optional parameters in 1.8.7 and 1.9

Comment

Apparently you can have optional parameter listed in the middle for your method in Ruby version 1.9

C:\>pik switch 191
 
C:\>irb
irb(main):001:0> def talk(a,*b,c)
irb(main):002:1>   p a,b,c
irb(main):003:1> end
=> nil
irb(main):004:0> talk 'a','b','c'
"a"
["b"]
"c"
=> ["a", ["b"], "c"]

but not Ruby version 1.8.7

C:\>pik switch 187
C:\>irb
irb(main):001:0> def talk(a,*b,c)
irb(main):002:1>   p a,b,c
irb(main):003:1> end
SyntaxError: compile error
(irb):1: syntax error, unexpected tIDENTIFIER, expecting tAMPER or '&'
def talk(a,*b,c)
               ^
        from (irb):1
irb(main):004:0> quit

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