x = [0,1,2,3,4,5]; x << x e$B$H$7$F:n$C$?:F5"E*$JG[Ns$re(B puts e$B$9e(B
e$B$k$He(B […] e$B$,$$$/$D$b=P$F$-$^$9!#e(B
% ./ruby -ve ‘x = [0,1,2,3,4,5]; x << x; puts x’
ruby 1.9.0 (2008-05-02 revision 16276) [i686-linux]
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1.8 e$B$@$H=P$F$-$^$;$s!#e(B
% ruby-1.8 -ve ‘x = [0,1,2,3,4,5]; x << x; puts x’
ruby 1.8.7 (2008-05-02 patchlevel 5000) [i686-linux]
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