Ruby: kind_of? vs. instance_of? vs. is_a?

kind_of? and is_a? are synonymous.

instance_of? is different from the other two in that it only returns true if the object is an instance of that exact class, not a subclass.

Example:

  • "hello".is_a? Object and "hello".kind_of? Object return true because "hello" is a String and String is a subclass of Object.
  • However "hello".instance_of? Object returns false.

Related Posts:

  1. Get underlined text with Markdown
  2. What is the meaning of *nix?
  3. Get underlined text with Markdown
  4. What does the “map” method do in Ruby?
  5. How to write a switch statement in Ruby
  6. Rails 5 ActionController::InvalidAuthenticityToken error
  7. what does ? ? mean in ruby
  8. How to update Ruby Version 2.0.0 to the latest version in Mac OSX Yosemite?
  9. What does %w(array) mean?
  10. How to use “gets” and “gets.chomp” in Ruby
  11. Getting a substring in Ruby by x number of chars
  12. How to check whether a string contains a substring in Ruby
  13. Ruby: How to install a specific version of a ruby gem?
  14. ruby operator “=~” [duplicate]
  15. What is attr_accessor in Ruby?
  16. ActionController::UnknownFormat
  17. What does ||= (or-equals) mean in Ruby?
  18. How to read lines of a file in Ruby
  19. Array to Hash Ruby
  20. Ruby: undefined method `[]’ for nil:NilClass when trying to get Enumerator on an Array of Hashes
  21. How to map with index in Ruby?
  22. Ruby equivalent for Python’s “try”?
  23. What does “+=” (plus equals) mean?
  24. Rails 4 RoutingError: No Route Matches
  25. How to sum array of numbers in Ruby?
  26. Ruby array to string conversion
  27. How to check if a value exists in an array in Ruby
  28. undefined method (NoMethodError) ruby
  29. Multi-Line Comments in Ruby?
  30. How to uninstall ruby installed by ruby-install
  31. PG::ConnectionBad – could not connect to server: Connection refused
  32. Rails syntax error : unexpected keyword_ensure, expecting end-of-input
  33. Removing all installed Gems and starting over
  34. Ruby `send` vs `call` method
  35. What is the meaning of “do | |” in Ruby?
  36. RVM is not a function, selecting rubies with ‘rvm use …’ will not work
  37. How to delete specific characters from a string in Ruby?
  38. Rails: I installed Ruby, now “bundle install” doesn’t work
  39. How to do a newline in output
  40. Ruby: What is the easiest way to remove the first element from an array?
  41. Ruby String to Date Conversion
  42. p vs puts in Ruby
  43. Determining type of an object in ruby
  44. Fizz Buzz in Ruby for dummies
  45. How to Uninstall RVM? [duplicate]
  46. What is the “right” way to iterate through an array in Ruby?
  47. What is the difference between a Process’ pid, ppid, uid, euid, gid and egid?
  48. Equivalent of “continue” in Ruby
  49. What does the Ruby method ‘to_sym’ do?
  50. Difference between map and collect in Ruby?
  51. Creating and iterating a 2d array in Ruby
  52. What is the best way to convert an array to a hash in Ruby
  53. Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
  54. Getting error: dyld: Symbol not found: _clock_gettime
  55. Uninstall old versions of Ruby gems
  56. Uploading a file in Rails
  57. What is java interface equivalent in Ruby?
  58. Sort hash by key, return hash in Ruby
  59. Gem installation error: You have to install development tools first
  60. How to understand strptime vs. strftime
  61. How can I delete one element from an array by value
  62. How to break out from a ruby block?
  63. ERROR: While executing gem … (Gem::FilePermissionError)
  64. No such file or directory @ rb_sysopen ruby
  65. How to add to an existing hash in Ruby
  66. Ruby ‘require’ error: cannot load such file
  67. How to convert a string to lower or upper case in Ruby
  68. What is the canonical way to trim a string in Ruby without creating a new string?
  69. Difference between $stdout and STDOUT in Ruby
  70. No implicit conversion of String into Integer (TypeError)?
  71. Multi-Line Comments in Ruby?
  72. What does ‘super’ do in Python? – difference between super().__init__() and explicit superclass __init__()
  73. Is it possible to make abstract classes in Python?
  74. Inheriting constructors
  75. Inheriting constructors
  76. class << self idiom in Ruby
  77. What does << mean in Ruby?
  78. Cannot load such file — bcrypt_ext
  79. How do I remove Permission denied @ rb_sysopen – Gem install error?
  80. cannot declare variable ‘’ to be of abstract type ‘’
  81. Difference between “or” and || in Ruby?
  82. How to call a parent class function from derived class function?
  83. (The Triangle class) Design a class named Triangle that extends GeometricObject
  84. warning: constant ::Fixnum is deprecated When generating new model
  85. What is object slicing?
  86. super() fails with error: TypeError “argument 1 must be type, not classobj” when parent does not inherit from object
  87. Very basic inheritance: error: expected class-name before ‘{’ token
  88. Calling the base constructor in C#
  89. C++ – No appropriate default constructor available
  90. bcrypt LoadError: Cannot load such file
  91. Class template inheritance C++
  92. Inheritance and init method in Python
  93. What does @@variable mean in Ruby?
  94. Difference between rake db:migrate db:reset and db:schema:load
  95. TypeError: no implicit conversion of Symbol into Integer
  96. Array to Hash Ruby
  97. GROUP BY and COUNT using ActiveRecord
  98. Purge or recreate a Ruby on Rails database
  99. C++ calling base class constructors
  100. How to run Ruby code from terminal?

Leave a Comment

deneme bonusu veren sitelerbahis casinomakrobetceltabetpinbahispolobetpolobet girişpinbahis girişmakrobet girişpulibet girişmobilbahis girişkolaybet giriş