nim-lang/Nim

Nim is a compiled, garbage-collected systems programming language which has an excellent productivity/performance ratio. Nim's design focuses on efficiency, expressiveness, elegance (in the order of priority).

Kaushal Modi

@kaushalmodi

any comment about why Person[0] doesn't work? should it work?

Vindaar

@Vindaar

If I'm not mistaken there was something specific about tuples and indexing by integer

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@FromIRC

<Araq> the index must be a constant

Kaushal Modi

@kaushalmodi

It is a constant in that example above

Vindaar

@Vindaar

Oh, I only just realized that you're trying to access the field of the type and not of the specific instance in the latter part. No idea if that should work.

Kaushal Modi

@kaushalmodi

but TupleType.FieldName works..

we are just check if a field exists.. doing type.field is meaningless otherwise

Vindaar

@Vindaar

Well, the compilation error for that is Error: no generic parameters allowed for Person, which sort of makes sense I guess, since it's the same syntax you'd use for generics

Kaushal Modi

@kaushalmodi

hmm, makes sense

so it just happens that the square brackets are generics syntax, else it would have worked

are purely numerical generics possible?

I mean, can a type be just a number?

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@FromIRC

<TheLemonMan> static[T] to the rescue

Kaushal Modi

@kaushalmodi

@Vindaar On the flip side, just Person.age (from that above example) error too nim_src_YckhwY.nim(8, 12) Error: type mismatch: got <type int>

but echo compiles(Person.age) returns true

as expected

TheLemonMan: I didn't understand how static[T] can be used here

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@FromIRC

<TheLemonMan> you asked "I mean, can a type be just a number"

Vindaar

@Vindaar

Person.age simply returns the type of Person. So the error in your case is that you're doing something with it that doesn't work for a type (I guess you just removed the compiles around it?)

of age in Person I meant

So if you import typetraits it should now echo int

Kaushal Modi

@kaushalmodi

TheLemonMan: ah, OK. I meant something like Option[123] would never be valid, right?

@Vindaar ah, OK to you too :)

so the problem is that the generic parsing kicks on, on seeing Person[0] instead of returing the type of Person[0]

Vindaar

@Vindaar

what TheLemonMan was referring to is

type
  Person2[N: static[int]] = tuple
    name: string
    ages: array[N, int]

let person2: Person2[2] = ("Peter", [1, 2])
echo person2

so yes, soemthing like that is allowed

Kaushal Modi

@kaushalmodi

pretty neat

thanks!

Vindaar

@Vindaar

Kaushal Modi

@kaushalmodi

type
  Person[N: static[int]] = tuple
    name: string
    childrenAges: array[N, int]

let 
  p0: Person[0] = ("Peter", [])
  p1: Person[1] = ("Peter", [1])
  p2: Person[2] = ("Peter", [1, 2])
  p3: Person[3] = ("Peter", [1, 2, 3])
echo p0
echo p1
echo p2
echo p3

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@FromIRC

<FromDiscord> <Shield> how do I make nim generate readable assembly code?

<Araq> --lineDir:on and pass some flags to gcc/clang that keep the produced asm

<Araq> I can never remember what that switch is called, -S ?

Clyybber

@Clyybber

@rayman22201 It certainly does look interesting. It also doesn't claim to have "innovative" features, though I think the term rewriting is an interesting approach to what is essentially a macro.

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@FromIRC

<TheLemonMan> @dom96, ping

<FromDiscord> <Shield> where is the asm kept? I didn't find it in nimcache

Mamy Ratsimbazafy

@mratsim

in the .o objects in nimcache

but you should take the .c files in nimcache copy paste the gcc command that was used to produce them and add -S

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@FromIRC

<Araq> no, you can use --passC:"-S"

<FromDiscord> <Shield> it worked, thanks!

Rubi

@codenoid

i want ask something about algorithm

total_post = 8
total_post_per_page = 5

ex : total_post = 8 == 2 page

ex : total_post = 14 == 3 page

how to find total page by total_post and total_post_per_page

i'm bad at math xD

i was think about
total_post/total_post_per_page # -> to even, ex 8/5 1.6 > 2 (2 page)

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@FromIRC

<TheLemonMan> pages = (posts / posts_per_page) + 1

dm1try

@dm1try

ex : total_post = 10 == 2 page

Rubi

@codenoid

yes like that @dm1try

Vindaar

@Vindaar

@codenoid, @dm1try refers to the fact that TheLemonMan's formula breaks for 10 posts. I'd go with let pages = ceil(posts / posts_per_page)

maybe convert back to int if that's what you need

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ex : total_post = 8 == 2 page

ex : total_post = 14 == 3 page

ex : total_post = 10 == 2 page