recursive-hashcode ( n obj quot -- code ) - Factor Documentation

recursive-hashcode ( n obj quot -- code )


Vocabulary
math

Inputs
n an integer
obj an object
quot a quotation with stack effect ( n obj -- code )


Outputs
code an integer


Word description
A combinator used to implement methods for the hashcode* generic word. If n is less than or equal to zero, outputs 0, otherwise calls the quotation.

Definition
USING: kernel ;

IN: math

: recursive-hashcode ( n obj quot -- code )
pick 0 <= [ 3drop 0 ] [ [ 1 - ] 2dip call ] if ; inline

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