# Block parameter complete?

**URL:** <https://www.ruby-forum.com/t/block-parameter-complete/107727>\
**Category:** Development\
**Created:** [June 25, 2007, 7:46pm UTC](https://www.ruby-forum.com/t/block-parameter-complete/107727 "2007-06-25T19:46:15Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![SASADA\_Koichi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f1d935/32.png) [@SASADA\_Koichi](https://www.ruby-forum.com/u/SASADA_Koichi)\
**Post date:** [June 25, 2007, 7:46pm UTC](https://www.ruby-forum.com/t/block-parameter-complete/107727/1 "2007-06-25T19:46:15Z")

</div>

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## – ruby -ve “Proc.new{|a| p a}.call(1, 2)” ruby 1.8.5 (2006-08-25) [i486-linux] -e:1: warning: multiple values for a block parameter (2 for 1) from -e:1 [1, 2]

./miniruby -ve “Proc.new{|a| p a}.call(1, 2)”  
ruby 1.9.0 (2007-06-25 patchlevel 0) [i686-linux]  
1

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p :lambda  
f = -\> (m1, m2, o1=:o1, o2=:o2, \*r, p1, p2) {[m1, m2, o1, o2,  
r, p1, p2]}  
(4…10).each{|e|  
p ary = (0…e).to\_a  
p f.call(\*ary)  
puts  
}

p :Proc  
pr = Proc.new{|m1, m2, m3, \*r, p1, p2, p3| [m1, m2, m3, r, p1,  
p2, p3]}  
(0…10).each{|e|  
p ary = (0…e).to\_a  
p ary = pr.call(\*ary)  
puts  
}

#=\>  
:lambda  
[0, 1, 2, 3]  
[0, 1, :o1, :o2, [], 2, 3]

[0, 1, 2, 3, 4]  
[0, 1, 2, :o2, [], 3, 4]

[0, 1, 2, 3, 4, 5]  
[0, 1, 2, 3, [], 4, 5]

[0, 1, 2, 3, 4, 5, 6]  
[0, 1, 2, 3, [4], 5, 6]

[0, 1, 2, 3, 4, 5, 6, 7]  
[0, 1, 2, 3, [4, 5], 6, 7]

[0, 1, 2, 3, 4, 5, 6, 7, 8]  
[0, 1, 2, 3, [4, 5, 6], 7, 8]

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]  
[0, 1, 2, 3, [4, 5, 6, 7], 8, 9]

:Proc  
[]  
[nil, nil, nil, [], nil, nil, nil]

[0]  
[0, nil, nil, [], nil, nil, nil]

[0, 1]  
[0, 1, nil, [], nil, nil, nil]

[0, 1, 2]  
[0, 1, 2, [], nil, nil, nil]

[0, 1, 2, 3]  
[0, 1, 2, [], 3, nil, nil]

[0, 1, 2, 3, 4]  
[0, 1, 2, [], 3, 4, nil]

[0, 1, 2, 3, 4, 5]  
[0, 1, 2, [], 3, 4, 5]

[0, 1, 2, 3, 4, 5, 6]  
[0, 1, 2, [3], 4, 5, 6]

[0, 1, 2, 3, 4, 5, 6, 7]  
[0, 1, 2, [3, 4], 5, 6, 7]

[0, 1, 2, 3, 4, 5, 6, 7, 8]  
[0, 1, 2, [3, 4, 5], 6, 7, 8]

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]  
[0, 1, 2, [3, 4, 5, 6], 7, 8, 9]

---

<div class="post-metadata">

**Author:** ![SASADA\_Koichi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f1d935/32.png) [@SASADA\_Koichi](https://www.ruby-forum.com/u/SASADA_Koichi)\
**Post date:** [September 25, 2007, 11:01pm UTC](https://www.ruby-forum.com/t/block-parameter-complete/107727/2 "2007-09-25T23:01:26Z")

</div>

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Tanaka A. wrote:

> ```
> from -e:2:in `m'
> from -e:3:in `<main>'
> 
> ```
> 
> e$B$H$$$&$3$H$,$\*$3$k$h$&$G$9!#e(B

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e$B!!e(Bm(\*ary, …)  
e$B$H$$$&7A$N8F$S=P$7$KBP1~$G$-$F$$$J$+$C$?$h$&$G$9!#e(B

---

<div class="post-metadata">

**Author:** ![SASADA\_Koichi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f1d935/32.png) [@SASADA\_Koichi](https://www.ruby-forum.com/u/SASADA_Koichi)\
**Post date:** [September 25, 2007, 11:10pm UTC](https://www.ruby-forum.com/t/block-parameter-complete/107727/3 "2007-09-25T23:10:16Z")

</div>

In article [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid),  
SASADA Koichi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

> e$B!&e(Bpost arg e$B$NBP1~e(B

e$B$H$j$"$($:!"e(B

% ./ruby -ve ’  
def m(&b) p b; b.yield(\*[:hahaha], 0) end  
m {|\*x| p x }’  
ruby 1.9.0 (2007-06-26 patchlevel 0) [i686-linux]  
#Proc:0xb7cc42d4@-e:3  
-e:2:in `method_missing': undefined method `yield’ for [:hahaha]:Array  
(NoMethodError)  
from -e:2:in `m' from -e:3:in `’

e$B$H$$$&$3$H$,$\*$3$k$h$&$G$9!#e(B

---

<div class="post-metadata">

**Author:** ![SASADA\_Koichi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/f1d935/32.png) [@SASADA\_Koichi](https://www.ruby-forum.com/u/SASADA_Koichi)\
**Post date:** [September 25, 2007, 11:04pm UTC](https://www.ruby-forum.com/t/block-parameter-complete/107727/4 "2007-09-25T23:04:31Z")

</div>

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In message “Re: [ruby-dev:31047] block parameter complete?”  
on Tue, 26 Jun 2007 00:57:16 +0900, SASADA Koichi [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
writes:

|e$B!&e(Bpost arg e$B$NBP1~e(B  
|  
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|e$B$G$7$g$&$+!#$H$j$“$($:!”:G8e$Ke(B nil e$B$r$D$a$?$H2r\<a$7!"e(Bp1 e$B$XBeF~e(B  
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