Source. (defun mappend (fn &rest lsts) "maps elements in list and finally appends all resulted lists." (apply #'append (apply #'mapcar fn lsts))) Source Context.

nconc with (back)quote'd list constants. Google says: "Avoid nconc!" They recommend to use "mappend" instead, which you could naively define this way (naive because it's O (n^2)!): (defun mappend (fn list "ul") "Append the results of calling fn on each element of list. Like mapcan, but uses append instead of nconc."

Created Sep 21, 2010. Star 0 Fork 0; Star Code Revisions 1. Embed. What would you like to do? Going into chapter two of Paradigms of Artificial Intelligence Programming, we get a deceptively simple program to experiment with. The code for this chapter is located in the file simple.lisp, but note that the file does not include the mappend function from section 1.7. The mappend!

list-1---the first list(which must be a proper list). result-list---a list. This last part is so that all functions in the grammar will return a list of words. That way, we can freely apply append to any category.

; usage: (mappend '(lambda (x) (list x (* x x))) '(1 2 3)) (apply 'append (mapcar fn lst)) ) ;_ end of defun (defun mklist (x) ; If x is a list return it, otherwise return the list of x (if (listp x) x (list x) ) ;_ end of if ) ;_ end of defun (defun flatten (expr) ; Get rid of imbedded lists (to one level only)."

MAPPEN curriculum is designed for teachers working in every public, private and catholic school in Australia. Do Forms do ((var [start [step]])*) (stop result*) form* ⇒ result*. Iterate over a group of statements while a test condition holds. Variables are bound within the iteration and stepped in parallel.

Common Lisp has different namespaces for functions and variables. (defun mappend (fn the-list) (apply #'append (mapcar fn the-list))) Above MAPPEND gets defined with two local variables fn and the-list. APPLY gets passed the function value of APPEND. MAPCAR gets passed the variable value of FN. Similar see this:

That way, we can freely apply append to any category. ( defun one-of (set) "Pick one element of set, and make a list of it." ( list (random-elt set))) ( defun random-elt (choices) "Choose an element from a list at random." (I noticed because it complicated the definition of "mappend" in an earlier post.) Common Lisp APPEND takes 0 or more (&rest). Emacs Lisp append takes 0 or more (&rest). To demonstrate the higher-order-function style of programming, we will define a new function called mappend. It takes two arguments, a function and a list.

The mappend! procedure appends the given mutable lists by mutating the tail of each to refer to the next, using set-mcdr!.Empty lists are dropped; in particular, the result of calling mappend! with one or more empty lists is the same as the result of the call with the empty lists removed from the set of arguments. MAPPEN curriculum is designed for teachers working in every public, private and catholic school in Australia. Do Forms do ((var [start [step]])*) (stop result*) form* ⇒ result*. Iterate over a group of statements while a test condition holds.
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: any LISP expression which returns a list; except the last argument may be any LISP expression. Each of the arguments is evaluated; all except the last must return a list. If all the arguments evaluate to lists, append creates a new list which has as its elements the elements of all the argument lists. Lisp.

Programming, pp. 1–10 (1982). 25.
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Network Working Group D. Farinacci Internet-Draft lispers.net Intended status: Experimental C. Cantrell Expires: March 17, 2021 Nexus September 13, 2020 A Decent LISP Mapping System (LISP-Decent) draft-farinacci-lisp-decent-06 Abstract This draft describes how the LISP mapping system designed to be distributed for scale can also be decentralized for management and trust.

PWConstraints rules are defined in Lisp; but for consistency list, mappend appends all collected sublists (hence the name: map-append or mappend). */. 17 Feb 2018 In fact, for any monoid with a slow mappend , you can use the same Int a (Heap a) (Heap a) instance Monoid (Heap a) where mappend Nil ys = ys mappend xs Nil = xs mappend h1@(Node i x lx “Pure Versus Impure Lisp.

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The mappend! procedure appends the given mutable lists by mutating the tail of each to refer to the next, using set-mcdr!.Empty lists are dropped; in particular, the result of calling mappend! with one or more empty lists is the same as the result of the call with the empty lists removed from the set of arguments.

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