在 julia REPL 上调用什么函数来显示(数组)变量?

What functions are called to display an (Array) variable on the julia REPL?

假设我输入:

julia> X = randn(3,4)
3x4 Array{Float64,2}:
 -0.862092   0.78568     0.140078  -0.0409951
 -0.157692   0.0838577   1.38264   -0.296809 
  1.40242   -0.628556   -0.500275   0.258898 

调用了哪些函数来生成给定的输出?

请注意,重载 Base.show 似乎不足以改变这种行为,所以我不确定该去哪里。

julia> Base.show(io::IO, A::Array{Float64, 2}) = println("Humbug")
show (generic function with 120 methods)

julia> X
3x4 Array{Float64,2}:
 -0.862092   0.78568     0.140078  -0.0409951
 -0.157692   0.0838577   1.38264   -0.296809 
  1.40242   -0.628556   -0.500275   0.258898 

是否可能需要更改 Base/array.jl 源代码并重建 julia 才能使这种更改生效?请注意这与用户定义类型之间的区别:

julia> type foo
       x::Float32
       s::ASCIIString
       end

julia> ob = foo(1., "boo")
foo(1.0f0,"boo")

julia> Base.show(io::IO, someob::foo) = print("Humbug!")
show (generic function with 123 methods)

julia> ob
Humbug!

嗯,你应该重载 display():

julia> Base.display(A::Array{Float64, 2}) = println("Humbug")
display (generic function with 11 methods)

julia> X
Humbug

你可以在REPL.jl中找到定义。