Rational 1.08

Tadayoshi_F · June 18, 2006, 5:23pm

e$B$U$J$P$G$9!#e(B

Rational(2399550481, 480000000).to_f

e$B$H$9$k$H%(%i!<$K$J$j$^$9!#e(B

RangeError: bignum too big to convert into `long’

Tadayoshi_F · June 19, 2006, 3:28pm

e$B$M$P$?$G$9!#e(B

e$B:F8=$7$^$;$s!#e(B
e$B$A$J$_$K!";d$N4D6-$G$Oe(B
ruby 1.8.4 (2005-12-24) [i386-mswin32]
ruby 1.9.0 (2006-05-13) [i386-bccwin32]
e$B$H$b$K7k2L$Oe(B
4.99906350208333
e$B$G$7$?!#e(B

versione$B>pJs$,$J$$$HEz$($h$&$,$J$$$N$G$O!#e(B

Tadayoshi_F · June 19, 2006, 5:28pm

e$B$U$J$P$G$9!#e(B

e$B$H$/$K4D6-$K0MB8$9$kLdBj$@$H$O;W$($J$+$C$?$N$G!"2?$b=q$-$^$;$s$G$7$?!#e(B

ruby 1.8.4 (2005-12-24) [i386-freebsd5.4]
r.rb:2:in to_f': bignum too big to convert intolong’ (RangeError)
from r.rb:2

ruby 1.9.0 (2006-06-17) [i386-freebsd5.4]
r.rb:2:in Rational#to_f': bignum too big to convert intolong’
(RangeError)
from r.rb:2

ruby 1.8.4 (2005-12-24) [i686-linux]
r.rb:2:in to_f': bignum too big to convert intolong’ (RangeError)
from r.rb:2

ruby 1.8.4 (2005-12-24) [i386-solaris2.10]
r.rb:2:in to_f': bignum too big to convert intolong’ (RangeError)
from r.rb:2

e$B>e5-$K2C$($F!"e(Bcygwin
e$B$G$bF1$8$G$7$?!#$3$l$G$h$m$7$$$G$7$g$&$+e(B?

Tadayoshi_F · June 20, 2006, 12:48am

e$B$U$J$P$G$9!#e(B

ruby 1.8.4 (2005-12-24) [i386-mswin32]
ruby 1.9.0 (2006-05-13) [i386-bccwin32]

e$B$3$N4D6-$G$Ne(B

require ‘rational’

fn = 0
p [fn.size, fn.class]
bn = (2**(fn.size*8)-1)
p [bn.size, bn.class]
r = bn.to_r
p r
f = r.to_f
p f

e$B$N<B9T7k2L$r8+$;$F$b$i$($^$9$+e(B?

Tadayoshi_F · June 20, 2006, 12:14am

e$B86$G$9!#e(B

e$B$U$J$P$G$9!#e(B

e$B$H$/$K4D6-$K0MB8$9$kLdBj$@$H$O;W$($J$+$C$?$N$G!"2?$b=q$-$^$;$s$G$7$?!#e(B

e$B$"$"$%!#$9$$$^$;$s!"$3$A$i$G$b5/$3$j$^$7$?!#e(B
e$B:#F|Cf$KBP=h$7$^$9!#e(B

Tadayoshi_F · June 20, 2006, 5:16pm

e$B86$G$9!#e(B

e$B$U$J$P$G$9!#e(B

Rational(2399550481, 480000000).to_f

e$B$H$9$k$H%(%i!<$K$J$j$^$9!#e(B

RangeError: bignum too big to convert into `long’

e$B$U$J$P$5$s!“$$$D$b$”$j$,$H$&$4$6$$$^$9!#e(B

Integer#ilog2 e$B$Ne(B Fixnum e$B$He(B Bignum
e$B$N@Z$jBX$o$j$G$N%P%0$G$7$?!#e(B
e$B?7$7$$$N$r;n$7$F$$$?$@$1$^$9$+!)e(B

http://blade.nagaokaut.ac.jp/~sinara/ruby/rational/

1.09 e$B$G$9!#e(B

[ruby-dev:28661] e$B$GEDCf$5$s$K;XE&$5$l$?!Ve(BRObjecte$B$KKd$a9~$`!We(B
e$B$H$$$&OC$b$$$:$l<h$jF~$l$k$D$b$j$G$9!#e(B

