# \[Feature #679\] Integer#to\_s(:step=\>3, :sep=\>",") $B$,M\_$7$$(B

**URL:** <https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590>\
**Category:** Development\
**Created:** [October 23, 2008, 9:34am UTC](https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590 "2008-10-23T09:34:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Martin\_DSSS\_rst](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Martin\_DSSS\_rst](https://www.ruby-forum.com/u/Martin_DSSS_rst)\
**Post date:** [October 23, 2008, 9:34am UTC](https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590/1 "2008-10-23T09:34:36Z")

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e$B%A%1%C%He(B #679 e$B$,99?7$5$l$^$7$?!#e(B (by Martin De$(D+de(Brst)

e$B:G=i$NNc$Oe(B “12,345,678” e$B$N$G$O$J$$$G$7$g$&$+!#e(B

e$B$3$l$G$O%$%s%IIw$NI=5-$,IT2DG=$G$O$J$$$G$7$g$&$+e(B (“1,23,45,678”,  
e$B$h$&$9$k$K0lHV1&$K$O;0$D!"$=$N:8$OFs$D$:$De(B)e$B!#e(B

## Integer e$B$@$1$G$O$J$/!"B\>$N?t$O$I$&$G$7$g$&$+!#e(B

[http://redmine.ruby-lang.org/issues/show/679](http://redmine.ruby-lang.org/issues/show/679)

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**Author:** ![Martin\_DSSS\_rst](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Martin\_DSSS\_rst](https://www.ruby-forum.com/u/Martin_DSSS_rst)\
**Post date:** [October 23, 2008, 9:48am UTC](https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590/2 "2008-10-23T09:48:06Z")

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e$BF#2,$G$9!#e(B

> e$B:G=i$NNc$Oe(B “12,345,678” e$B$N$G$O$J$$$G$7$g$&$+!#e(B

e$B$"!#$=$&$G$7$?!#e(B

> e$B$3$l$G$O%$%s%IIw$NI=5-$,IT2DG=$G$O$J$$$G$7$g$&$+e(B (“1,23,45,678”, e$B$h$&$9$k$K0lHV1&$K$O;0$D!"$=$N:8$OFs$D$:$De(B)e$B!#e(B

e$B%$%s%IIw$O9MN8$7$F$$$^$;$s!#e(Bsprintfe$B$b9MN8$7$F$$$^$;$s$7!#e(B

> Integer e$B$@$1$G$O$J$/!"B\>$N?t$O$I$&$G$7$g$&$+!#e(B

e$B@0?t$G$O$3$N5!G=$,$"$l$P$$$$$J$H$O;W$C$?$N$G$9$,!“e(B  
e$BIbF0\>.?tE@?t$OI,MW$,$”$k$N$G$7$g$&$+!#e(B  
e$B$\*$=$i$/6b3[$NI=8=$G$7$+;H$o$J$$$H;W$C$F$$$^$9!#e(B

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**Author:** ![Martin\_DSSS\_rst](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Martin\_DSSS\_rst](https://www.ruby-forum.com/u/Martin_DSSS_rst)\
**Post date:** [October 23, 2008, 2:29pm UTC](https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590/3 "2008-10-23T14:29:25Z")

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e$B@.@%$G$9!#e(B

> e$B:G=i$NNc$Oe(B “12,345,678” e$B$N$G$O$J$$$G$7$g$&$+!#e(B
> 
> e$B$3$l$G$O%$%s%IIw$NI=5-$,IT2DG=$G$O$J$$$G$7$g$&$+e(B  
> (“1,23,45,678”, e$B$h$&$9$k$K0lHV1&$K$O;0$D!"$=$N:8$OFs$D$:$De(B)e$B!#e(B

POSIX C e$B$N;EMM$r??;w$F!“e(B  
12345678.to\_s(:step=\>[3, 2, 0], :sep=\>”,") #=\> “1,23,45,678”  
e$B$H$+e(B  
12345678.to\_s(:step=\>“320”, :sep=\>",") #=\> “1,23,45,678”  
e$B$H$+e(B

e$B$"$H$O!"e(B:step e$B$h$je(B :grouping e$B$G$9$+$M$’!#e(B

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**Author:** ![Martin\_DSSS\_rst](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/e9c0ed/32.png) [@Martin\_DSSS\_rst](https://www.ruby-forum.com/u/Martin_DSSS_rst)\
**Post date:** [October 23, 2008, 10:38am UTC](https://www.ruby-forum.com/t/feature-679-integer-to-s-step-3-sep-b-m-7-b/151590/4 "2008-10-23T10:38:31Z")

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e$B$5$/$G$9!#e(B

stepe$B$O0cOB46$,$“$k$N$G$9$,!”$+$H$$$C$Fe(Bgroup\_widthe$B$G$OD9$$$G$9$M!D!De(B

The symbol for this is called the thousands separator or, more  
generally (see India and China below), digit group separator  
e$B$@$=$&$G$9!#e(B[wikipedia]

2008/10/23 16:45 Fujioka [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid):

> e$B@0?t$G$O$3$N5!G=$,$"$l$P$$$$$J$H$O;W$C$?$N$G$9$,!“e(B  
> e$BIbF0\>.?tE@?t$OI,MW$,$”$k$N$G$7$g$&$+!#e(B  
> e$B$\*$=$i$/6b3[$NI=8=$G$7$+;H$o$J$$$H;W$C$F$$$^$9!#e(B

e$BJd=uDL2\_C10L$r9MN8$9$l$P!"6b3[$NI=5-$K$b\>.?t$O=P$F$-$^$9$M!#e(B