Feature #2968: e$B?tCM$N@5Ii$rJV$9%a%=%C%Ie(Bhttp://redmine.ruby-lang.org/issues/show/2968
e$B5/I<<Te(B: Yui NARUSE@hEYe (B: Normal
e$B?tCM$N@5Ii$rJV$9%a%=%C%I$,M_$7$$$G$9!#e (B#e (B#e (B#e (B
e$BG:$_$I$3$m$O$$$D$b$NDL$j%a%=%C%IL>$G$9$,!"e(B
Numeric#positive? e$B$He(B Numeric#negative?
Numeric#sign → e$BIi$Ge(B -1e$B!"@5$Ge(B 1
Numeric#sign? → e$BIi$Ge(B true, e$B@5$Ge(B false (signbit(3)#e (B
e$B$$$+$,$G$7$g$&!#e (B
e$BB<ED$G$9!#e (B
On 2010/03/16, at 3:38, Yui NARUSE wrote:
e$B?tCM$N@5Ii$rJV$9%a%=%C%I$,M_$7$$$G$9!#e (B#e (B#e (B#e (B
e$BG:$_$I$3$m$O$$$D$b$NDL$j%a%=%C%IL>$G$9$,!"e(B
Numeric#positive? e$B$He(B Numeric#negative?
Numeric#sign → e$BIi$Ge(B -1e$B!"@5$Ge(B 1
Numeric#sign? → e$BIi$Ge(B true, e$B@5$Ge(B false (signbit(3) e$B$K=,$&e(B)#e (B
Numeric#sign? e$B$h$j$O!"e(BNumeric#positive? e$B$He(B Numeric#negative?#e (B
Numeric#sign e$B$bF1;~$KDs6!$5$l$F$$$FNI$$$H;W$$$^$9!#e (B
e$B$H$3$m$G!"$3$l$i$N%a%=%C%I$Oe(B Complex
Numeric e$B$GDs6!$9$k%a%=%C%I$O<BIt$K$D$$$F$NId9f$r07$$!"e(B#e (B
Numeric e$B$GDs6!$9$k%a%=%C%I$re(B Complex e$B$+$i$Oe(B undef#e (B#e (B#e (B
–
e$BK$r=q$-$^$7$?e(B!!
Amazonで島田 浩二, 設樂 洋爾, 村田 賢太, 前田 智樹, 谷口 文威のRuby 逆引きレシピ すぐに美味しいサンプル&テクニック 232 (PROGRAMMER’S RECIPE)。アマゾンならポイント還元本が多数。島田 浩二, 設樂 洋爾, 村田 賢太, 前田 智樹, 谷口 文威作品ほか、お急ぎ便対象商品は当日お届けも可能。またRuby 逆引きレシピ すぐに美味しいサンプル&テクニック 232 (PROGRAMMER’S RECIPE)もアマゾン配送商品なら通常配送無料。
E-mail: [email protected] http://twitter.com/mrkn/ ドレッシングのような
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Shyouhei U.)
e$B%9%F!<%?%9e(B Opene$B$+$ie(BRejectede$B$KJQ99e(B
f > 0 or 1.0 / f > 0
http://redmine.ruby-lang.org/issues/show/2968
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Yui NARUSE)
e$B<B?t$N$_$NA[Dj$G$7$?$N$G!"e(BNumerice$B$G$O$J$/!"e(BInteger, Float,#e (B
f > 0 or 1.0 / f > 0 e$B$G$O$J$s$G$@$a$J$s$G$9$+e(B?#e (B#e (B
http://redmine.ruby-lang.org/issues/show/2968
e$B$`$i$?$G$9!#e (B
On 2010/03/16, at 8:04, Shyouhei U. wrote:
f > 0 or 1.0 / f > 0
e$B$G$O$J$s$G$@$a$J$s$G$9$+e(B?
e$BA0<T$G$Oe(B -0.0 e$B$NId9f$rD4$Y$i$l$^$;$s!#e (B#e (B
e$B$b$&0lE@5$$K$J$k$3$H$O!“e(B1.0 / -0.0 e$B$Ge(B -Infinity#e (B
–
e$BK$r=q$-$^$7$?e(B!!
