The Julia Language

Defining propertynames for non-struct types is not enough to enable tab completion in the REPL, as is being done with Cptr (analytech-solutions/CBinding.jl#77) and eventually with Ptr (JuliaInterop/Clang.jl#316). It appears to be prevented because of the following isstructtype check: https://github.com/JuliaLang/julia/blob/c95448fb988441

In recent versions (can't say from exactly when), there seems to be an off-by-one error in dcc.DatePickerRange. I set max_date_allowed = datetime.today().date(), but in the calendar, yesterday is the maximum date allowed. I see it in my apps, and it is also present in the first example on the DatePickerRange documentation page.

E

Here is what I mean:

The original array content in the last cell is shown in full and not cut off. Changing n=1000 to n=1000000 can hang and crash the browser tab.

Julia REPL correctly puts an ellipsis:

julia> using MappedArrays
julia> let
       n = 1000
       arr = ran

The solution_summary code doesn't handle infeasible solutions correctly:
https://github.com/jump-dev/JuMP.jl/blob/6901e8f98bf24242a141e003e42530fa90f33c3c/src/print.jl#L463-L482
objective_value and solve_time should probably be wrapped in _try_get, and default fallbacks provided for things like solver_name and raw_status.

Details

(This is related to JuliaPlots/Plots.jl#1706)

For example scatter(skipmissing([1.0, 2.0, missing, 1.0])) fails with Cannot convert Base.SkipMissing{Vector{Union{Missing, Float64}}} to series data for plotting.

Generally skipmissing is not required but it seems odd to see this fail.

Also I stumbled on this while trying to make a histogram, e.g.

I found that function mod2pi is not implemented yet, but mod works. Is there any list of implemented functions? Minimal working example is:

using Zygote

# This is working
gradient(x -> mod(x, 2pi), 1.)

# This is not
gradient(x -> mod2pi(x), 1.)

The following code gives a segfault with Makie 0.15 and Julia 1.6.1 (also reproduced with 1.7-beta2):

using Makie

xs = range(150, 160, length=100)
ys = range(7, 9, length=100)
points = [(x, y, 0.0) for x in xs for y in ys]
x, y, z = map(i -> getindex.(points, i), 1:3)

flags = (153 .< x .< 153.5) .& (7 .< y .< 7.3)
surface(y[flags], x[flags], z[flags]);

Starting Julia

In Exercises 10.1, the outer product in Take the outer product of a vector v with itself and assign it to variable cross_v should be cross product.

The basics of DiscreteSystem exists now, but the little details around it need to be finished.