method proposition

[Dirk Meijer]

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hi all,
what do you think of these methods:

class TrueClass
def switch
false
end
end

class FalseClass
def switch
true
end
end

i think i could find some real use for this, though switch! would probably
be even more useful..
greetings, Dirk.

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[dblack]

Hi --

hi all,
what do you think of these methods:

class TrueClass
def switch
false
end
end

class FalseClass
def switch
true
end
end

i think i could find some real use for this, though switch! would probably
be even more useful..

You don't like "not"?

What would switch! do?


David

--
David A. Black
(e-mail address removed)

"Ruby for Rails", from Manning Publications, coming April 2006!
http://www.manning.com/books/black

 

[Dirk Meijer]

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hi,

You don't like "not"?

hmm.. guess i missed that ;-)

What would switch! do?

switch! would change self

greetings, Dirk.

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[Dirk Meijer]

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hi again,

foobar=3Dtrue
foobar=3Dnot(foobar)
doesn't seem to work, while i can see purpose in that,

light_switch=3Dfalse
light_switch.switch if dark=3D=3Dtrue

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[Joe Van Dyk]

Hi --



You don't like "not"?

What would switch! do?

True would become False. False would become True... Human sacrifice,
dogs and cats living together - mass hysteria!

 

[dblack]

Hi --

hi,



hmm.. guess i missed that ;-)



switch! would change self

So:

true.switch!
1 == 1 # false

?


David

--
David A. Black
(e-mail address removed)

"Ruby for Rails", from Manning Publications, coming April 2006!
http://www.manning.com/books/black

 

[Joe Van Dyk]

hi,



hmm.. guess i missed that ;-)



switch! would change self

er, the global value 'true' is the only instance of TrueClass. so,
doing true.switch! would make true become false?

So then,
if 1 =3D=3D 1
puts "hi"
end

Wouldn't print anything?

(I wouldn't want to maintain your programs

 

[Dirk Meijer]

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er, the global value 'true' is the only instance of TrueClass. so,
doing true.switch! would make true become false?

So then,
if 1 =3D=3D 1
puts "hi"
end

Wouldn't print anything?

that, on second thought, probably wouldn't work, and the following would
have to be used:

light_switch=3Dfalse
light_switch=3Dlight_switch.switch if dark=3D=3Dtrue

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[Eero Saynatkari]

that, on second thought, probably wouldn't work, and the following would
have to be used:

light_switch=false
light_switch=light_switch.switch if dark==true

I think here is where a Symbol would be most fitting

light_switch = ff
light_switch = n if dark?


E

 

[Paul Robinson]

I think here is where a Symbol would be most fitting

light_switch = ff
light_switch = n if dark?

I'd just like to point out that this now makes it 4 Ruby programmers
needed to change a lightbulb (or at least turn it on) so far in this
thread. Would anybody like to take a guess at how many it would have
taken in other languages?

 

[Simon Kröger]

I think here is where a Symbol would be most fitting

light_switch = ff
light_switch = n if dark?

I don't get it...

light_switch = dark

should be the same as

light_switch=false
light_switch=light_switch.switch if dark==true

right? (and *please* don't compare to 'true' if something is true, it
*is* already true, comparing it with true doesn't change that - never)

also

light_switch = !light_switch

should 'switch' the switch, right?

puzzled, or did i missed the joke?

Simon

 

[dblack]

Hi --

hi again,

foobar=true
foobar=not(foobar)
doesn't seem to work, while i can see purpose in that,

You would do:

x = (not x)

or

x = !x


David

--
David A. Black
(e-mail address removed)

"Ruby for Rails", from Manning Publications, coming April 2006!
http://www.manning.com/books/black