# :FOO === "FOO" =\> true and case/when behavior

**URL:** <https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689>\
**Category:** Development\
**Created:** [November 6, 2008, 1:49pm UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689 "2008-11-06T13:49:07Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 6, 2008, 1:49pm UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/1 "2008-11-06T13:49:07Z")

</div>

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–  
p :FOO === “FOO”

FOO = :FOO

case “FOO”  
when FOO  
puts 1  
else  
puts 0  
end

## case “FOO” when :FOO puts 1 else puts 0 end

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## – emperor2% ruby-dev -v /tmp/g.rb ruby 1.9.0 (2008-11-04 revision 20106) [i686-linux] true 1 0

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:FOO === “FOO” ==\> true

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\_\_  
----------------------------------------------------\>\> e$B@PDMe(B  
e$B7=\<ye(B \<\<—  
----------------------------------\>\> e-mail: removed\_email\_address@domain.invalid \<\<—

---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 6, 2008, 11:00pm UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/2 "2008-11-06T23:00:43Z")

</div>

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In message “Re: [ruby-dev:37026] :FOO === “FOO” =\> true and case/when  
behavior”  
on Thu, 6 Nov 2008 21:46:18 +0900, removed\_email\_address@domain.invalid (Keiju  
ISHITSUKA) writes:

|2e$B$D\<ALd$,$"$C$Fe(B,  
|  
| :FOO === “FOO” ==\> true  
|  
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```
                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)
```

---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 7, 2008, 6:14am UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/3 "2008-11-07T06:14:43Z")

</div>

e$B$1$$$8$e!w$$$7$D$+$G$9e(B.

In [ruby-dev :37030] the message: "[ruby-dev:37030] Re: :FOO ===  
“FOO” =\> true and case/when behavior ", on Nov/07 06:56(JST) Yukihiro  
Matsumoto writes:

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

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> e$B$J$$$G$7$g$&$+!#e(B

e$B7k9=HyL/$J:GE,2=$J$s$G$9$Me(B:

case “FOO”  
when :FOO  
puts 1  
else  
puts 0  
end

BAR = 1

case “FOO”  
when BAR  
puts :BAR  
when :FOO  
puts 1  
else  
puts 0  
end

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\_\_  
----------------------------------------------------\>\> e$B@PDMe(B  
e$B7=\<ye(B \<\<—  
----------------------------------\>\> e-mail: removed\_email\_address@domain.invalid \<\<—

---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 12, 2008, 4:37am UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/4 "2008-11-12T04:37:50Z")

</div>

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

Yukihiro M. e$B$5$s$O=q$-$^$7$?e(B:

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# 

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---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 12, 2008, 9:39am UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/5 "2008-11-12T09:39:11Z")

</div>

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

Urabe S. e$B$5$s$O=q$-$^$7$?e(B:

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---

<div class="post-metadata">

**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [November 12, 2008, 11:34am UTC](https://www.ruby-forum.com/t/foo-foo-true-and-case-when-behavior/152689/6 "2008-11-12T11:34:52Z")

</div>

Yugui (Yuki S.) e$B$5$s$O=q$-$^$7$?e(B:

> > 
> 
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class Hash  
def method\_missing mid, \*a, &b;  
case mid.to\_s.chomp(’=’)  
when \*self.keys then fetch(mid).call(\*a, &b)  
end  
end  
end

{ foo: -\> { p self},  
bar: -\> x, y { x.send y } }.foo

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