Tadayoshi_F · June 22, 2006, 6:11pm

e$B$M$P$?$G$9!#CY$l$F$9$_$^$;$s!#e(B
e$B<+J,08$F$@$H5$IU$/$N$,!"CY$+$C$?!#!#!#e(B

ruby 1.8.4 (2005-12-24) [i386-mswin32]

irb(main):001:0>
irb(main):002:0* require ‘rational’
=> true
irb(main):003:0>
irb(main):004:0* fn = 0
=> 0
irb(main):005:0> p [fn.size, fn.class]
[4, Fixnum]
=> nil
irb(main):006:0> bn = (2**(fn.size*8)-1)
=> 4294967295
irb(main):007:0> p [bn.size, bn.class]
[4, Bignum]
=> nil
irb(main):008:0> r = bn.to_r
=> Rational(4294967295, 1)
irb(main):009:0> p r
Rational(4294967295, 1)
=> nil
irb(main):010:0> f = r.to_f
=> 4294967295.0
irb(main):011:0> p f
4294967295.0
=> nil
irb(main):012:0>

ruby 1.9.0 (2006-05-26) [i386-bccwin32]

C:\ruby19_060526\usr\bin>irb -Ks
irb(main):001:0>
irb(main):002:0* require ‘rational’
=> true
irb(main):003:0>
irb(main):004:0* fn = 0
=> 0
irb(main):005:0> p [fn.size, fn.class]
[4, Fixnum]
=> nil
irb(main):006:0> bn = (2**(fn.size*8)-1)
=> 4294967295
irb(main):007:0> p [bn.size, bn.class]
[4, Bignum]
=> nil
irb(main):008:0> r = bn.to_r
=> Rational(4294967295, 1)
irb(main):009:0> p r
Rational(4294967295, 1)
=> nil
irb(main):010:0> f = r.to_f
=> 4294967295.0
irb(main):011:0> p f
4294967295.0
=> nil
irb(main):012:0>

ruby 1.9.0 (2006-05-13) [i386-bccwin32]e$B!!$O!"e(B
e$B@0M}$7$F$I$C$+$K9T$C$F$7$^$$$^$7$?!#e(B

Tadayoshi_F · June 23, 2006, 2:49pm

e$B$U$J$P$G$9!#e(B

e$B:F8=$5$l$J$$$N$OEvA3$G!"$M$P$?$5$s$O!"86$5$s$Ne(B rational
e$B$r$D$+$C$F$$$Je(B
e$B$$$+$i$G$9!#$3$N7k2L$r$_$?$H$3$m$G$O!"e(Brational 1.08
e$B$r$D$+$C$F$$$l$P!“e(B
e$B%(%i!<$K$J$C$F$$$?$N$G$O!”$H;W$$$^$9!#e(B

Tadayoshi_F · June 20, 2006, 5:34pm

In article 6.2.3.4.2.20060621000724.05758a80@localhost,
Shin-ichiro HARA [email protected] writes:

