e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B
In message “Re: [ruby-dev:29386] String(nil)”
on Fri, 1 Sep 2006 23:15:01 +0900, Shugo M. [email protected]
writes:
|e$B$^$:!"5DO@$r4JC1$K$9$k$?$a$K!"e(BString(nil)e$B$NOC$He(Bnil.to_se$B$NOC$OJ,$1e(B
|e$B$F9M$($^$;$s$+e(B?
|e$B$3$3$G$O!"e(BString(nil)e$B$K$D$$$F9M$($?$$$H;W$$$^$9!#e(B
e$B$^$:$O4JC1$JJ}$+$i!#e(B
|Yukihiro M. wrote:
|> |> e$B$H$$$&$o$1$G!"e(B
|> |> String(nil) #=> TypeError
|> |> Integer(nil) #=> TypeError
|> |> Float(nl) #=> TypeError
|> |> nil.to_s #=> “”
|> |> nil.to_i #=> 0
|> |> nil.to_f #=> 0.0
|> |e$B;d$b$3$l$,0lHV0l4S@-$,$“$C$F!”$+$DJXMx$@$H;W$$$^$9!#e(B
|e$B!V0l4S@-$,$“$k!W$H$$$&I=8=$O$h$/$J$+$C$?$+$b$7$l$^$;$s!#e(B
|e$B!V0l4S@-$,$”$k$h$&$K8+$($k!W$H$$$&$H$3$m$G$7$g$&$+!#e(B
e$B$^$"!"M}2r$G$-$J$$$o$1$G$O$J$$$G$9!#e(B
|e$B8@8l$r@7W$9$kB&$+$i8+$k$H0l4S@-$,$J$$$h$&$K8+$($k$+$b$7$l$^$;$se(B
|e$B$,!"$=$N8@8l$r;H$C$F%W%m%0%i%`$rFI$=q$-$9$kN)>l$+$i8+$k$H!“$o$je(B
|e$B$H0l4S@-$,$”$k$h$&$K8+$($k$h$&$J5$$,$7$^$9!#e(B
|e$B$?$V$s!“e(Bto_ie$B$,JQ49$,4|BT$5$l$k$+$I$&$+HyL/$J6ILL$G!”$H$j$"$($:JXe(B
|e$BMx$=$&$JCM$KJQ49$7$F$7$^$&$N$KBP$7$F!"e(BIntegere$B$,$=$&$$$&6ILL$G$O%(e(B
|e$B%i!<$r=P$9$N$G!"e(BIntegere$B0J30$NB>$N7?$X$NJQ49$G$bF1MM$N5sF0$r4|BT$7e(B
|e$B$F$7$^$&$N$G$O$J$$$+$H;W$$$^$9!#e(B
Integer()e$B$He(BFloat()e$B$OAPBP$G$9$+$i$=$l$O$=$l$GNI$$$H;W$$$^$9!#e(B
e$B$G!"e(BString()e$B$K$b$=$l$r4|BT$9$k$H$9$k$H!“J8;zNs$K$H$C$F!VJQ49e(B
e$B$,4|BT$5$l$k$+$I$&$+HyL/$J6ILL!W$H$O$I$N$h$&$J6ILL$+$^$:Dj5Ae(B
e$B$9$kI,MW$,$”$k$H;W$$$^$9!#e(B
e$B;d$O!“e(B(nile$B$b4^$a$F$9$Y$F$Ne(BObjecte$B$,e(Bto_se$B$r;}$A!”$J$s$i$+$NJ8;ze(B
e$BNsI=8=$r;}$D$N$Ge(B)e$B!VHyL/$J6ILL!W$OB8:_$7$J$$$H9M$($F$$$^$9!#e(B
e$B$H$$$&$3$H$O!";d$K$H$C$F$Oe(B
String(nil) #=> TypeError
e$B$O!V$“$j$($J$$!W46$8$J$s$G$9$,!”>e5-0F$K;?@.$5$l$?J}!9$O$I$Ne(B
e$B$h$&$K46$8$F$*$i$l$k$N$G$7$g$&$+!#e(B
|e$BJXMx$J$N$O!";H$&;~$K$I$A$i$rA*$V$+$N4p=`$,$o$+$j$d$9$$$H$3$m$@$He(B
|e$B;W$$$^$9!#$J$k$Y$/%(%i!<$K$;$:$K2?$i$+$NCM$KJQ49$7$F$[$7$$;~$Oe(B
|to_ie$B7O$r;H$C$F!"HyL/$J>l9g$O%(%i!<$K$7$F$[$7$$;~$Oe(BInteger()e$B7O$re(B
|e$B;H$($P$$$$$N$G!#e(B
e$B$^$“!”$=$&$G$7$g$&$M!#$G!"e(BString()e$B$K$O!VHyL/$J>l9g$,B8:_$7$Je(B
e$B$$!W$H$$$&$N$,;d$N9M$($G$9!#e(B
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