Is it possible to specify formatting options for to_yaml in ruby?

Question

The code

require \'yaml\'
puts YAML.load(\"
is_something:
  values: [\'yes\', \'no\']
\").to_yaml

produces

--- 
is_somethin         


        

Answer 1

About the hash options: see http://yaml4r.sourceforge.net/doc/page/examples.htm

Ex. 24: Using to_yaml with an options Hash

puts [[ 'Crispin', 'Glover' ]].to_yaml( :Indent => 4, :UseHeader => true, :UseVersion => true )
# prints:
#   --- %YAML:1.0
#   -
#       - Crispin
#       - Glover

Ex. 25: Available symbols for an options Hash

Indent: The default indentation to use when emitting (defaults to 2)
Separator: The default separator to use between documents (defaults to '---')
SortKeys: Sort Hash keys when emitting? (defaults to false)
UseHeader: Display the YAML header when emitting? (defaults to false)
UseVersion: Display the YAML version when emitting? (defaults to false)
AnchorFormat: A formatting string for anchor IDs when emitting (defaults to 'id%03d')
ExplicitTypes: Use explicit types when emitting? (defaults to false)
BestWidth: The character width to use when folding text (defaults to 80)
UseFold: Force folding of text when emitting? (defaults to false)
UseBlock: Force all text to be literal when emitting? (defaults to false)
Encoding: Unicode format to encode with (defaults to :Utf8; requires Iconv)