[ruby-dev:28661] e$B$GEDCf$5$s$K;XE&$5$l$?!Ve(BRObjecte$B$KKd$a9~$`!We(B
e$B$H$$$&OC$b$$$:$l<h$jF~$l$k$D$b$j$G$9!#e(B

e$B$=$&$$$($P!"e(BBignum e$B$b2DG=$JHO0O$Ge(B RObject
e$B$KKd$a9~$`$Y$-$G$9e(B
e$B$h$M!#$=$&$9$l$P!“J,;RJ,Jl$,e(B 231 e$B$h$j$OBg$-$$$,e(B 296
e$B$/$ie(B
e$B$$$h$j$O>.$5$$$H$$$&$”$?$j$G%a%b%j$N@aLs$K$J$k$O$:$G$9!#e(B

e$B$b$A$m$s$3$l$Oe(B rational e$B$H$OFHN)$7$?OC$G$"$C$F!“86$5$s$,$I$&e(B
e$B$3$&$H$$$&$3$H$G$O$J$/!”$=$N$&$A5$$,8~$$$?$i;d$,$d$C$F$_$h$&e(B
e$B$+$H$$$&OC$J$s$G$9$,!#$^$!$$$D$+!#$b$A$m$sB>$N?M$,$d$C$F$b9=e(B
e$B$$$^$;$s$1$I!#e(B

Tadayoshi_F · June 23, 2006, 5:38pm

e$B$U$J$P$G$9!#e(B

Integer#ilog2 e$B$Ne(B Fixnum e$B$He(B Bignum e$B$N@Z$jBX$o$j$G$N%P%0$G$7$?!#e(B
e$B?7$7$$$N$r;n$7$F$$$?$@$1$^$9$+!)e(B

e$B$O$$!#D>$C$?$h$&$G$9!#e(B

e$BOC$,$+$o$j$^$9$,!“e(Bmathn
e$B$G$D$+$&$H$-$K!”@0?t$K$J$C$?$j!"$J$i$J$+$C$?$je(B
e$B$9$k$h$&$G$9!#e(B

Rational(1,1) #=> 1
Rational(1) #=> 1/1
1.to_r #=> 1/1
Rational(1,2) + Rational(1,2) #=> 1
Rational(1,2) - Rational(1,2) #=> 0
Rational(1,2) * 2 #=> 1/1
Rational(1,2) / Rational(1,2) #=> 1/1

‘1’.to_r #=> 1/1
‘1.0’.to_r #=> 1
‘1e0’.to_r #=> 1/1
1.rationalize #=> 1/1
1.0.rationalize #=> 1
‘1.0’.rationalize #=> 1
‘1e0’.rationalize #=> 1

e$B@PDM$5$s$N$O!"$3$s$J46$8!#e(B

Rational(1,1) #=> 1
Rational(1) #=> 1
1.to_r #=> 1
Rational(1,2) + Rational(1,2) #=> 1
Rational(1,2) - Rational(1,2) #=> 0
Rational(1,2) * 2 #=> 1
Rational(1,2) / Rational(1,2) #=> 1

Tadayoshi_F · June 27, 2006, 11:26am

e$B86$G$9!#e(B

e$B$U$J$P$G$9!#e(B

e$BOC$,$+$o$j$^$9$,!“e(Bmathn e$B$G$D$+$&$H$-$K!”@0?t$K$J$C$?$j!"$J$i$J$+$C$?$je(B
e$B$9$k$h$&$G$9!#e(B

e$BBP:v$,IT==J,$G$7$?!#$b$A$m$sI8=`$Ne(B rational.rb
e$B$H%3%s%Q%A$K$7$^$9!#e(B
e$B!"!"!"$7$^$7$?!#e(B

Tadayoshi_F · June 24, 2006, 4:56pm

e$B$U$J$P$G$9!#e(B

‘.9’.to_r e$B$H$$$C$?$b$N$,%(%i!<$K$J$j$^$9!#e(B

e$B4pK\E*$Ke(B String#to_X
e$B$O=q<0$K$D$$$F%(%i!<Js9p$7$J$$$b$N$@$H;W$&$N$G$9e(B
e$B$,!“e(BString#to_r
e$B$O$I$s$I$s%(%i!<$K$7$^$9!#$3$N$”$?$j$O?6Iq$$$r0lCW$5$;e(B
e$B$k$Y$-$@$H;W$&$N$G$9$,!"$I$&$G$7$g$&!#e(B

