How to resolve the algorithm Associative array/Iteration step by step in the Common Lisp programming language

Published on 12 May 2024 09:40 PM
#Common lisp

How to resolve the algorithm Associative array/Iteration step by step in the Common Lisp programming language

Table of Contents

Problem Statement

Also show how to iterate just over the keys, or the values, if there is a separate way to do that in your language.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Associative array/Iteration step by step in the Common Lisp programming language

Source code in the common programming language

;; iterate using dolist, destructure manually
(dolist (pair alist)
  (destructuring-bind (key . value) pair
    (format t "~&Key: ~a, Value: ~a." key value)))

;; iterate and destructure with loop
(loop for (key . value) in alist
      do (format t "~&Key: ~a, Value: ~a." key value))


(loop for (key value) on plist :by 'cddr
      do (format t "~&Key: ~a, Value: ~a." key value))


(maphash (lambda (key value)
           (format t "~&Key: ~a, Value: ~a." key value))
         hash-table)


(loop for key being each hash-key of hash-table using (hash-value value)
      do (format t "~&Key: ~a, Value: ~a." key value))


(with-hash-table-iterator (next-entry hash-table)
  (loop
   (multiple-value-bind (nextp key value) (next-entry)
     (if (not nextp)
       (return)
       (format t "~&Key: ~a, Value: ~a." key value)))))


;; Project : Associative array/Iteration

(setf x (make-array '(3 2)           
           :initial-contents '(("hello" 13 ) ("world" 31) ("!" 71))))
(setf xlen (array-dimensions x))
(setf len (car xlen))
(dotimes (n len)  
               (terpri)
               (format t "~a" (aref x n 0))
               (format t "~a" " : ") 
               (format t "~a" (aref x n 1)))

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