Amazonで島田 浩二, 設樂 洋爾, 村田 賢太, 前田 智樹, 谷口 文威のRuby 逆引きレシピ すぐに美味しいサンプル&テクニック 232 (PROGRAMMER’S RECIPE)。アマゾンならポイント還元本が多数。島田 浩二, 設樂 洋爾, 村田 賢太, 前田 智樹, 谷口 文威作品ほか、お急ぎ便対象商品は当日お届けも可能。またRuby 逆引きレシピ すぐに美味しいサンプル&テクニック 232 (PROGRAMMER’S RECIPE)もアマゾン配送商品なら通常配送無料。
E-mail: [email protected] http://twitter.com/mrkn/ ドレッシングのような
Yui NARUSE ã•ã‚“ã¯æ›¸ãã¾ã—ãŸ:
(f > 0 or 1.0 / f > 0) ã¨ã„ã†è¶£æ—¨ã‹ã¨æ€ã„ã¾ã™ã€‚
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ã§ã€ãã‚‚ãã‚‚ã®å‹•æ©Ÿã¯ doubleを生æˆã™ã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ã®ãƒ†ã‚¹ãƒˆã‚’ã™ã‚‹éš›ã«ã€
ãã‚Œã¯signãŒæ¬²ã—ã„ã‚“ã˜ã‚ƒãªãã¦==よりもstrictãªç‰å€¤åˆ¤å®šãŒæ¬²ã—ã„ã¨ã„ã†è©±ã§ã¯
1.0/-0.0 㯠VAX ã ã¨ã©ã†ãªã‚“ã§ã—ょã†ã。
æŒã£ã¦ãªã„ã®ã§å˜ã˜ä¸Šã’ã¾ã›ã‚“ãŒã¹ã¤ã«1.0/-0.0ãŒ-Infを生æˆã™ã‚‹å¿…è¦ã¯ãªãã¦ã€-0.0
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Yui NARUSE)
(f > 0 or 1.0 / f > 0) e$B$H$$$&<q;]$+$H;W$$$^$9!#e (B
e$B$G!"$=$b$=$b$NF05!$Oe(B#e (B
#e (B
http://redmine.ruby-lang.org/issues/show/2968
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Yui NARUSE)
e$B$G!"$=$b$=$b$NF05!$Oe(B doublee$B$r@8@.$9$k%a%=%C%I$N%F%9%H$r$9$k:]$K!“e(B#e (B
e$B$=$l$Oe(Bsigne$B$,M_$7$$$s$8$c$J$/$Fe(B==e$B$h$j$be(Bstricte$B$JEyCMH=Dj$,M_$7$$$H$$$&OC$G$Oe(B
e$B$3$NNc$K4X$7$F$O$=$&$G$9$M!#e (B#e (B
#e (B
http://redmine.ruby-lang.org/issues/show/2968
e$B@.@%$G$9!#e (B
2010e$BG/e(B3e$B7ne(B16e$BF|e(B11:37 KOSAKI Motohiro[email protected]
e$B>/$J$=$&$G$9!#e (B
e$BMQES$H$7$F$O$H$j$"$($:%F%9%H%1!<%9$J$N$G$9$,!"GX7J$H$7$F$Oe(B Float#e (B#e (B
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Yui NARUSE)
e$B<B?t$N$_$NA[Dj$G$7$?$N$G!"e(BNumerice$B$G$O$J$/!"e(BInteger, Float, Rational e$B8DJL$KDj5A$7$?J}$,NI$+$C$?$+$b$7$l$^$;$s!#e (B
f > 0 or 1.0 / f > 0 e$B$G$O$J$s$G$@$a$J$s$G$9$+e(B?#e (B#e (B
e$BA[DjMQES$,AH9~$_%/%i%9$N%F%9%H%1!<%9$@$H$9$k$H!"$&$l$7$$?M$O$H$F$be(B#e (B
e$B$7$+$7!"$3$NJ}K!$G$b$^$@!"e(B1e$B%S%C%HFI$a$P$$$$$b$N$rL5BL$KJ#;($K$d$C$F$$$^$;$s$+!#e (B
e$BA[DjMQES$,AH9~$_%/%i%9$N%F%9%H%1!<%9$@$H$9$k$H!"$&$l$7$$?M$O$H$F$be(B#e (B
e$BMQES$H$7$F$O$H$j$"$($:%F%9%H%1!<%9$J$N$G$9$,!"GX7J$H$7$F$Oe(B Float e$B$NIbF0>.?tE@?t$H$7$F$Ne(B#e (B#e (B
e$B#C$G$b$H$l$J$$$G$9$h$Me(B > e$B2>?tIt!";X?tIte(B#e (B