e$B$?$@!“D4$Y$F$_$k$H!”%(%i!<$K$O$J$i$J$$$b$N$N!"e(Bto_f e$B$N>l9ge(B

‘+_9’ e$B$O%@e(B

e$B%a$@$,e(B ‘_+9’ e$B$O$h$$!"$J$I%/%;$,$"$k$h$&$G$9$,!#e(B

‘’.to_i #=> 0
‘’.to_f #=> 0.0
‘’.to_d #=> #BigDecimal:81c1f14,‘0.0’,4(4)
‘’.to_r # ArgumentError *

“+_9”.to_i #=> 9
“+_9”.to_f #=> 0.0 *
“+_9”.to_d #=> #BigDecimal:81c0240,‘0.0’,4(4) *
“+_9”.to_r #=> 9/1

“+9".to_i #=> 9
"+9”.to_f #=> 9.0
“+9".to_d #=> #BigDecimal:81be594,‘0.0’,4(4) *
"+9”.to_r # ArgumentError *

“.9”.to_i #=> 0
“.9”.to_f #=> 0.9
“.9”.to_d #=> #BigDecimal:81bcde8,‘0.9E0’,4(8)
“.9”.to_r # ArgumentError *

“9_.9".to_i #=> 9
"9.9".to_f #=> 9.9
"9.9".to_d #=> #BigDecimal:81c54c0,‘0.9E1’,4(8) *
"9._9”.to_r #=> 99/10

“_.9".to_i #=> 0
".9".to_f #=> 0.0 *
".9".to_d #=> #BigDecimal:81bee68,‘0.0’,4(4) *
"._9”.to_r # ArgumentError *

“+9\t9”.to_i #=> 9
“+9\t9”.to_f #=> 9.0
“+9\t9”.to_d #=> #BigDecimal:81d37c8,‘0.99E2’,4(8) *
“+9\t9”.to_r # ArgumentError *

“9e+_9”.to_i #=> 9
“9e+_9”.to_f #=> 9000000000.0
“9e+_9”.to_d #=> #BigDecimal:80f3ab8,‘0.9E1’,4(8) *
“9e+_9”.to_r # ArgumentError *

nil.to_i #=> 0
nil.to_f #=> 0.0
nil.to_d # NoMethodError
nil.to_r # NoMethodError

Tadayoshi_F · June 27, 2006, 2:40pm

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:28830] Re: rational 1.08”
on Sat, 24 Jun 2006 23:53:30 +0900, Tadayoshi F.
[email protected] writes:

|# e$B$?$@!“D4$Y$F$_$k$H!”%(%i!<$K$O$J$i$J$$$b$N$N!“e(Bto_f e$B$N>l9ge(B ‘+9’ e$B$O%@e(B
|# e$B%a$@$,e(B '+9’ e$B$O$h$$!”$J$I%/%;$,$"$k$h$&$G$9$,!#e(B

e$BBP=h$7$^$9!#e(B

Tadayoshi_F · June 27, 2006, 11:38am

e$B86$G$9!#e(B

e$B$U$J$P$G$9!#e(B

‘.9’.to_r e$B$H$$$C$?$b$N$,%(%i!<$K$J$j$^$9!#e(B

e$B4pK\E*$Ke(B String#to_X e$B$O=q<0$K$D$$$F%(%i!<Js9p$7$J$$$b$N$@$H;W$&$N$G$9e(B
e$B$,!“e(BString#to_r e$B$O$I$s$I$s%(%i!<$K$7$^$9!#$3$N$”$?$j$O?6Iq$$$r0lCW$5$;e(B
e$B$k$Y$-$@$H;W$&$N$G$9$,!"$I$&$G$7$g$&!#e(B

