How do I remove leading whitespace chars from Ruby HEREDOC?

by

The <<- form of heredoc only ignores leading whitespace for the end delimiter.

With Ruby 2.3 and later you can use a squiggly heredoc (<<~) to suppress the leading whitespace of content lines:

def test
  <<~END
    First content line.
      Two spaces here.
    No space here.
  END
end

test
# => "First content line.\n  Two spaces here.\nNo space here.\n"

From the Ruby literals documentation:

The indentation of the least-indented line will be removed from each
line of the content. Note that empty lines and lines consisting solely
of literal tabs and spaces will be ignored for the purposes of
determining indentation, but escaped tabs and spaces are considered
non-indentation characters.

More Related Contents:

  1. What does
  2. Why does white-space affect ruby function calls?
  3. Combining implicit wait and explicit wait together results in unexpected wait times
  4. Difference between class variables and class instance variables?
  5. Why use symbols as hash keys in Ruby?
  6. Where and how is the _ (underscore) variable specified?
  7. EventSource / Server-Sent Events through Nginx
  8. What exactly is the singleton class in ruby?
  9. How to install PostgreSQL’s pg gem on Ubuntu?
  10. Creating matrix with `Array.new(n, Array.new)`
  11. Unexpected keyword_end error, yet syntax seems fine
  12. Ruby 1.9 Array.to_s behaves differently?
  13. How do I parse a YAML file in Ruby?
  14. How do you downgrade rubygems?
  15. Safe ActiveRecord like query
  16. How to increase stack size for a ruby app. Recursive app getting: Stack level too deep (SystemStackError)
  17. Avoiding AppleScript through Ruby: rb-appscript or rubyosa?
  18. Best explanation of Ruby blocks? [closed]
  19. How do I create a SHA1 hash in ruby?
  20. Haml: Append class if condition is true in Haml
  21. to_s vs. to_str (and to_i/to_a/to_h vs. to_int/to_ary/to_hash) in Ruby
  22. How can I calculate the day of the week of a date in ruby?
  23. troubles with RVM and OpenSSL
  24. Set time zone offset in Ruby
  25. Print an XML document without the XML header line at the top
  26. What’s the precedence of ruby’s method call
  27. What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
  28. List of installed gems?
  29. What are those pipe symbols for in Ruby?
  30. Why isn’t current directory on my Ruby path? [duplicate]

Leave a Comment