Fortrane$B$de(BCe$B$G?tCM7W;;$9$k$H$-$b!"e(Bif (val < e$BL\I8@:EYe(B)#e (B
e$B$J$N$G!"$=$NGX7J$N$5$i$K%P%C%/%0%i%&%s%I$,$"$k$H;W$&$N$G$9$,!"e(B#e (B
e$B$($0$A!w%(%9%"%s%I%$!<$G$9e(B
2010e$BG/e(B3e$B7ne(B16e$BF|e(B14:03 NARUSE, Yui [email protected]
%a e$BMm$_$N=hM}$r=q$$$F$$$F!“%P%$%J%j$H$7$F$O$9$0$=$3$K$”$k$O$:$N$b$N$,!“e(B#e (B#e (B
packe$B%F%s%W%l!<%HJ8;zNse(B - Rubye$B%j%U%!%l%s%9%^%K%e%"%ke(Bhttp://www.ruby-lang.org/ja/man/html/pack_A5C6A5F3A5D7A5ECA1BCA5C8CAB8BBFACEF3.html #e (B
e$B$H8@$&J}K!$,$"$k$b$N$N!“AH$9~$ %a%=%C%I$K$”$C$F$b0-$/$J$$$H;W$$$^$9!#e (B
e$B$($0$Ae(B
2010e$BG/e(B3e$B7ne(B16e$BF|e(B13:27 KOSAKI Motohiro[email protected]
e$B$7$+$7!“$3$NJ}K!$G$b$^$@!“e(B1e$B%S%C%HFI$a$P$$$$$b$N$rL5BL$KJ#;($K$d$C$F$$$^$;$s$+!#e (B#e (B#e (B
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e$B$J$N$G!“$=$NGX7J$N$5$i$K%P%C%/%0%i%&%s%I$,$”$k$H;W$&$N$G$9$,!"e(B#e (B
%a#e (B#e (B
Fortrane$B$de(BCe$B$G?tCM7W;;$9$k$H$-$b!“e(Bif (val < e$BL\I8@:EYe(B) e$B$_$?$$$J=q$-J}$Ge(B#e (B
IEEE754e$BA0Ds$NDj5A!&<BAu$G$bC/$b:$$i$J$$$H;W$&$N$G!"$"$^$jYf$a$J$$$H;W$&$7e(B
e$B$5$i$K8e$+$i5$$,$D$-$^$7$?$,!“e(BRubye$B$K$be(B Math.frexp()#e (B
2010e$BG/e(B3e$B7ne(B16e$BF|e(B15:16 KOSAKI Motohiro[email protected]
e$B$$$d!“BgJQ$J$N$O3N$+$@$H;W$$$^$9!#e (B
IEEE754e$BA0Ds$NDj5A!&<BAu$G$bC/$b:$$i$J$$$H;W$&$N$G!“$”$^$jYf$a$J$$$H;W$&$7e(B
e$B$5$i$K8e$+$i5$$,$D$-$^$7$?$,!“e(BRubye$B$K$be(B Math.frexp() e$B$,$9$G$K$”$j$^$9$h$M!#e (B
e$B$$ $&!"$=$l$K5$$E$-$^$;$s$G$7$?!#e (B#e (B
e$B$=$l$8$ce(B Math.signbit() e$B$,$"$l$P$$$$$Je(B
e$B#C$G$b$H$l$J$$$G$9$h$Me(B > e$B2>?tIt!";X?tIte(B#e (B
frexp(3) e$B$G$H$l$^$9$M!#e (B
e$BAG$GK:$l$F$$$^$7$?!#$4;XE&$"$j$,$H$&$4$6$$$^$9!#e (B#e (B
e$B7k9=BgJQ$G$9$h$M!#e (B#e (B
IEEE754e$BA0Ds$NDj5A!&<BAu$G$bC/$b:$$i$J$$$H;W$&$N$G!"$"$^$jYf$a$J$$$H;W$&$7e(B
e$B%A%1%C%He(B #2968 e$B$,99?7$5$l$^$7$?!#e (B (by Akinori MUSHA)
e$B%9%F!<%?%9e(B Rejectede$B$+$ie(BAssignede$B$KJQ99e(B
e$B%U%#!<%I%P%C%/$,$"$k$N$Ke(BRejectede$B$N$^$^$J$N$G:F3+$7$^$9!#e (B
e$B!&e(Bpositive? e$B$Oe(B >0 e$B$G$bNI$$$N$GITMWe(B
e$B$H$$$&$H$3$m$+$i!"e(B Numeric#negative?#e (B
#e (B
http://redmine.ruby-lang.org/issues/show/2968