e$B$$C$7$c$k$H$$j$G$9$M!#$=$N$h$&$K$7$^$7$?!#e(B

rational-1.10 e$B$G$9!#e(B

String#to_r e$B$K$O$^$@LB$$$,$"$j$^$9e(B(“3.14/2”.to_r
e$B$r$I$&$7$h$&$H$+!K!#e(B

e$B$=$l$K@0?tItJ,$d>.?tItJ,$rFI$`e(Bparsere$B$Oe(Bruby
e$BK\BN$N$r;H$$$?$$$N$Ge(B
e$B$9$,!":#$N=j$=$N$h$&$K$O$J$C$F$J$$$N$G!"$I$&$7$h$&$+$H;W$C$F$$e(B
e$B$^$9!#e(B

e$B$?$@!“D4$Y$F$_$k$H!”%(%i!<$K$O$J$i$J$$$b$N$N!"e(Bto_f e$B$N>l9ge(B ‘+_9’ e$B$O%@e(B

e$B%a$@$,e(B ‘_+9’ e$B$O$h$$!"$J$I%/%;$,$"$k$h$&$G$9$,!#e(B

e$B$&$&$`!#e(B

Tadayoshi_F · June 27, 2006, 6:15pm

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:28868] Re: rational 1.08”
on Tue, 27 Jun 2006 21:38:03 +0900, Yukihiro M.
[email protected] writes:

|In message “Re: [ruby-dev:28830] Re: rational 1.08”
| on Sat, 24 Jun 2006 23:53:30 +0900, Tadayoshi F. [email protected] writes:
|
||# e$B$?$@!“D4$Y$F$_$k$H!”%(%i!<$K$O$J$i$J$$$b$N$N!“e(Bto_f e$B$N>l9ge(B ‘+9’ e$B$O%@e(B
||# e$B%a$@$,e(B '+9’ e$B$O$h$$!”$J$I%/%;$,$"$k$h$&$G$9$,!#e(B
|
|e$BBP=h$7$^$9!#e(B

to_ie$B$He(Bto_fe$B$G!V@hF,$Ne(B _
e$B$rL5;k$9$k!W$H$$$&5sF0$K$J$C$F$$$^$7e(B
e$B$?!#$7$+$7!"e(BRubye$B$N?t$OESCf$NG$0U$N>l=j$Ke(B _
e$B$rF~$l$i$l$^$9$,!“e(B
e$B@hF,$K$OF~$j$^$;$s$+$i!”$3$l$O@5$7$/$J$$5sF0$@$H;W$$$^$9!#e(B
e$B$h$C$F!“e(B(e$B$H$j$”$($:e(B1.9e$B$Ge(B)e$B=$@5$7$^$9!#JQ998e$N7k2L$O0J2<$NDLe(B
e$B$j$G$9!#e(B

‘’.to_i #=> 0
‘’.to_f #=> 0.0

“+_9”.to_i #=> 0 *
“+_9”.to_f #=> 0.0

“+9".to_i #=> 0 *
"+9”.to_f #=> 0.0 *

“.9”.to_i #=> 0
“.9”.to_f #=> 0.9

“9_.9".to_i #=> 9
"9._9”.to_f #=> 9.9

“_.9".to_i #=> 0 *
"._9”.to_f #=> 0.0 *

“+9\t9”.to_i #=> 9
“+9\t9”.to_f #=> 9.0

“9e+_9”.to_i #=> 9
“9e+_9”.to_f #=> 9000000000.0

BigDecimale$B$de(BRationale$B$K$D$$$F$O$3$l$K=`$:$k$Y$-$@$H;W$$$^$9!#e(B

Tadayoshi_F · June 28, 2006, 7:11am

e$B>.NS$G$9!#e(B

----- Original Message -----
From: “Yukihiro M.” [email protected]
Subject: [ruby-dev:28872] Re: rational 1.08

