.increment vs += 1

by

The source of increment is below, which initializes attribute to zero if nil and adds the value passed as by (default is 1), it does not do save, so .save is still necessary.

def increment(attribute, by = 1)
  self[attribute] ||= 0
  self[attribute] += by
  self
end

Related Contents:

  1. How can I specify a local gem in my Gemfile?
  2. @ variables in Ruby on Rails
  3. Rails: Is there a rails trick to adding commas to large numbers?
  4. How to use RSpec’s should_raise with any kind of exception?
  5. Rails 4 Authenticity Token
  6. Ruby / Rails: convert int to time OR get time from integer?
  7. Trouble comparing time with RSpec
  8. JRuby on Rails vs. Ruby on Rails, what’s difference?
  9. All Ruby tests raising: undefined method `authenticate’ for nil:NilClass
  10. Rails: convert UTC DateTime to another time zone
  11. How to set default values in Rails?
  12. How to fix “Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5” while server starting
  13. Rails 5: ActiveRecord OR query
  14. Convert Time from one time zone to another in Rails
  15. Bundler: can’t find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException) during bundle install with gem
  16. Speeding up RSpec tests in a large Rails application
  17. Hash remove all except specific keys
  18. Difference between an it block and a specify block in RSpec
  19. Mongodb: What to know before using? [closed]
  20. Ruby: How to make a public static method?
  21. Run rake task in controller
  22. What exactly is Rake?
  23. Adding a custom seed file
  24. link_to method and click event in Rails
  25. Ruby on Rails scalability/performance? [closed]
  26. Rails 3. How to display two decimal places in edit form?
  27. Ruby JSON parse changes Hash keys
  28. Is there a Rails Console command (Rails 3+) to reload changed code?
  29. ‘require’: cannot load such file — ‘nokogiri\nokogiri’ (LoadError) when running `rails server`
  30. Rails: difference between ENV.fetch() and ENV[]
  31. Rubygems, Bundler and RVM confusion
  32. How do I use RVM and create globally available gems?
  33. How can I reload the current page in Ruby on Rails?
  34. How to remove gem from Ruby on Rails application?
  35. Rails Object Relationships and JSON Rendering
  36. How to add a delay to Rails controller for testing?
  37. Ruby on Rails – Can I modify data before it is saved?
  38. Where’s the best place to define a constant in a Ruby on Rails application?
  39. # TODO in rails
  40. RVM installed by Ruby not working?
  41. How to search an array in Ruby?
  42. Rebase Rails migrations in a long running project
  43. How to get request’s target controller and action with Rails 3?
  44. LDAP through Ruby or Rails
  45. Devise Custom Routes and Login Pages
  46. What does Post.all.map(&:id) mean? [duplicate]
  47. Rails Activeadmin – custom association select box
  48. rspec shared examples vs shared context
  49. guidelines for where to put classes in Rails apps that don’t fit anywhere
  50. What is the difference between build and new on Rails?

Leave a Comment