@AntiEarth I'm dumb but that makes sense

why does f2[2,3] not work?

Just want to try if assign a function to a variable work or not.

@anhnha A function in Wolfram Language is defined f[x_, y_] := x + y or f = Function[{x, y}, x + y]. What you're doing is f = x + y where x and y are undefined symbols and f is just a variable... so naturally, when you write f[2,3] you then replace f with the value of that variable, which is x + y. So it becomes (x + y)[2, 3].

@AntiEarth maybe, just maybe, you could do this by looking for the limited number of ways in which patterns can constrain the range of numbers. For example,> and < set lower and upper limits, respectively. Alternatives (as in your example) has a max and a min. After you've found the max and min you could just generate all the number in that range and use Cases to select the valid ones.

@C.E. yes, I knew that function definition but curious why the first one f1 works while f2 does not.

@anhnha Note the similarity between Compile[..., x + y] and Function[{x, y}, x + y]. Also note the difference between := (normally used for function definitions) and = (used with Compile and Function).

It's a very basic question and as it often is with basic questions, it's hard to know where to start. I guess one example would be if you take x = 5 and then write x[10] what would you expect to happen? Well, we know that Mathematica always evaualtes the heads, so clearly (at least to me) this should evaluate to 5[10]. And it's the same thing that's happening in your case.

that makes sense

reading Compile function working that way made me wonder if that works for general functions

but this doesn't work

I want "c" to be anything.

It's a real shame the Wolfram Cloud android app doesn't use the device location for Here. Lots of cool stuff you coulda built with that.

I don't get why EntityRegister doesn't mean that the EntityStore isn't stored between sessions. What's the point then - I'm not going to re-run all the code to create the entitystore every time I want to use it

@CarlLange Well, entity stores can be stored in other ways. It's just not the purpose of EntityRegister.

init.m seems like a reasonable place to register an entity store that one always wants to be available.

@C.E. Yeah, I guess. I guess I just got a bit surprised that I didn't see an example in the docs of how to store them after an hour or two of messing with the syntax to get an EntityStore actually working nicely. I think I might use ResourceRegister or similar to store it, but I haven't tried it out.

With version 12.2 Mathematica has made a huge progress in the importation of pdf files. I have imported 2200 files as PlainText, Images, PageImage : No problem. Before 12.2 It didn't work in almost 40% of cases.

Problem : The good questions mentioning pdf import use linked example files. These are old question and the links are broken. It's Impossible to try again to update the answer.

I'll be back tomorow.