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marques-work's solution

to Anagram in the LFE Track

Published at Jun 02 2020 · 0 comments
Test suite

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".

For installation and learning resources, refer to the exercism help page.

To run the provided tests, you will need make. Open a terminal window and run the following from the exercise directory:

make test

You should now be able to see the results of the test suite for the exercise.


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.


(defmodule anagram-tests
  (behaviour ltest-unit)
  (export all))

(include-lib "ltest/include/ltest-macros.lfe")

(deftest no-matches
  (is-equal () (anagram:find "diaper" '("hello" "world" "zombies" "pants"))))

(deftest detect-simple-anagram
  (is-equal '("tan") (anagram:find "ant" '("tan" "stand" "at"))))

(deftest does-not-confuse-different-duplicates
  (is-equal () (anagram:find "galea" '("eagle"))))

(deftest eliminate-angram-subsets
  (is-equal () (anagram:find "good" '("dog" "goody"))))

(deftest detect-anagram
    (anagram:find "listen" '("enlists" "google" "inlets" "banana"))))

(deftest multiple-anagrams
    '("gallery" "regally" "largely")
      '("gallery" "ballerina" "regally" "clergy" "largely" "leading"))))

(deftest case-insensitive-subject
    (anagram:find "Orchestra" '("cashregister" "carthorse" "radishes"))))

(deftest case-insensitive-candidate
    (anagram:find "Orchestra" '("cashregister" "Carthorse" "radishes"))))

(deftest does-not-detect-a-word-as-its-own-anagram
    (anagram:find "corn" '("corn" "dark" "Corn" "rank" "CORN" "cron" "park"))))
(defmodule anagram
  (export (find 2)))

(defun find (subj candidates)
  "finds candidates that are anagrams of the subject"
  (let* ((lowered (string:lowercase subj))
         (hashed (lists:sort lowered)))
      (lambda (word)
          (!= lowered (string:lowercase word))
          (== hashed (lists:sort (string:lowercase word)))))

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