gethash

From the mnemonics of the naming, a guess is that GetHash has to do with hashing.

It teases out if someone happens to know the GetHash() implementation in C#.

Here's my exact train of thought while reading that: GetHash?

What's the default implementation of GetHash() in c#?

> It teases out if someone happens to know the GetHash() implementation in C#.

I would format the function like this: (defun memoize (fn) (let ((cache (make-hash-table:test #'equal))) (lambda (&rest args) (multiple-value-bind (val win) (gethash args cache) (if win val (setf (gethash args cache) (apply fn args))))))) I'm a Lisp programmer and the C# arglist is already hard to parse with lots of noise - for me.

> (defun f (x y) (let ((z (gethash x:a))) (+ z y)) vs > (defn f [x y] (let [z (get x:a)] (+ x y))) The CL defn of f is a function that is called with two arguments.

I don't know whether GetHash() in C# is as useful a knowledge filter as extend/include in Ruby, doesn't sound like it to me, but I do think that a carefully selected question like that can separate the men from the boys, so to speak.

In Common Lisp: (setf h (make-hash-table)) (setf (gethash 'foo h) "hi");; -> "hi" (gethash 'foo h);; -> "hi" (gethash 'bar h "bye");; -> "bye" That's not too bad.

"What's the default implementation of GetHash() in c#?" As in if you call get hash code on a custom class name {public sting first ="A", public string last = "B"}; what happens and or what's it going to return.

In lisp, I have to do (let ((myhash (make-hash-table:test 'equal))) (setf (gethash "name" myhash) "andrew" (gethash "location" myhash) "sf")) Instead of `#{"name" "andrew" "location" "sf"}`.