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jmorais's solution

to Anagram in the Common Lisp Track

Published at Mar 19 2020 · 0 comments
Instructions
Test suite
Solution

Given a word and a list of possible anagrams, select the correct sublist.

Given "listen" and a list of candidates like "enlists" "google" "inlets" "banana" the program should return a list containing "inlets".

Setup

Check out Installing Common Lisp for instructions to get started or take a look at the guides available in the track's side bar.

Formatting

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VIM

Use the following commands to ensure VIM uses only spaces for indentation:

:set tabstop=2
:set shiftwidth=2
:set expandtab

(or as a oneliner :set tabstop=2 shiftwidth=2 expandtab). This can be added to your ~/.vimrc file to use it all the time.

Emacs

Emacs is very well suited for editing Common Lisp and has many powerful add-on packages available. The only thing that one needs to do with a stock emacs to make it work well with exercism.io is to evaluate the following code:

(setq-default indent-tabs-mode nil)

This can be placed in your ~/.emacs (or ~/.emacs.d/init.el) in order to have it set whenever Emacs is launched.

One suggested add-on for Emacs and Common Lisp is SLIME which offers tight integration with the REPL; making iterative coding and testing very easy.

Source

Inspired by the Extreme Startup game https://github.com/rchatley/extreme_startup

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

anagram-test.lisp

(ql:quickload "lisp-unit")
#-xlisp-test (load "anagram")

(defpackage #:anagram-test
  (:use #:common-lisp #:lisp-unit))

(in-package #:anagram-test)

(define-test no-matches
  (assert-equal '()
      (anagram:anagrams-for
       "diaper"
       '("hello" "world" "zombies" "pants"))))

(define-test detect-simple-anagram
  (assert-equal '("tan")
      (anagram:anagrams-for "ant" '("tan" "stand" "at"))))

(define-test does-not-confuse-different-duplicates
  (assert-equal '() (anagram:anagrams-for "galea" '("eagle"))))

(define-test eliminate-anagram-subsets
  (assert-equal '() (anagram:anagrams-for "good" '("dog" "goody"))))

(define-test detect-anagram
  (assert-equal '("inlets")
      (anagram:anagrams-for
       "listen"
       '("enlists" "google" "inlets" "banana"))))

(define-test multiple-anagrams
  (assert-equal '("gallery" "regally" "largely")
      (anagram:anagrams-for
       "allergy"
       '("gallery" "ballerina" "regally" "clergy" "largely" "leading"))))

(define-test case-insensitive-anagrams
  (assert-equal '("Carthorse")
      (anagram:anagrams-for
       "Orchestra"
       '("cashregister" "Carthorse" "radishes"))))

(define-test word-is-not-own-anagram
  (assert-equal '()
      (anagram:anagrams-for "banana" '("banana"))))

(define-test word-is-not-own-anagram-case-insensitively
  (assert-equal '()
      (anagram:anagrams-for "bananarama" '("BananaRama"))))

#-xlisp-test
(let ((*print-errors* t)
      (*print-failures* t))
  (run-tests :all :anagram-test))
(in-package #:cl-user)
(defpackage #:anagram
  (:use #:common-lisp)
  (:export #:anagrams-for))

(in-package #:anagram)


(defun anagram (word1 l)
  (let ((l1 0)(l2 0))
    (dolist (x l)
      (print x)
      (if (not (eql (length x) (length word1)))
          nil
          (push (charin word1 x) l1)))
    (setf l2 (delete nil l1))
    l2))
   ;;;(delete nil (map 'list #'charin word l))
 

(defun charin (str str1)
  (let ((l 0) (caract nil))
    (dotimes (x (length str) nil)
      (print x)     
      (setf caract (char str x))
      (print caract)
      (push (find caract str1) l))
    (if (eql (count nil l) 0)
        str1
        nil)))

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