October 10, 2008, at 11:50 PM
Logbook /

20081010

notice the contrast with Zuckerberg's business model stunt :P

A few days ago Thibaut from Vendido introduced me to Springwise a super source of inspiration ... today's latest post is about CitizenShipper, brilliant!

The COlivri privacy policy doesn't take 10 minutes to read. 200h per year for a casual web user baby!

Last but not least, this afternoon I spent some time with Raphael playing with the mastermind implementation (which I fixed it for the second time :P).

Thursday morning Arnaud showed me an Haskell implementation which I found unreadable but wanted to see if I could go more functional in Python ... Where, Why, When and How to Refactor. The least I can say is that I am not impressed but would love to discuss the matter during a Coding Dojo!

# procedural ...
def play(self, guess):
    """ play return a tuple (correct, misplaced) """

    correct = list()
    new_secret = list()
    new_guess = list()
    for index, peg in enumerate(guess):
        if self.secret[index]==peg:
            correct.append(peg)
        else:
            new_secret.append(self.secret[index])
            new_guess.append(guess[index])

    misplaced = list()
    for peg in new_guess:
        if peg in new_secret:
            misplaced.append(peg)
            new_secret.remove(peg)

    return len(correct), len(misplaced)
# functional ...
def play(self, guess):
    """ play return a tuple (correct, misplaced) """

    if self.secret == guess:
        return len(guess), 0

    not_correct = [(s,g) for (s,g) in zip(self.secret, guess) if s!=g]
    new_secret, new_guess = map(list, zip(*not_correct))
    misplaced = sum(
        min(new_secret.count(g), new_guess.count(g))
        for g in set(new_guess)
                    )
    return len(guess) - len(not_correct), misplaced

Speaking with Xavier and José about it, the cognitive load of the functional version is probably too heavy for future maintainability ... puzzling :P

At least in the process I learnt how to use the python built-in function zip and why unzip is un-needed in Python (via Matt Wilson).

Last but not least, wonder no more about the difference between simplicity and emptiness, the later is a receptacle for creativity. Kenya Hara may not be the best speaker but ...

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