-
NilClass
-
nil$B$N%/%i%9!%56JQ?t(B($B$NCM(B)nil$B$O(BNilClass$B%/%i%9$NM#0l$N%$%s%9%?%s%9$G$9!%(Bnil$B$O(BFALSE$B%*%V%8%'%/%H$H$H$b$K56$r(B $BI=$7!$$=$NB>$NA4$F$N%*%V%8%'%/%H$O??$G$9!%(B$BCm0U(B: $B$3$N%/%i%9$OFbItE*$KMQ$$$i$l$F$$$k$b(B $B$N$G!$Dj?t(B
Nil$B$ODj5A$5$l$F$$$^$;$s!%(B -
$B%9!<%Q!<%/%i%9(B:
$BA0(B - $B>e(B - $BL\