A, a = 1, 2

e$B$U$H5$$,$D$$$?$s$G$9$,!"e(Ba, a = 1, 2 e$B$H$9$k$H!"e(B1.8 e$B$He(B
1.9 e$B$Ge(B
e$B5sF0$,0c$&$h$&$G$9!#0U?^$5$l$?$3$H$G$7$g$&$+!#e(B

% ./ruby -ve ‘a, a = 1, 2; p a’
ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
1

% ruby-1.8 -ve ‘a, a = 1, 2; p a’
ruby 1.8.6 (2007-08-18 patchlevel 5000) [i686-linux]
2

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:31522] a, a = 1, 2”
on Aug.20,2007 17:31:34, [email protected] wrote:
| e$B$U$H5$$,$D$$$?$s$G$9$,!"e(Ba, a = 1, 2 e$B$H$9$k$H!"e(B1.8 e$B$He(B 1.9 e$B$Ge(B
| e$B5sF0$,0c$&$h$&$G$9!#0U?^$5$l$?$3$H$G$7$g$&$+!#e(B
|
| % ./ruby -ve ‘a, a = 1, 2; p a’
| ruby 1.9.0 (2007-08-19 patchlevel 0) [i686-linux]
| 1
|
| % ruby-1.8 -ve ‘a, a = 1, 2; p a’
| ruby 1.8.6 (2007-08-18 patchlevel 5000) [i686-linux]
| 2

e$B<+A0$N%9%/%j%W%H72$rD/$a$F$$k$H!"8=:$Ne(Btrunke$B$G$Ne(B
*, a = 1, 2
e$B$KAjEv$9$k5-=R$H$7$FMxMQ$7$F$$$?;~4|$,$"$C$?$h$&$G!“7k9=$3$Ne(B
e$B5sF0$rMxMQ$7$F$$$^$7$?!#e(B
e$B$H$$$&$o$1$G!”=>Mh$N5sF0$rJ]$C$F$$$?$@$1$k$H4r$7$$$G$9!#e(B

e$B$=$l$G$O!#e(B

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

U.Nakamura wrote:

|
| % ruby-1.8 -ve ‘a, a = 1, 2; p a’
| ruby 1.8.6 (2007-08-18 patchlevel 5000) [i686-linux]
| 2

e$B<+A0$N%9%/%j%W%H72$rD/$a$F$$k$H!"8=:$Ne(Btrunke$B$G$Ne(B
*, a = 1, 2
e$B$KAjEv$9$k5-=R$H$7$FMxMQ$7$F$$$?;~4|$,$"$C$?$h$&$G!“7k9=$3$Ne(B
e$B5sF0$rMxMQ$7$F$$$^$7$?!#e(B
e$B$H$$$&$o$1$G!”=>Mh$N5sF0$rJ]$C$F$$$?$@$1$k$H4r$7$$$G$9!#e(B

e$B!!%P%$%H%3!<%IE*$K$O!"e(B

push 1
push 2
set a # (a = 2)
set a # (a = 1)

e$B$H$J$j$^$9!#=>Mh$N5sF0$r<i$k$?$a$K$O!"$?$V$s2?$+$7$i$N%!<%P%X%C%I$,e(B
e$B$+$+$k$N$G$d$j$?$/$J$$$J$!!"$H$$$&$N$,8D?ME
$J46>p$G$9!#$H$$$&$+!“B?e(B
e$B=EBeF~$N%3!<%I$rA4It=q$-D>$5$J$$$H$$$1$J$$$h$&$J5$$,$9$k$N$G!”$"$^$je(B
e$B9M$($?$/$"$j$^$;$s!#e(B

e$BB?=EBeF~$GF1$8JQ?t$X$NBeF~$,$"$C$?$ie(BParseErrore$B$G$bEj$2$k$h$&$Ke(B

e$B$7$?$i!"?’!9$H9,$;$K$J$k$N$+$7$i$s!#e(B

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

In message “Re: [ruby-dev:31528] Re: a, a = 1, 2”
on Mon, 20 Aug 2007 20:44:27 +0900, SASADA Koichi [email protected]
writes:

