On Wednesday, October 14, 2015 at 11:40:19 AM UTC-4, Isaiah wrote:
>
> Q1) where to find julia macro tutorials (beyond the standard manual)?
>
>
> I'm not aware of any tutorials, but there were several JuliaCon talks that
> are related to some of the nittier details if you are interested [1]. If
> anything in the manual is unclear or could use more explanation, please do
> make suggestions. (we're trying to make it accessible for people with no
> macro background as well as advanced Lispers)
>
one specific thing that had me lost for a while was how to splat n a list
of values (the old ,@ LISP operator)
for a while, this looked like the best option
ex= quote end
# some loop
push!(ex, someExpx)
then i found the wonder of ellipses. e.g. in my code
type $(typename)
$(ones...)
end;
so I'd add that to the doco.
> Q2) ... improvements
>
>
two specific improvements would be
1) "your top 10 most useful macros" into which I'd include @task
2) some macro examples in the doco whose complexities are a little more
complex that @assert and @memo and a little less complex that
Parameters.jl.
just one idea on the second point. the other day for my SE modeling class I
wrote a little python DSL for compartmental models. For fill details,
see https://github.com/txt/mase/blob/master/src/dsl101.md. But here's what
a subclass method of a Model class you have to offer to make the
compartments flow
def have(i):
return o(C = S(100), D = S(0),
q = F(0), r = F(8), s = F(0))
def step(i,dt,t,u,v):
def saturday(x): return int(x) % 7 == 6
v.C += dt*(u.q - u.r)
v.D += dt*(u.r - u.s)
v.q = 70 if saturday(t) else 0
v.s = u.D if saturday(t) else 0
if t == 27: # special case (the day i forget)
v.s = 0
what would the **simplest** macros that you could do something like this in
a Julia DSL for compartmental models?
-- @timmenzies
>
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