# Uniq with subclass of Array

**URL:** <https://www.ruby-forum.com/t/uniq-with-subclass-of-array/136545>\
**Category:** Development\
**Created:** [May 3, 2008, 12:53pm UTC](https://www.ruby-forum.com/t/uniq-with-subclass-of-array/136545 "2008-05-03T12:53:50Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 3, 2008, 12:53pm UTC](https://www.ruby-forum.com/t/uniq-with-subclass-of-array/136545/1 "2008-05-03T12:53:50Z")

</div>

e$B0J2\<$N$h$&$K!"e(BArray e$B$N%5%V%/%i%9$Ke(B uniq  
e$B$r8F$S=P$9$H!"e(BArray  
e$B$N%$%s%9%?%s%9$,JV$C$F$-$^$9!#e(B

% ./ruby -ve ‘class A \< Array; end; p A[1,2].uniq.class’  
ruby 1.9.0 (2008-05-02 revision 16277) [i686-linux]  
Array

1.8 e$B$G$O%5%V%/%i%9$N%$%s%9%?%s%9$,JV$C$F$-$^$9!#e(B

% ruby-1.8 -ve ‘class A \< Array; end; p A[1,2].uniq.class’  
ruby 1.8.7 (2008-05-02 patchlevel 5000) [i686-linux]  
A