[muraiki]

I guess there are at least two schools of thought for programming books. There's the one you mention, and there's a different approach that you'll see here and in other books like Learn You a Haskell for Great Good, Brave Clojure, and perhaps most famously, why's (poignant) Guide to Ruby.

I think that there's a place for both of these styles in the world. And perhaps this style can appeal to a person who struggles with the stereotype of computer programming as a serious, dry affair, bereft of human expression, the job of coder cogs in programming factories. Perhaps you could say that the serious style appeals to more people, but maybe that is actually a criticism of the population of programmers, and not of the work?

In regards to sounding childish, I find that in general to be an unusual criticism. Perhaps there are people who speak this way as adults simply because that is who they are? I guess C.S. Lewis sums up my feelings about "being childish":

Critics who treat 'adult' as a term of approval, instead of as a merely descriptive term, cannot be adult themselves. To be concerned about being grown up, to admire the grown up because it is grown up, to blush at the suspicion of being childish; these things are the marks of childhood and adolescence. And in childhood and adolescence they are, in moderation, healthy symptoms. Young things ought to want to grow. But to carry on into middle life or even into early manhood this concern about being adult is a mark of really arrested development. When I was ten, I read fairy tales in secret and would have been ashamed if I had been found doing so. Now that I am fifty I read them openly. When I became a man I put away childish things, including the fear of childishness and the desire to be very grown up.

[unfamiliar]

I agree that there is a place for both styles in the world. Unfortunately when it comes to rust most of the tutorial seem to be in this style, and I thought at least the "advanced" guide would be more "sensible". I enjoyed Learn You a Haskell, but that was an introductory text. If I am reading an "advanced" text on a systems programming language I probably expect it to be a little more formal.

>In regards to sounding childish, I find that in general to be an unusual criticism. Perhaps there are people who speak this way as adults simply because that is who they are?

First off, maybe it wasn't the best word for me to use. However, the second statement is a tautology; of course if they are childish then that is "who they are": childish people. The term to me doesn't denote an interest in "childish" things, like the CS Lewis quotation seems to say. Rather it denotes "not fully emotionally developed" which is usually a judgement placed on their current behaviour. You can read all the fairy tale books you like, I don't care. But if you start exhibiting the negative behaviours typical of children - selfishness, irresponsibility, etc - then yes, you are a bad person and deserve to be called out for it. (I'm not suggesting this at all about the author - this is now a separate discussion.)

[muraiki]

I was reluctant to quote Lewis because there is more context to his ideas than can be conveyed in that quote. The negative behaviors you describe aren't typical of just children: they are typical of all of fallen, broken humanity. It's just that children are more honest in being direct about those negative behaviors. :)

Since we associate these negative behaviors with "childishness," we risk throwing out the good with the bad: we lose imagination, wonder, honesty, playfulness, etc.

I realize that you aren't suggesting the author has those negative behaviors. I'm only trying to provide a greater context to Lewis' quote. Perhaps I should have just stated this argument on my own; I apologize for any confusion.