# \[\]\[1,&nil\] = 2

**URL:** <https://www.ruby-forum.com/t/1-nil-2/108155>\
**Category:** Development\
**Created:** [June 29, 2007, 2:36pm UTC](https://www.ruby-forum.com/t/1-nil-2/108155 "2007-06-29T14:36:23Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**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:** [June 29, 2007, 2:36pm UTC](https://www.ruby-forum.com/t/1-nil-2/108155/1 "2007-06-29T14:36:23Z")

</div>

e$B0J2\<$N$h$&$Ke(B [][1,&nil] = 2 e$B$H$9$k$H!"e(Bnil e$B$Ke(B []=  
e$B$,$J$$$H$$e(B  
e$B$&%(%i!\<$K$J$k$N$O0U?^$;$6$k$b$N$G$O$J$$$G$7$g$&$+!#e(B

% ./ruby -ve ‘[][1,&nil] = 2’  
ruby 1.9.0 (2007-06-29 patchlevel 0) [i686-linux]  
-e:1:in `method_missing': undefined method`[]=’ for nil:NilClass  
(NoMethodError)  
from -e:1:in `’

---

<div class="post-metadata">

**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:** [July 2, 2007, 4:12pm UTC](https://www.ruby-forum.com/t/1-nil-2/108155/2 "2007-07-02T16:12:58Z")

</div>

e$B!!$5$5$@$G$9!#e(B

Tanaka A. wrote:

> e$B0J2\<$N$h$&$Ke(B [][1,&nil] = 2 e$B$H$9$k$H!"e(Bnil e$B$Ke(B []= e$B$,$J$$$H$$e(B  
> e$B$&%(%i!\<$K$J$k$N$O0U?^$;$6$k$b$N$G$O$J$$$G$7$g$&$+!#e(B
> 
> % ./ruby -ve ‘[][1,&nil] = 2’  
> ruby 1.9.0 (2007-06-29 patchlevel 0) [i686-linux]  
> -e:1:in `method_missing': undefined method`[]=’ for nil:NilClass (NoMethodError)  
> from -e:1:in `’

e$B!!$3$l$O!“B?J,%Q!\<%5%(%i!\<$+%3%s%Q%$%k%(%i!\<$K$J$k$Y$-$@$H;W$&e(B  
e$B$N$G$9$,!J0c$$$^$9!)!K!”$I$&$7$^$7$g$&!d$^$D$b$H$5$se(B

---

<div class="post-metadata">

**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:** [September 25, 2007, 11:09pm UTC](https://www.ruby-forum.com/t/1-nil-2/108155/3 "2007-09-25T23:09:57Z")

</div>

e$B!!$5$5$@$G$9!#e(B

Yukihiro M. wrote:

> |e$B!!$3$l$O!“B?J,%Q!\<%5%(%i!\<$+%3%s%Q%$%k%(%i!\<$K$J$k$Y$-$@$H;W$&e(B  
> |e$B$N$G$9$,!J0c$$$^$9!)!K!”$I$&$7$^$7$g$&!d$^$D$b$H$5$se(B
> 
> e$B$=$&$J$s$G$9$+!)e(B
> 
> []e$B$H$$$&%_%V%8%’%/%H$Ne(B[]=e$B$H$$$&%a%=%C%I$,0z?te(B(1,2)e$B$G%V%m%C%/e(B  
> e$BIU$-e(B(e$B$^!“e(Bnile$B$@$1$Ie(B)e$B$G8F$P$l$F$$$k$H2r\<a$G$-$k$s$G!”$3$l$r%3%se(B  
> e$B%Q%$%k%(%i!\<$K$9$kM}M3$O$J$$$h$&$K;W$&$N$G$9$,!#@8@.$7$F$$$ke(B  
> e$B%N!\<%I$,$_$+$7$$$H$$$&$3$H$O$"$k$+$b$7$l$^$;$s!#e(B

e$B!!$"$"!“0U?^E\*$G$7$?$i$$$$$G$9!#@Q6KE\*$K!V%(%i!\<$K$9$k$Y$-!W$He(B  
e$B$$$&:,5r$O$”$j$^$;$s!#e(B

e$B!!$8$c$!!"F0$/$h$&$KBP1~$7$F$\*$-$^$9!#e(B

---

<div class="post-metadata">

**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:** [September 25, 2007, 11:04pm UTC](https://www.ruby-forum.com/t/1-nil-2/108155/4 "2007-09-25T23:04:08Z")

</div>

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:31112] Re: [][1,&nil] = 2”  
on Mon, 2 Jul 2007 22:49:22 +0900, SASADA Koichi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|Tanaka A. wrote:  
|\> e$B0J2\<$N$h$&$Ke(B [][1,&nil] = 2 e$B$H$9$k$H!"e(Bnil e$B$Ke(B []= e$B$,$J$$$H$$e(B  
|\> e$B$&%(%i!\<$K$J$k$N$O0U?^$;$6$k$b$N$G$O$J$$$G$7$g$&$+!#e(B  
|\>  
|\> % ./ruby -ve ‘[][1,&nil] = 2’  
|\> ruby 1.9.0 (2007-06-29 patchlevel 0) [i686-linux]  
|\> -e:1:in `method_missing': undefined method `[]=’ for nil:NilClass (NoMethodError)  
|\> from -e:1:in `’  
|  
|e$B!!$3$l$O!“B?J,%Q!\<%5%(%i!\<$+%3%s%Q%$%k%(%i!\<$K$J$k$Y$-$@$H;W$&e(B  
|e$B$N$G$9$,!J0c$$$^$9!)!K!”$I$&$7$^$7$g$&!d$^$D$b$H$5$se(B

e$B$=$&$J$s$G$9$+!)e(B

[]e$B$H$$$&%_%V%8%'%/%H$Ne(B[]=e$B$H$$$&%a%=%C%I$,0z?te(B(1,2)e$B$G%V%m%C%/e(B  
e$BIU$-e(B(e$B$^!“e(Bnile$B$@$1$Ie(B)e$B$G8F$P$l$F$$$k$H2r\<a$G$-$k$s$G!”$3$l$r%3%se(B  
e$B%Q%$%k%(%i!\<$K$9$kM}M3$O$J$$$h$&$K;W$&$N$G$9$,!#@8@.$7$F$$$ke(B  
e$B%N!\<%I$,$_$+$7$$$H$$$&$3$H$O$"$k$+$b$7$l$^$;$s!#e(B