|> e$B$H$$$&$o$1$G!“=>Mh$N5sF0$rJ]$C$F$$$?$@$1$k$H4r$7$$$G$9!#e(B
|
|e$B!!%P%$%H%3!<%IE*$K$O!“e(B
|
|push 1
|push 2
|set a # (a = 2)
|set a # (a = 1)
|
|e$B$H$J$j$^$9!#=>Mh$N5sF0$r<i$k$?$a$K$O!”$?$V$s2?$+$7$i$N%!<%P%X%C%I$,e(B
|e$B$+$+$k$N$G$d$j$?$/$J$$$J$!!"$H$$$&$N$,8D?ME
$J46>p$G$9!#$H$$$&$+!“B?e(B
|e$B=EBeF~$N%3!<%I$rA4It=q$-D>$5$J$$$H$$$1$J$$$h$&$J5$$,$9$k$N$G!”$”$^$je(B
|e$B9M$($?$/$"$j$^$;$s!#e(B

e$B$H!"$O$C$-$jCG8@$7$F$$$k$H$3$m$G$?$$$X$s8@$$$K$/$$$N$G$9$,!"e(B
e$B$3$3$O@'HsBP1~$7$F$b$i$$$?$$$G$9!#e(B

Rubye$B$NFCD’$H$7$Fe(B(e$B8zN($r5>@7$K$7$F$G$be(B)e$B<B9T=g=x$rJ]>Z$9$k$H$$e(B
e$B$&$H$3$m$,$“$C$F!”$?$H$($P0z?tI>2A$b@dBP$K:8$+$i1&$K$J$C$F$$e(B
e$B$^$9!#$3$3$GBeF~e(B(e$B$7$+$bI{:nMQ$,$“$k>l9g$b$”$ke(B)e$B$@$1=g=x$rJ]>Ze(B
e$B$7$J$$$H$J$k$H!";H$$>!<j$,$+$J$j2<$,$j$^$9!#Bg$,$+$j$K$J$k$Ne(B
e$B$b!"BgJQ$J$N$bM}2r$G$-$^$9$,!“M%@hEY$ODc$/$F$b$h$$$N$G!”$=$Ne(B
e$B$&$A$K$G$bBP1~$7$F$/$@$5$$!#e(B

|# e$BB?=EBeF~$GF1$8JQ?t$X$NBeF~$,$“$C$?$ie(BParseErrore$B$G$bEj$2$k$h$&$Ke(B
|# e$B$7$?$i!”?'!9$H9,$;$K$J$k$N$+$7$i$s!#e(B

e$B$&!<$s!"I{:nMQ$r4|BT$7$F$kJQBV$J?M$b$$$k$+$b$7$l$^$;$s$+$i!"e(B
e$B$$$A$,$$$K%(%i!<$G:Q$`$H$$$&$o$1$K$O$$$+$J$$$+$b$7$l$^$;$s!#e(B

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:31528] Re: a, a = 1, 2”
on Aug.20,2007 20:44:27, [email protected] wrote:
| > e$B<+A0$N%9%/%j%W%H72$rD/$a$F$$k$H!"8=:$Ne(Btrunke$B$G$Ne(B
| > , a = 1, 2
| > e$B$KAjEv$9$k5-=R$H$7$FMxMQ$7$F$$$?;~4|$,$"$C$?$h$&$G!“7k9=$3$Ne(B
| > e$B5sF0$rMxMQ$7$F$$$^$7$?!#e(B
| > e$B$H$$$&$o$1$G!”=>Mh$N5sF0$rJ]$C$F$$$?$@$1$k$H4r$7$$$G$9!#e(B
|
| e$B!!%P%$%H%3!<%IE
$K$O!“e(B
|
| push 1
| push 2
| set a # (a = 2)
| set a # (a = 1)
|
| e$B$H$J$j$^$9!#=>Mh$N5sF0$r<i$k$?$a$K$O!”$?$V$s2?$+$7$i$N%!<%P%X%C%I$,e(B
| e$B$+$+$k$N$G$d$j$?$/$J$$$J$!!"$H$$$&$N$,8D?ME
$J46>p$G$9!#$H$$$&$+!“B?e(B
| e$B=EBeF~$N%3!<%I$rA4It=q$-D>$5$J$$$H$$$1$J$$$h$&$J5$$,$9$k$N$G!”$“$^$je(B
| e$B9M$($?$/$”$j$^$;$s!#e(B

e$B$D$^$j<BAu$NET9g$G;EMM$rJQ$($?$$!"$H$$$&$3$H$G$9$h$M!#e(B
e$B$=$3$s$H$3$O$H$F$b$h$/M}2r$G$-$k$N$G0l35$KH]Dj$O$7$^$;$s!#e(B

| # e$BB?=EBeF~$GF1$8JQ?t$X$NBeF~$,$“$C$?$ie(BParseErrore$B$G$bEj$2$k$h$&$Ke(B
| # e$B$7$?$i!”?'!9$H9,$;$K$J$k$N$+$7$i$s!#e(B

