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Tableau avec des รฉlรฉments tous diffรฉrents ?

Le cadre

Un tableau peut contenir plusieurs fois le mรชme รฉlรฉment. C'est le cas du tableau tableau_1 ci-dessous :

๐Ÿ Script Python
tableau_1 = [1, 9, 3, 6, 9, 4, 5]
La valeur 9 est prรฉsente deux fois dans ce tableau.

Au contraire, dans le tableau tableau_2, toutes les valeurs sont uniques :

๐Ÿ Script Python
tableau_2 = ['chien', 'chat', 'lion', 'poisson']

Exercice

Coder une fonction tous_diffรฉrents qui prend en paramรจtre un tableau et renvoie un boolรฉen indiquant si toutes les valeurs de tableau sont diffรฉrentes ou non.

๐Ÿ‘ On garantit que la taille du tableau est petite, de maniรจre ร  accepter un algorithme de cout quadratique (une double boucle).

Aide

On pourra faire une double boucle avec indice, pour dรฉtecter un doublon.

Ou bien (mieux) utiliser un dictionnaire !

Guide
๐Ÿ Script Python
def tous_diffรฉrents(tableau):
    n = len(tableau)
    for i in range(...):
        for j in range(...):
            if ...:
                return False
    return True
def tous_diffรฉrents(tableau):
...
# Tests
tableau1 = [1, 2, 3, 6, 2, 4, 5]
assert tous_diffรฉrents(tableau1) is False
tableau2 = ["chien", "chat", "lion", "poisson"]
assert tous_diffรฉrents(tableau2) is True
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###(Dรฉs-)Active le code aprรจs la ligne # Tests (insensible ร  la casse)
(Ctrl+I)
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Entrer ou sortir du mode "plein รฉcran"
(Esc)
rounded
>>> 
 
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Tronquer ou non le feedback dans les terminaux (sortie standard & stacktrace / relancer le code pour appliquer)
Si activรฉ, le texte copiรฉ dans le terminal est joint sur une seule ligne avant d'รชtre copiรฉ dans le presse-papier
ร‰valuations restantes : 5/5
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