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Person = Class.new do | |
#instance method | |
def say_hi | |
puts "Hi, Do you like Ruby?" | |
end | |
end | |
Person.new.say_hi |
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module A | |
def say_hi(a,b,c) | |
puts "Hi, from [A] module. Numbers - #{a} #{b} #{c}" | |
end | |
end | |
class B | |
include A | |
def say_hi(a,b,c) |
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module A | |
def say_hi(a,b,c) | |
puts "Hi, from [A] module. Numbers - #{a} #{b} #{c}" | |
end | |
end | |
class B | |
include A | |
def say_hi(a,b,c) |
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module A | |
def say_hi(a,b,c) | |
puts "Hi, from [A] module. Numbers - #{a} #{b} #{c}" | |
end | |
end | |
class B | |
include A | |
def say_hi(a,b,c) |
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module A | |
def say_hi(a,b,c) | |
puts "Hi, from [A] module. Numbers - #{a} #{b} #{c}" | |
end | |
end | |
class B | |
include A | |
def say_hi(a,b,c) |
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class Person | |
def say_hi | |
puts "Hi, this is Ruby!" | |
end | |
end | |
john = Person.new | |
robin = Person.new | |
john.say_hi # => Hi, this is Ruby! |
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class MyClass | |
def my_instance_method | |
puts "this is an instance method" | |
end | |
#self here is MyClass | |
class << self | |
def count_objects | |
"counting objects..DONE" |
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$ bundle install | |
Fetching source index for http://rubygems.org/ | |
Installing rake (0.9.2) | |
Installing abstract (1.0.0) | |
Installing activesupport (3.0.5) | |
Installing builder (2.1.2) | |
Installing i18n (0.6.0) | |
Installing activemodel (3.0.5) | |
Installing erubis (2.6.6) | |
Installing rack (1.2.3) |
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ruby-1.9.2-p180 :001 > Account.find(34) | |
ActiveRecord::RecordNotFound: Couldn't find Account with ID=34 | |
from /Users/lakshman/.rvm/gems/ruby-1.9.2-p180/gems/activerecord-3.0.5/lib/active_record/relation/finder_methods.rb:296:in `find_one' | |
from /Users/lakshman/.rvm/gems/ruby-1.9.2-p180/gems/activerecord- | |
ruby-1.9.2-p180 :002 > Account.where(:id => 34).first | |
=> nil | |
ruby-1.9.2-p180 :003 > Account.where(:id => 34) | |
=> [] |
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def my_awesome_method | |
ret = lambda { return "This is returned from Lambda" } | |
ret.call | |
"This line will run" | |
end | |
puts my_awesome_method | |
# => "This is returned from Lambda" | |
# => "This line will run" |