Following the docs example , we get matrices to be printed with the “compact” form of the elements: julia> [Polar(3, 4.0) Polar(4.0,5.3)] 1×2 Matrix{Polar{Float64}}: 3.0ℯ4.0im 4.0ℯ5.3im and also with a dict with vector values, which is good because the vectors are “horizontal”: julia> Dict(1 => …

One idea, following the same docs example : function println_vec(io::IO, v::Vector{Polar{Float64}}) iob = IOBuffer() show(IOContext(iob, :compact=>true), v) str = String(take!(iob)) ('[' in str) && (str = '[' * last(split(str,'['))) println(io, str) end function Base.show(io::IO…

[image] rafael.guerra: iob = IOBuffer() show(IOContext(iob, :compact=>true), v) str = String(take!(iob)) Where in the manual did you find this? (or how else did you find it?)

Now, for example, if following the same example I want to print a vector of matrices, the problem occurs again: julia> [Polar(3, 4.0) Polar(4.0,5.3)] # matrix is printed in compact form 1×2 Matrix{Polar{Float64}}: 3.0ℯ4.0im 4.0ℯ5.3im julia> [ [Polar(3, 4.0) Polar(4.0,5.3)] ] # but inside a vect…

I don’t think defining methods like Base.show(io::IO, ::MIME"text/plain", vv::Vector{Vector{Polar{Float64}}}) is a good idea; Base already defines show for Vector, so this is piracy IIUC, and breaks composability as you pointed out. I think probably the fix is for Base to set compact to true when p…

If the piracy pointed out by Eric is acceptable, we could extend the methods for vectors and matrices using type unions: function println_vec(io::IO, u::Union{Vector{T}, Matrix{T}}) where T iob = IOBuffer() show(IOContext(iob, :compact=>true), u) str = String(take!(iob)) ('[' in str…

No, that’s not piracy if one own the element type. But the issue is the consistency when printing nested containers.

Printing vector of vectors with :compact output

General Usage

rafael.guerra March 4, 2025, 11:45pm 4

Not really from the manual, but from the scattered tips that the masters reveal here in Discourse or SO and that I try to put together. For part of that code snippet see here.

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Printing vector of vectors with :compact output

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