Single Dispatch - language feature

Example from Common Lisp:

; https://eli.thegreenplace.net/2016/a-polyglots-guide-to-multiple-dispatch-part-3/
(defclass Person () ())
(defmethod frobnicate ((p Person) record spreadsheet)
 (format t "~a ~a ~a~&" (type-of p) (type-of record) (type-of spreadsheet)))
(defclass Asteroid () ())
(defmethod frobnicate ((a Asteroid) velocity size)
 ; do stuff
 )
; At runtime these 2 would be routed to respective methods:
(frobnicate a-person his-record big-spreadsheet)
(frobnicate an-asteroid very-fast pretty-small)

Example from Speedie:

|| x = "str"
|| i = x.find("t")

Languages with Single Dispatch include Java, JavaScript, Python, C++, Swift, TypeScript, Objective-C, Elixir, Common Lisp, Cython, Speedie, Pizza, Oracle Java, Deesel, cooC, Real-Time Concurrent C

Languages without Single Dispatch include progsbase

This question asks: Does the method called depended on a single operand?

Read more about Single Dispatch on the web: 1.

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