Meeting du 20050324

  • Lieu: Bureaux d'Octo et Pivolis au 50 avenue des Champs-Elysees, 6eme, a 18:30

Participants:

ParticipantsExposé possibleIntéressé par...
Vincent MassolDojo 
Luis Arias tout !
Ludovic Dubost tout !
Arnaud Héritier Euhhh ?? tout ! :-)
Charles Gay  
Marc Antoine GarrigueDojo 
Bernard Notarianni Bah tout alors...
Hervé Boutemy Aspect
Dimitri BAELI Dojo
P@ ChanezonVous avez deja eu droit a ROME, mais j'ai une nouvelle preso plus generale sur la syndication et ses application, qui pourrait vous interesser. Je l'ai donne pour la premiere fois la semaine derniere, et la redonnerai a javaone cet eteDojo + Pojo = Muy Mojo! ca a l'air rigolo
Alexandre Vasseurpas là mais surement qu'il faut parler de "!cflowbelow", "pertypewithin", "concrete-aspect", xml, Deployer.deploy, "if", "-XlazyTjp" (il n'y a pas une solution unique bien sûr!)Aspect(Werkz/J5)

Description:

Dojo avec Laurent Bossavit et Emmanuel Gaillot (coordonne par Marc-Antoine).

Les règles du jeu --

  • il s'agit de coder un scénario utilisateur de bout en bout, devant dans l'ordre : a) passer tous les tests de recette décrits à l'avance, b) être le plus simple possible, c) avoir un temps d'exécution et une occupation mémoire "acceptables" (on entend par là qu'il n'existe pas de solution de complexité équivalente améliorant le temps de traitement et la taille mémoire occupé d'un facteur significatif)
  • le codage se fait entièrement sur place: on part "de zéro" le jour du Dojo, même si on a préparé chez soi ("Leave your relics behind")
  • le codage se fait en public, et en temps limité
  • chacun doit pouvoir coder la solution chez lui, avec tout ou partie des outils indiqués. Il est possible d'utiliser un framework si nécessaire, mais il doit être "déclaré" à l'avance.
Pour en savoir plus sur le "Dojo Développement" -- Sujets proposés (descriptions ci-dessous)
  • Aspect de Log
  • Calcul de réductions
  • ...
Aspect de Log

Le sujet de ce premier Dojo est "Ecrire un Aspect de Log" (voire le logifier complet - http://blogs.codehaus.org/people/vmassol/archives/000877_logifier.html - si on a plus de temps). Afin de retirer toute l'experience du Dojo il est bon que chacun arrive en ayant reflechi au sujet. Donc venez le 24 avec vos idees sur le sujet.

[Note : les tests de recette et éventuels pré-requis techniques (framework aspect, etc.) restent à être fournis]

Calcul de réductions

Un libraire en ligne veut faire des promos de Noël sur la collection "Harry Potter". Il y a actuellement 5 tomes différents disponibles, identifiés par les codes 0, 1, 2, 3, et 4. Chaque tome vendu séparément coûte 8 euros. Si un client achète deux tomes différents en même temps, il bénéficie d'une réduction de 5% sur ces deux tomes. S'il achète trois tomes différents, la réduction est de 10% sur ces tomes. Quatre tomes, réduction de 20 % ; et si le client achète la grande totale (5 tomes différents), il bénéficie royalement de 25% de réduction sur ces 5 tomes. Il est possible de bénéficier de plusieurs offres de réduction pour un même achat groupé, mais chaque livre acheté ne contribue qu'à une seule réduction à la fois. Lorsque deux combinaisons de réduction sont possibles -- par exemple, lorsque le client achète 5 tomes différents, on peut soit appliquer la réduction pour les 5 tomes, soit la réduction pour 2 tomes et la réduction pour 3 tomes -- c'est celle qui offre la plus grande réduction globale qui est retenue.

Il s'agit d'implémenter la fonction qui, prenant en entrée la liste des identifiants des livres qu'un client souhaite acheter, calcule le montant total à payer.

Outils à disposition : un langage de programmation au choix, sa librairie standard, son compilateur / interpréteur, et son environnement d'exécution.

Les tests de recette sont les suivants (j'utilise une syntaxe ruby, à traduire dans un autre langage si désiré).

def testCasBasiques
  assert_equal(0, montantTotal([]))
  assert_equal(8, montantTotal([0]))
  assert_equal(8, montantTotal([1]))
  assert_equal(8, montantTotal([2]))
  assert_equal(8, montantTotal([3]))
  assert_equal(8, montantTotal([4]))
  assert_equal(8 * 2, montantTotal([0, 0]))
  assert_equal(8 * 3, montantTotal([1, 1, 1]))
end

def testReductionsSimples assert_equal(8 * 2 * 0.95, montantTotal([0, 1])) assert_equal(8 * 3 * 0.9, montantTotal([0, 2, 4])) assert_equal(8 * 4 * 0.8, montantTotal([0, 1, 2, 4])) assert_equal(8 * 5 * 0.75, montantTotal([0, 1, 2, 3, 4])) end

def testPlusieursReductionsCombinees assert_equal(8 + (8 * 2 * 0.95), montantTotal([0, 0, 1])) assert_equal(2 * (8 * 2 * 0.95), montantTotal([0, 0, 1, 1])) assert_equal((8 * 4 * 0.8) + (8 * 2 * 0.95), montantTotal([0, 0, 1, 2, 2, 3])) assert_equal(8 + (8 * 5 * 0.75), montantTotal([0, 1, 1, 2, 3, 4])) end

def testCasTordu assert_equal(2 * (8 * 4 * 0.8), montantTotal([0, 0, 1, 1, 2, 2, 3, 4])) end

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Version 1.37 last modified by XWikiGuest on 06/09/2005 at 19:26

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XWikiGuest | 06.09.2005 at 07:26 PM
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Creator: Luis Arias on 08/03/2005 at 12:50
Copyright (c) 2004 Contributing Authors
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