# Proc & block

**URL:** <https://www.ruby-forum.com/t/proc-block/93442>\
**Category:** Development\
**Created:** [April 3, 2006, 11:53am UTC](https://www.ruby-forum.com/t/proc-block/93442 "2006-04-03T11:53:26Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Hidetoshi\_NAGAI](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/49beb7/32.png) [@Hidetoshi\_NAGAI](https://www.ruby-forum.com/u/Hidetoshi_NAGAI)\
**Post date:** [April 3, 2006, 11:53am UTC](https://www.ruby-forum.com/t/proc-block/93442/1 "2006-04-03T11:53:26Z")

</div>

e$B1J0fe(B@e$BCNG=!%6e9)Bg$G$9!%e(B

e$B8=:\_$Ne(B Proc  
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## e$BNc$($Pe(B

## def foo(a,b,c) [a, b, c, block\_given?] end

## e$B$KBP$7$F!$e(B

## x = proc{|m, \*args| [block\_given?, m.call(\*args)] } x.call(method(:foo), 1,2,3){p 111} #=\> [false, [1, 2, 3, false]]

e$B$G$O%V%m%C%/$rM?$($k$3$H$,$G$-$^$;$s!%e(B

## e$B%V%m%C%/$rM?$($k$3$H$,$G$-$k$h$&$K$9$k$?$a$K$Oe(B

## def bar(m, \*args, &blk) [block\_given?, m.call(\*args, &blk)] end x = method(:bar) x.call(method(:foo), 1,2,3){p 111} #=\> [true, [1, 2, 3, true]]

e$B$H$$$&$h$&$K%a%=%C%I$rDj5A$9$kI,MW$,$"$j$^$9!%e(B

## proc e$B%\*%V%8%’%/%H$,e(B block e$B0z?t$r\<h$l$k$h$&$K$J$l$P!$e(B

## x = proc{|m, \*args, &blk| [block\_given?, m.call(\*args, &blk)] } x.call(method(:foo), 1,2,3){p 111} #=\> [true, [1, 2, 3, true]]

e$B$H$G$-$F!$M\>7W$J%a%=%C%IDj5A$r$7$J$/$F:Q$`$N$G$9$,!%!%!%e(B

## e$B$?$@$7$=$N\>l9g!$8=\>u$Ne(B

def baz  
proc{|\*args| [block\_given?, \*args]}  
end

baz.call(1,2,3) #=\> [false, 1, 2, 3]  
baz{p 111}.call(1,2,3) #=\> [true, 1, 2, 3]

---

<div class="post-metadata">

**Author:** ![Hidetoshi\_NAGAI](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/49beb7/32.png) [@Hidetoshi\_NAGAI](https://www.ruby-forum.com/u/Hidetoshi_NAGAI)\
**Post date:** [April 3, 2006, 12:02pm UTC](https://www.ruby-forum.com/t/proc-block/93442/2 "2006-04-03T12:02:50Z")

</div>

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

Hidetoshi NAGAI wrote:

> e$B1J0fe(B@e$BCNG=!%6e9)Bg$G$9!%e(B
> 
> e$B8=:\_$Ne(B Proc e$B%\*%V%8%’%/%H$O%V%m%C%/$r\<u$1\<h$k$3$H$,$G$-$^$;$s$,!$e(B

1.9e$B$G$O$G$-$^$9$h!#e(B  
1.8e$B$KF3F~$9$k$K$O$A$g$C$HBg$-$9$.$kJQ99$N$h$&$K;W$$$^$9$,!#e(B

---

<div class="post-metadata">

**Author:** ![Hidetoshi\_NAGAI](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/h/49beb7/32.png) [@Hidetoshi\_NAGAI](https://www.ruby-forum.com/u/Hidetoshi_NAGAI)\
**Post date:** [April 3, 2006, 12:09pm UTC](https://www.ruby-forum.com/t/proc-block/93442/3 "2006-04-03T12:09:02Z")

</div>

e$B1J0fe(B@e$BCNG=!%6e9)Bg$G$9!%e(B

From: “URABE Shyouhei aka. mput” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
Subject: [ruby-dev:28499] Re: proc & block  
Date: Mon, 3 Apr 2006 19:00:15 +0900  
Message-ID: [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)

> > e$B8=:\_$Ne(B Proc e$B%\*%V%8%'%/%H$O%V%m%C%/$r\<u$1\<h$k$3$H$,$G$-$^$;$s$,!$e(B
> 
> 1.9e$B$G$O$G$-$^$9$h!#e(B

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> 1.8e$B$KF3F~$9$k$K$O$A$g$C$HBg$-$9$.$kJQ99$N$h$&$K;W$$$^$9$,!#e(B

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