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PhilippeNoel1's solution

to Two Fer in the Emacs Lisp Track

Published at Aug 07 2020 · 0 comments
Test suite

Two-fer or 2-fer is short for two for one. One for you and one for me.

"One for X, one for me."

When X is a name or "you".

If the given name is "Alice", the result should be "One for Alice, one for me." If no name is given, the result should be "One for you, one for me."



Submitting Incomplete Solutions

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


;;; two-fer-test.el --- Tests for Two-fer (exercism)

;;; Commentary:
;; Common test data version: 1.2.0 4fc1acb

;;; Code:

(load-file "two-fer.el")

(ert-deftest no-name-given ()
  (should (string= (two-fer) "One for you, one for me.")))

(ert-deftest a-name-given ()
  (should (string= (two-fer "Alice") "One for Alice, one for me.")))

(ert-deftest another-name-given ()
  (should (string= (two-fer "Bob") "One for Bob, one for me.")))

(provide 'two-fer-test)

;;; two-fer-test.el ends here
;;; two-fer.el --- Two-fer Exercise (exercism)

;;; Commentary:

;;; Code:

(defun two-fer(&optional arg)
  (let ((name (if arg arg "you")))
  (concat "One for " name ", one for me.")))

(provide 'two-fer)
;;; two-fer.el ends here

(message "bonjour")

What can you learn from this solution?

A huge amount can be learned from reading other people’s code. This is why we wanted to give exercism users the option of making their solutions public.

Here are some questions to help you reflect on this solution and learn the most from it.

  • What compromises have been made?
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