ParseErrore$B$O$I$&$+$H;W$&$N$G$9$,!"2?$i$+$N7Y9p$r=P$9$N$O$$$$e(B
e$B$+$b$7$l$^$;$s!#e(B

e$B$=$l$G$O!#e(B

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

SASADA Koichi wrote:

e$B!!$&$&!$$o$+$j$^$7$?!%$?$@!$$I$&$K$b8zN($N$$$$0F$,;W$$$D$+$J$$!J$3$le(B
e$B$Oe(BFIFOe$B$J%G!<%?=hM}$r%9%?%C%/%^%7%s$G$d$m$&!$$C$FOC$G$9$h$M!K$N$G!$$Ie(B
e$B$J$?$+!$$$$$0F$,$"$C$?$i!$$I$&$+65$($F$/$@$5$$!%e(B

e$B!!$3$&=q$$$?$H$?$s$G62=L$G$9$,!$e(B

  1. e$B1&JU$,=EJ#$7$J$$%m!<%+%kJQ?t$NNs$@$C$?$i:#$^$GDL$je(B
    e$B!!!JI{:nMQ$O$J$$$N$GLdBj$J$$!Ke(B
  2. e$B$=$&$8$c$J$1$l$P!$?’!9%3%9%H$r$+$1$F=gHVDL$j$K<B9Te(B

e$B$H$$$&$3$H$K$7$?$$$H;W$$$^$9!%B?J,!$e(B(1)
e$B$,$[$H$s$I$G$O$J$$$+$H4|BT!%e(B
e$B%M%9%H$7$?B?=EBeF~$Oe(B (1)
e$B$K$O$"$F$O$^$j$^$;$s$,!$$^$!$7$g$&$,$J$$!%e(B

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

Yukihiro M. wrote:

e$B$H!"$O$C$-$jCG8@$7$F$$$k$H$3$m$G$?$$$X$s8@$$$K$/$$$N$G$9$,!"e(B
e$B$3$3$O@'HsBP1~$7$F$b$i$$$?$$$G$9!#e(B

e$B!!$&$&!$$o$+$j$^$7$?!%$?$@!$$I$&$K$b8zN($N$$$$0F$,;W$$$D$+$J$$!J$3$le(B
e$B$Oe(BFIFOe$B$J%G!<%?=hM}$r%9%?%C%/%^%7%s$G$d$m$&!$$C$FOC$G$9$h$M!K$N$G!$$Ie(B
e$B$J$?$+!$$$$$0F$,$"$C$?$i!$$I$&$+65$($F$/$@$5$$!%e(B

e$B!!JQ?t$Ne(B swap
e$B$,!$$@$$$?$$:GE,$J7A$G$G$-$F$*5$$KF~$j$@$C$?$s$G$9$,!%e(B
e$B$7$/$7$/!JK\Ev$NK\Ev$K:GE,$J$N$O!$%3%s%Q%$%k;~E@$GJQ?t$N3d$j?6$j$rJQe(B
e$B$($k!K!%e(B

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

SASADA Koichi wrote:

  1. e$B1&JU$,=EJ#$7$J$$%m!<%+%kJQ?t$NNs$@$C$?$i:#$^$GDL$je(B
    e$B!!!JI{:nMQ$O$J$$$N$GLdBj$J$$!Ke(B

e$B!!$(!<$H!$$b$A$m$s:8JU$N4V0c$$$G$9!%e(B

e$B!!$3$N%A%’%C%/$@$1$@$C$?$i!$$=$s$J$KBgJQ$G$O$J$5$=$&$J$N$G!$Bg>fIW$@e(B
e$B$H;W$$$^$9!d$^$D$b$H$5$se(B

