What evaluates to false in Ruby?

by

false and nil are the only ones:

http://www.ruby-doc.org/core-2.1.1/FalseClass.html

Rails provides present? which also includes empty strings and empty arrays: http://api.rubyonrails.org/classes/Object.html#method-i-present-3F

More Related Contents:

  1. Ruby syntax error, unexpected tIDENTIFIER, expecting end-of-input
  2. How to pass command line arguments to a rake task
  3. Parsing a JSON string in Ruby
  4. How to set TLS context options in Ruby (like OpenSSL::SSL::SSL_OP_NO_SSLv2)
  5. Ruby: kind_of? vs. instance_of? vs. is_a?
  6. Why does installing Nokogiri on Mac OS fail with libiconv is missing?
  7. Pass variables to Ruby script via command line
  8. What is the difference between Ruby 1.8 and Ruby 1.9
  9. How do I get the match data for all occurrences of a Ruby regular expression in a string?
  10. Why isn’t the eigenclass equivalent to self.class, when it looks so similar?
  11. Open an IO stream from a local file or url
  12. Performance of Arrays and Hashes in Ruby
  13. Ruby max integer
  14. Ruby Regular expression to match a url [duplicate]
  15. What do you call the -> operator in Ruby?
  16. Understanding Ruby’s load paths
  17. Why is this RMagick call generating a segmentation fault?
  18. git, Heroku: pre-receive hook declined
  19. Understanding private methods in Ruby
  20. Iterate through every file in one directory
  21. Running a command from Ruby displaying and capturing the output
  22. In Rails, how to add a new method to String class?
  23. Why isn’t self always needed in ruby / rails / activerecord?
  24. Ruby factorial function
  25. Read, edit, and write a text file line-wise using Ruby
  26. Ruby: filter array by regex?
  27. Overriding method by another defined in module
  28. What will give me something like ruby readline with a default value?
  29. Is it possible to have class.property = x return something other than x?
  30. Functional code examples in ruby

Leave a Comment