On Tue, 02 Oct 2007 20:22:01 -0700, Mark Smithfield
<[EMAIL PROTECTED]> wrote:
In the floor method from Number,
truncation _ self truncated.
What does the underscore mean?
:=
In some images it shows up as a left-pointing arrow.
I'm not sure if that's coming back in later iterations or not.
I want to apply smalltalk to fibonacci numbers. I add
this method
to Integer,
fib:
(self = 0) ifTrue: (^0)
(self = 1) ifTrue: (^1)
^ (self - 1 fib) + (self - 2 fib).
Next, I would like to memoize this method, (because of
the enormous performance gains). I do not see how to
memo-ize things in smalltalk. Can somebody help me see the necessary
shift in thinking?
I don't see why memoization would be different in Smalltalk. Or why it
would specifically have to be, rather. You might create a Fibonacci class
that contained an array or somesuch and cached the numbers that had
already been called. (Slowly taking up more and more space over time.)
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