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

In message “Re: [ruby-dev:31578] Re: a, a = 1, 2”
on Wed, 22 Aug 2007 00:29:57 +0900, SASADA Koichi [email protected]
writes:

|Yukihiro M. wrote:
|> e$B$H!"$O$C$-$jCG8@$7$F$$$k$H$3$m$G$?$$$X$s8@$$$K$/$$$N$G$9$,!“e(B
|> e$B$3$3$O@'HsBP1~$7$F$b$i$$$?$$$G$9!#e(B
|
|e$B!!$&$&!$$o$+$j$^$7$?!%$?$@!$$I$&$K$b8zN($N$$$$0F$,;W$$$D$+$J$$!J$3$le(B
|e$B$Oe(BFIFOe$B$J%G!<%?=hM}$r%9%?%C%/%^%7%s$G$d$m$&!$$C$FOC$G$9$h$M!K$N$G!$$Ie(B
|e$B$J$?$+!$$$$$0F$,$”$C$?$i!$$I$&$+65$($F$/$@$5$$!%e(B

e$BK\Ev$K$4$a$s$J$5$$!#=EJ#$HI{:nMQ$,$J$$>l9g$K$O:#$^$GDL$j$H$+!"e(B
e$B$h$j%3%s%Q%$%i$KIiC4$r$+$1$k<jCJ$7$+;W$$$D$-$^$;$s$G$9!#e(B

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

In message “Re: [ruby-dev:31621] Re: a, a = 1, 2”
on Thu, 23 Aug 2007 16:15:43 +0900, SASADA Koichi [email protected]
writes:

|Yukihiro M. wrote:
|> e$BK\Ev$K$4$a$s$J$5$$!#=EJ#$HI{:nMQ$,$J$$>l9g$K$O:#$^$GDL$j$H$+!“e(B
|> e$B$h$j%3%s%Q%$%i$KIiC4$r$+$1$k<jCJ$7$+;W$$$D$-$^$;$s$G$9!#e(B
|
|e$B!!$H$j$”$($:!$I>2A=g$r@5$7$/$7$^$7$?!%e(Bx, y = y, x e$B$,e(B 5e$BG$/$i$$CY$/$Je(B
|e$B$j$^$7$?!%e(B

e$B$“$l!#=EJ#$7$J$$;~$K$O$=$N$^$^$H$$$&$3$H$@$H;W$C$?$s$G$9$1$I!#e(B
e$B$3$l$,!V$H$j$”$($:!W$H$$$&$3$H!)e(B

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

Yukihiro M. wrote:

|Yukihiro M. wrote:
|> e$BK\Ev$K$4$a$s$J$5$$!#=EJ#$HI{:nMQ$,$J$$>l9g$K$O:#$^$GDL$j$H$+!“e(B
|> e$B$h$j%3%s%Q%$%i$KIiC4$r$+$1$k<jCJ$7$+;W$$$D$-$^$;$s$G$9!#e(B
|
|e$B!!$H$j$”$($:!$I>2A=g$r@5$7$/$7$^$7$?!%e(Bx, y = y, x e$B$,e(B 5e$BG$/$i$$CY$/$Je(B
|e$B$j$^$7$?!%e(B

e$B$"$l!#=EJ#$7$J$$;~$K$O$=$N$^$^$H$$$&$3$H$@$H;W$C$?$s$G$9$1$I!#e(B
e$B$3$l$,!V$H$j$"$($:!W$H$$$&$3$H!)e(B

e$B!!$=$N$"$H$N%3%_%C%H$G!$%A%’%C%/$$h$S=gHV$rJQ$($k:GE,2=%3!<%I$rF~$le(B
e$B$^$7$?!%=gHV$,$I$&$G$b$$$$C1=c$JNc$G$O0JA0$HF1$8$h$&$K%3%s%Q%$%k$5$le(B
e$B$^$9!%!VC1=c$JNc!W$N6qBNE
$JDj5A$O$a$s$I$$$N$G>JN,!%e(B

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

Yukihiro M. wrote:

e$BK\Ev$K$4$a$s$J$5$$!#=EJ#$HI{:nMQ$,$J$$>l9g$K$O:#$^$GDL$j$H$+!"e(B
e$B$h$j%3%s%Q%$%i$KIiC4$r$+$1$k<jCJ$7$+;W$$$D$-$^$;$s$G$9!#e(B

e$B!!$H$j$"$($:!$I>2A=g$r@5$7$/$7$^$7$?!%e(Bx, y = y, x e$B$,e(B
5e$BG$/$i$$CY$/$Je(B
e$B$j$^$7$?!%e(B