Perceptron with associative array

[erelsgl]

I wrote a perceptron with a small modification - allowing the weights (and features) to be strings. This may be more natural in settings such as text caterogization. Example:

var bird = perceptron()
bird.train({'wings': 2, 'legs': 2}, 1)
bird.train({'wings': 0, 'legs': 2}, 0)
bird.train({'wings': 2, 'legs': 4}, 0)
bird.train({'wings': 0, 'legs': 4}, 0)
while(!bird.retrain());

test.equal(bird.perceive({'wings': 2, 'legs': 2}), 1)
test.equal(bird.perceive({'wings': 0, 'legs': 2}), 0)
test.equal(bird.perceive({'wings': 2, 'legs': 4}), 0)
test.equal(bird.perceive({'wings': 0, 'legs': 4}), 0)

Would you like to add it?