Iterate over Ruby Time object with delta

by

Prior to 1.9, you could use Range#step:

(start_time..end_time).step(3600) do |hour|
  # ...
end

However, this strategy is quite slow since it would call Time#succ 3600 times. Instead,
as pointed out by dolzenko in his answer, a more efficient solution is to use a simple loop:

hour = start_time
while hour < end_time
  # ...
  hour += 3600
end

If you’re using Rails you can replace 3600 with 1.hour, which is significantly more readable.

More Related Contents:

  1. Reassigning the value of variables in Ruby?
  2. What is attr_accessor in Ruby?
  3. Ruby: String Comparison Issues
  4. Ruby 2.0.0p0 IRB warning: “DL is deprecated, please use Fiddle”
  5. How to get the name of the calling method?
  6. What are all the common ways to read a file in Ruby?
  7. Why is `a = a` `nil` in Ruby?
  8. Cannot call non W3C standard command while in W3C mode (Selenium::WebDriver::Error::UnknownCommandError) with Selenium ChromeDriver in Cucumber Ruby
  9. What exactly is `&:capitalize` in Ruby?
  10. Ruby’s File.open and the need for f.close
  11. Difference between map and collect in Ruby?
  12. How does “(1..4).inject(&:+)” work in Ruby
  13. What does __FILE__ mean in Ruby?
  14. Is sort in Ruby stable?
  15. How to check whether a string contains a substring in Ruby
  16. How to get a specific output iterating a hash in Ruby?
  17. Does Ruby perform Tail Call Optimization?
  18. How do I use define_method to create class methods?
  19. Ruby Email validation with regex
  20. How do I stub things in MiniTest?
  21. When to use each method of launching a subprocess in Ruby
  22. Ruby run shell command in a specific directory
  23. Check if URL exists in Ruby
  24. Using Ruby Symbols
  25. Ruby: Merging variables in to a string
  26. how to convert 270921sec into days + hours + minutes + sec ? (ruby)
  27. Cannot install thin on windows
  28. Ruby’s File.open gives “No such file or directory – text.txt (Errno::ENOENT)” error
  29. What are the benefits of the new hash syntax in Ruby 1.9?
  30. How do I compare two hashes?

Leave a Comment