e$B$J$+$J$+<j$,2s$i$J$$$N$,8=>u$G$9$,!%!%!%e(B

to_ie$B$He(Bto_fe$B$G!V@hF,$Ne(B _ e$B$rL5;k$9$k!W$H$$$&5sF0$K$J$C$F$$$^$7e(B
e$B$?!#$7$+$7!"e(BRubye$B$N?t$OESCf$NG$0U$N>l=j$Ke(B _ e$B$rF~$l$i$l$^$9$,!“e(B
e$B@hF,$K$OF~$j$^$;$s$+$i!”$3$l$O@5$7$/$J$$5sF0$@$H;W$$$^$9!#e(B
e$B$h$C$F!“e(B(e$B$H$j$”$($:e(B1.9e$B$Ge(B)e$B=$@5$7$^$9!#JQ998e$N7k2L$O0J2<$NDLe(B
e$B$j$G$9!#e(B
…

“+_9”.to_i #=> 0 *
“+_9”.to_f #=> 0.0
‘+’ or ‘-’ e$B$N8e$m$O!V@hF,!W$J$N$G$7$g$&$+!)e(B

BigDecimale$B$de(BRationale$B$K$D$$$F$O$3$l$K=$:$k$Y$-$@$H;W$$$^$9!#e(B e$BN;2r$G$9$,!"e(B e$B!!#1!%J8;zNs$N@hF,$K$"$k%9%Z!<%9!Je(B' ',\t,\b,\n e$BEy$b4^$!K$O!)e(B
e$B!!#2!%e(B"1E3".to_i ==> 1 e$B!Je(B1.8.4e$B!K$+e(B 1000 e$B!)e(B
e$B!!#3!%IbF0>.?t%G!<%?$r<h$j9~$`>l9ge(B “1.3D-4”
e$BEy$N%G!<%?I=8=$OB?$$!#e(B
“1.3D-4"e$B$be(B"1.3E-4"e$BF1MM$KIbF0>.?t$H$7$FG’<1$7$F$[$7$$$G$9!#e(B
e$B!!#4!%:#2s$O%9%Z!<%9!J$H?t;z0J30$NJ8;z!K!”$=$l$Ke(B ‘_’
e$B$N<h$j07$$$N:90[e(B
e$B!!!$,LdBj!#$3$l$i$r8D!9$K=hM}$9$k$N$OF1MM$JLdBj$r:#8e$b0z$-5/e(B
e$B!!!$3$9$N$G$OL5$$$G$7$g$&$+!JBg$-$JLdBj$H$O;W$$$^$;$s$,!D!K!)e(B
e$B!!!$G$-$l$Pe(B rb_normalize_numeric_string(numericlike_string)
e$B$N$h$&$Je(B
e$B!!!4X?t$G$^$H$a$i$l$J$$$G$7$g$&$+!)e(B
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e$B???tCMI=8=$,F@$i$l$k!#!Ke(B

e$B:G8e$K!“2?J,e(B C e$B$de(B FORTRAN e$B0J30$NCN<1$,K3$7$/!”?tCMCf$Ne(B
'’ e$B$rFCJLe(B
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‘_’ e$B$rFCJL$K07$&%a%j%C%H$r65$($FD:$1$l$P$”$j$,$?$$$G$9!#e(B

e$B0J>e$G$9!#e(B

e$B>.NSe(B e$BLPM:e(B

Tadayoshi_F · June 28, 2006, 10:54am

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:28885] Re: rational 1.08”
on Wed, 28 Jun 2006 14:09:58 +0900, “Shigeo Kobayashi”
[email protected] writes:

|> “+_9”.to_i #=> 0 *
|> “+_9”.to_f #=> 0.0
|‘+’ or ‘-’ e$B$N8e$m$O!V@hF,!W$J$N$G$7$g$&$+!)e(B

