show of 0-dimensional array misleading

[maleadt]

julia> using Test

julia> a = zeros(Int)
0-dimensional Array{Int64,0}:
0

julia> @test a == 0
Test Failed at REPL[12]:1
  Expression: a == 0
   Evaluated: 0 == 0
ERROR: There was an error during testing

julia> @test a[] == 0
Test Passed

Not sure what to do here since we don't have a short syntax for 0-dimensional arrays.

[vtjnash]

Seems to be intentional:

303 # 0-dimensional arrays
304 print_array(io::IO, X::AbstractArray{T,0} where T) =
305     isassigned(X) ? show(io, X[]) :
306                     print(io, undef_ref_str)

But I'm not sure these are really desirable formats, except for 1-d and 2-d cases:

julia> println(zeros(Float32))
0.0

julia> println(zeros(Float32, 2))
Float32[0.0, 0.0]

julia> println(zeros(Float32, 2, 2))
Float32[0.0 0.0; 0.0 0.0]

julia> println(zeros(Float32, 2, 2, 2))
Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

julia> println(zeros(Float32, 2, 2, 2, 2))
Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

julia> println(zeros(Float32, 2, 2, 2, 2, 2))
Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Float32[0.0 0.0; 0.0 0.0]

Not sure what to do here since we don't have a short syntax for 0-dimensional arrays.

Sure we do: 🙂

julia> fill(1.0)
0-dimensional Array{Float64,0}:
1.0

[eulerkochy]

Intended display @vtjnash ?

[JeffBezanson]

Ways we could display this:

fill(0)

reshape([0], ())

Any other ideas?

[JeffBezanson]

Triage says 👍 to changing this.

[mbauman]

I'm favoring fill(0).