From: Tanaka Akira <akr@...17n.org>
Date: 2002-07-22T02:42:10+09:00
Subject: [ruby-dev:17758] Re: self in block

In article <200207211617.g6LGHMn5000311@smtp16.dti.ne.jp>,
  Takaaki Tateishi <ttate@kt.jaist.ac.jp> writes:

> $B$H$+$7$^$9$M!%$=$&$$$&%a%=%C%I$r;}$D$Y$-$H$$$&>l9g$,B?$$$H;W$$(B
> $B$^$9(B(sort$B$N>l9g$O$[$H$s$I$=$&$@$H;W$$$^$9(B)$B$,!$>C6KE*$KDj5A$7$F(B
> $B$+$i;H$&$H$$$&>l9g$b$"$k$+$H;W$$$^$9!%$J$N$G!$(Bscheme$B$K$7$mB>$N(B
> $B4X?t7?8@8l$H$+$K$7$m!$$^$:8+$+$1$J$$$@$1$G<B$O;H$$$?$$>lLL$O$"(B
> $B$k$s$8$c$J$$$+$H!%(B

Y lambda {|f| lambda {|arg| ...}}

$B$H$$$&$N$O(B(f $B$N%9%3!<%W$r=|$$$F(B)

f = lambda {|arg| ...}

$B$HEy2A$J$N$G!"!V<B$O;H$$$?$$>lLL$O$"$k!W$H$$$&$N$O?.$8$i$l$^$;$s!#(B
Y $B$r;H$&MxE@$H$$$&$N$O$I$3$K$"$k$s$G$7$g$&$+(B?

$B$J$*!"0lHL$NL5L>4X?t$NMxE@$N$R$H$D$G$"$k!VL>A0$r$D$1$J$/$F$bNI$$!W$H$$(B
$B$&MxE@$O(B Y $B$r;H$&$H$J$/$J$j$^$9!#(BY $B$r;H$&>l9g$O:F5"4X?t$KL>A0$r$D$1$J(B
$B$$$H$$$1$J$/$F!">e$NNc$G$O$I$A$i$b(B f $B$H$$$&L>A0$r(B($B2>0z?t$H$7$F(B)$B$D$1$F(B
$B$$$^$9!#K\Ev$KA4ItL5L>$N$^$^$G$d$j$?$1$l$PA4It(B SK $B%3%s%S%M!<%?$_$?$$$J(B
$B$N$G=q$1$P$G$-$J$$$3$H$O$J$$$s$G$7$g$&$,!#(B

# FP $B$C$F:F5"$O$I$&=q$/$s$@$C$1(B?

> $B$5$i$K!$4X?t7?8@8l$H$+$@$H!$(Blet..in...$B$J$I$N9=J8$GJQ?t(B($BFC$K4X?t(B)
> $B$r6I=j2=$7$F;H$C$?$j$9$k$N$G!$FC$K$=$&$$$&<{MW$b$J$$$N$@$H;W$$$^$9!%(B

let $B$G:F5"4X?t$rDj5A$G$-$k$H$$$&$3$H$O(B... Haskell $B$+$J(B?

$B$=$l$O$=$l$H$7$F!"<B:]$N$H$3$m!">e$NNc$N(B
  f = lambda {|arg| ...}
$B$H$$$&$N$O(B
  let compare = \arg -> ... in compare
$B$N$+$o$j$J$o$1$G$9$M!#(B
-- 
[$BEDCf(B $BE/(B][$B$?$J$+(B $B$"$-$i(B][Tanaka Akira]
$B!V$U$($m(B! $B$o$+$a$A$c$s:n@o$G$9$(C"=$B!W(B(Little Worker, $B7KM7@84](B)