>>>>> "T" == Ted Meng <ted_meng / yahoo.com> writes:

T>  a=[1] until a.size != 1

T> ruby sees "a" as nil in "until" since somehow it
T> checks "until" before "a=[1]", am I right ?

 Yes, this is equivalent to

   until a.size != 1
      a = [1]
   end

 and 'begin a=[1] end until a.size != 1' is equivalent to

   begin
      a = [1]
   end until a.size != 1


Guy Decoux