- Question: https://stackoverflow.com/questions/50243523
- Snapshot:
- See detailed step by step solution: https://github.com/sundawning/literate-programming/blob/master/english-to-nato-and-vice-verse.org
- Why answer this homework?
Why not. - Answer(There is actually no final answer, many places in the code can be improved.)
(defun natos-englishs () (list '(Alfa Bravo Charlie Delta Echo Foxtrot Golf Hotel India Juliet Kilo Lima Mike November Oscar Papa Quebec Romeo Sierra Tango Uniform Victor Whiskey Xray Zulu) '(A B C D E F G H I J K L M N O P Q R S T U V W X Z))) (defun convert-nato-english (item) (destructuring-bind (natos englishs) (natos-englishs) (cond ((member item natos) (nth (position item natos) englishs)) ((member item englishs) (nth (position item englishs) natos)) (t (error "Unvalid"))))) (defun -mapcar (function list) (if (null list) nil (cons (funcall function (car list)) (-mapcar function (cdr list))))) (defun format-lists (function lists) (format nil "~{~{~A~}~^ ~}" (-mapcar (lambda (list) (-mapcar function list)) lists))) (defun conve (english-lists) (format-lists (lambda (english) (string-capitalize (write-to-string (convert-nato-english english)))) english-lists)) (defun convn (nato-lists) (format-lists (lambda (nato) (write-to-string (convert-nato-english nato) :case :downcase)) nato-lists))
(list (conve '((P R O) (L A N))) (convn '((Papa Romeo Oscar) (Lima Alfa November))))
("PapaRomeoOscar LimaAlfaNovember" "pro lan")
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