From: gotoken@... (GOTO Kentaro)
Date: 2000-11-09T01:57:26+09:00
Subject: [ruby-list:25850] Re: メソッドの引き数の数を知りたいのですが� .

In message "[ruby-list:25849] $B%a%=%C%I$N0z$-?t$N?t$rCN$j$?$$$N$G$9$,..(B ."
    on 00/11/09, SHIROYAMA Takayuki <psi@fortune.nest.or.jp> writes:
>$B$"$k%/%i%9$N$"$k%a%=%C%I$,$"$C$?$H$7$F!"$=$N%a%=%C%IL>$d(BID$BCM$,(B
>$BJ,$+$C$F$$$k$H$7$F!"$=$N%a%=%C%I$NMW5a$9$k0z$-?t$N?t(B($B8GDj$N?t$+!"(B
>$B$=$l$H$b2DJQD9$+(B)$B$rCN$kJ}K!$O$"$j$^$9$G$7$g$&$+!)(B

arity $B$H$$$&$N$,$"$j$^$9!#(B[ruby-dev:9930]

  obj.method(:foo).arity

e.g.

  10.method(:+).arity     #=>  1
  [].method(:push).arity  #=> -1

-- $B$4$H$1$s(B