[Haskell-cafe] Byte Histogram

[Andrew Coppin]

>> For what it's worth I saw the problems in your counting examples right
>> away, without reading the explanatory text below.
>
> Yes, they were pretty obvious with enough experience. For beginners I
> expect it to be a rather insidious trap.

Beginners or anybody coding Haskell while not completely awake. ;-)

>> Hopefully that means
>> that it's possibly to learn how to spot such things without resorting
>> to e.g. running the program or reading Core *gasp*.
>
> Within limits. Detrimental laziness or strictness can be arbitrarily well
> hidden.

I agree. Unfortunately... :-/