I am joining this conversation late, so how do I access the scheme tutorial?
On Sun, Jul 24, 2022, 7:30 AM Jean Abou Samra <j...@abou-samra.fr> wrote: > > > Ouch! I see what you mean. And this is meant to be simplified? But the > > problem really is that if a user tries to use an identifier with an > > illegal syntax, how do they know? This is rather like those really > > annoying websites which ask you to choose a password, and then tell > > you that it's illegal without telling you why. > > > > > Simple: don't use too weird identifiers :-) > > I'll try to rephrase that part again. The point of mentioning this is > to explain that '+', '-', '*', '/' are just procedures, not special > syntax, and to address the question that I imagine this immediately raises > in the mind of a reader used to more mainstream programming languages: > "what, a procedure called '+', is that really valid"? There are also > two conventions that are useful to know: > > - question mark at the end of a predicate (explained later in > the tutorial), > - exclamation mark at the end of a side-effecting procedure > (I'm not showing any of these in this basic tutorial, so > I didn't explain it). > > It's not really encouraged to get creative about special characters in > your variable names. Just stick with the conventions. > > Cheers, > Jean > > >
