Ruby 1.9: What to Expect

OSCON 2008

{"a","b"} no longer supported

ruby 1.9

irb(main):002:0> {1,2}
SyntaxError: (irb):2: syntax error, unexpected ’,’, expecting tASSOC

ruby 1.8.6

irb(main):001:0> {1,2}
=> {1=>2}

Action: Convert to {1 => 2}