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|> BigDecimale$B$de(BRationale$B$K$D$$$F$O$3$l$K=$:$k$Y$-$@$H;W$$$^$9!#e(B |e$BN;2r$G$9$,!"e(B |e$B!!#1!%J8;zNs$N@hF,$K$"$k%9%Z!<%9!Je(B' ',\t,\b,\n e$BEy$b4^$!K$O!)e(B

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|e$B!!#2!%e(B"1E3".to_i ==> 1 e$B!Je(B1.8.4e$B!K$+e(B 1000 e$B!)e(B

1e$B$G$9!#e(Bto_ie$B$O;X?tI=5-$r2r<a$7$^$;$s!#e(B

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| "1.3D-4"e$B$be(B"1.3E-4"e$BF1MM$KIbF0>.?t$H$7$FG’<1$7$F$[$7$$$G$9!#e(B

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                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

Tadayoshi_F · June 28, 2006, 3:59pm

e$B>.NS$G$9!#e(B

----- Original Message -----
From: “Yukihiro M.” [email protected]
Subject: [ruby-dev:28887] Re: rational 1.08

|‘+’ or ‘-’ e$B$N8e$m$O!V@hF,!W$J$N$G$7$g$&$+!)e(B

e$B$O$$!#?t;z$N4V$Ke(B _ e$B$r5v$9$H2r<a$7$F$/$@$5$$!#e(B
“._02”.to_f => 0.0 e$B$bF1MM$G$9$M!#e(B

|e$B!!#3!%IbF0>.?t%G!<%?$r<h$j9~$`>l9ge(B “1.3D-4” e$BEy$N%G!<%?I=8=$OB?$$!#e(B
| "1.3D-4"e$B$be(B"1.3E-4"e$BF1MM$KIbF0>.?t$H$7$FG’<1$7$F$[$7$$$G$9!#e(B

e$B$=$&$J$s$G$9$+!#e(Bee$B$Oe(Bexponentiale$B$@$HJ9$$$F$$$^$9$,!“$3$N>l9g$Ne(B
d/De$B$O$I$&$$$&0UL#$J$s$G$7$g$&$+!#e(B
e$B:#99e(BFORTRANe$B$bL5$$$h$&$J5$$b$7$^$9$1$I!”@N$N4QB,%G!<%?e(B
e$BEy$K$O7k9=$“$j$^$9!#$3$3$i$X$s$O!”$^$!5$;}$A$NLdBj$G!"%j%Fe(B
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e$B$&$Ke(B _ e$B$r5v$7$F$$$^$9!#$3$l$Oe(BPerle$B$G$bF1MM$G$9!#e(B
e$B$“$”!“$=$&$J$s$G$9$M!De(B
e$B$&!<$s!“2?$+M}M3$,$”$k$N$G$7$g$&$,!”;d$J$ie(B
“1,000”.to_i ==> 1000
e$B$NJ}$,!J>/$7!K$&$l$7$$$G$9!#e(B

e$BBg6Z$GN;2r$$$?$7$^$7$?!#e(B

Tadayoshi_F · June 28, 2006, 12:23pm

e$B86$G$9!#e(B

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

“9_._9”.to_f #=> 9.9

Float(“9_._9”) e$B$O$I$&$7$^$9!)8=>u$G$ONc30$G$9$,!#e(B

Tadayoshi_F · June 28, 2006, 4:15pm

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:28891] Re: rational 1.08”
on Wed, 28 Jun 2006 19:20:59 +0900, Shin-ichiro HARA
[email protected] writes:

|>“9_.9".to_f #=> 9.9
|
|Float("9._9”) e$B$O$I$&$7$^$9!)8=>u$G$ONc30$G$9$,!#e(B

e$B$“$”!"$4$a$s$J$5$$!#$3$l$Oe(Bto_ie$B$G$be(Bto_fe$B$G$b%<%m$K$J$k$Y$-$G$9!#e(B
e$B$G!"e(BFloat()e$B$G$ONc30!#e(B