> Way 2, creates an Hash with few objects defined/collected.
# --> Way 3, creates an empty Hash using ".new" operator/method.
# --> At any point to check whether we created Hash or not, we can use ".class".
Exercise on Hashes:
==, [], [], []=, clear, default, default=, default_proc, delete, delete_if, each, each_key, each_pair, each_value, empty?, fetch, has_key?, has_value?, include?, index, indexes, indices, initialize_copy, inspect, invert, key?, keys, length, member?, merge, merge!, new, pretty_print , pretty_print_cycle, rehash, reject, reject!, replace, select, shift, size, sort, store, to_a, to_hash, to_s, to_yaml, update, value?, values, values_at, yaml_initialize
Download the Examples
The zip file contains examples on Creating Arrays and Hashes, Methods implemented on arrays.
Note:
- Please comment/un comment the wanted/un necessary puts, for better understanding.
Friday, December 7
Ruby on Rails - What is Ruby?
So, I am not just going to stop by providing the Ruby on Rails course structure.
I am here to start sharing the concepts what I understood about Ruby on Rails.
A gentle disclaimer, Nobody is perfect and in my attempt to become close to perfection I relied on world wide web to learn better and to understand the concepts clearly.
So let's start today with Introduction topic and discuss more on What is Ruby? If you are in hurry you can download What is Ruby?
I am here to start sharing the concepts what I understood about Ruby on Rails.
A gentle disclaimer, Nobody is perfect and in my attempt to become close to perfection I relied on world wide web to learn better and to understand the concepts clearly.
So let's start today with Introduction topic and discuss more on What is Ruby? If you are in hurry you can download What is Ruby?
Initially Some History about Ruby:
The language was created by Yukihiro "Matz" Matsumoto, who started working on Ruby on February 24, 1993, and released it to the public in 1995. "Ruby" was named as a gemstone because of a joke within Matsumoto's circle of friends alluding to Perl's name.
Some useful links that come handy when you are going through the course material:
Compiled Language : http://en.wikipedia.org/wiki/Compiled_language
Compilers : http://en.wikipedia.org/wiki/Compiler
Interpreters : http://en.wikipedia.org/wiki/Interpreter_%28computing%29
Object Oriented Programming : http://en.wikipedia.org/wiki/Object-oriented
Ruby, Interpreters, Compilers, Scripting Language, Compiled Language, Mixins, Operating System, Unix, Linux, Modules, Closures, Threads, Exceptions, Garbage Collectors,
Reach me @ tosumanthkrishnaATgmailDOTcom for more discussions.
Ruby is "an interpreted scripting language for quick and easy object-oriented programming".Don’t be alarmed. We will take one by one:
Interpreted Scripting Language:
- Powerful string operations and regular expressions
- Immediate feedback during development
- Ruby programs can be executed from source code.(means to say need not be compiled)
- Everything is an object
- Classes, inheritance, methods, etc.
- Singleton methods
- Mixin by module
- Iterators and closures
- Runs on many different operating systems.
- Windows 95 through XP, Linux, UNIX...
- Variables are not typed
- Syntax is simple and consistent (like you are expressing something)
- Automatic memory allocation and garbage collection
- Exception processing model
- Dynamic loading
- Threads
Reach me @ tosumanthkrishnaATgmailDOTcom for more discussions/tips/suggestions.
Subscribe to:
Posts (Atom)
