Hi, I have a question about Ruby if constructs. Why aren't they like 
smalltalk if's, where you have a boolean class and two subclasses: true 
and false. They both have these methods: ifTrue and ifFalse. If you use 
a block with a ifTrue on a True object, it will be yielded. If you use 
it on a false object, nothing will happen.

So in ruby code:

true.if_true do
#code will be executed
end

and:
false.if_true do
#code will NOT be executed
end

and if_false is available too.

so you can do this too:

(var == 'a').if_true do
puts 'var = "a"'
end

I know it would be difficult to do an if-else thing with this because 
the return value from the block would be the receiver:

(var == 'a').if_true do
   puts 'var = "a"'
end.if_false do
   #code
end

So is this the reason for if(var == 'a') not being syntactic sugar for 
(var == 'a').if_true?

Thanks for answering!

Jules

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