So here is a new attempt at the quantize function so that I no longer have
to deal with the "infinity" problem:
(defn quantize-2
[x params]
(let [f (partial (fn [a [b c]] (cond(<= a c) b)) x)]
(println (first (filter #(not (nil? %))(map f (into [](partition 2
params))))))
(or
(first (filter #(not (nil? %)) (map f (into [](partition 2 params)))))
(last params))))
params now has this form:
[:zone-1 120 :zone-2 150 :zone-3 165 :zone-4 180 :zone-5]
i.e. the values to return are intermingled with the "boundaries". I
normally don't like mixing things but you've gotta admit that it looks just
like how you would draw heart rates on a schema on paper: zone1 | zone 2 |
zone 3 | zone 4 | zone 5 and you would probably have the values 120, 150,
165 and 180 written in between the zone names, just above the | characters.
The way I got rid of the infinity is by using the "or". I'm looking for the
first non null value (when trying to find whether x is <= 120, <= 150,
<=165, <=180, and if I don't find any, then it must be that we're in the
last "category" of my params collection.
Still not sure whether it's the optimum way to do it but I'll continue
researching (after all, this is not a professional project, I have no
deadline, and I can keep trying to improve - great way to learn).
The feedback I got on this post got me working and scratching my head all
weekend. This is great.
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