考虑这个非常现实问题的玩具版本:
julia> foo(a,b) = sum(a) + b
foo (generic function with 1 method)
julia> foo.([1,2],[3,4,5])
ERROR: DimensionMismatch("arrays could not be broadcast to a common size")
Stacktrace:
[1] _bcs1(::Base.OneTo{Int64}, ::Base.OneTo{Int64}) at ./broadcast.jl:70
[2] _bcs at ./broadcast.jl:63 [inlined]
[3] broadcast_shape at ./broadcast.jl:57 [inlined] (repeats 2 times)
[4] broadcast_indices at ./broadcast.jl:53 [inlined]
[5] broadcast_c at ./broadcast.jl:311 [inlined]
[6] broadcast(::Function, ::Array{Int64,1}, ::Array{Int64,1}) at ./broadcast.jl:434
我希望上面的代码返回
[6,7,8] ，但这不会发生，因为 broadcast点所暗示的尝试匹配长度为 2 和 3 的输入向量，并将标量输入 foo 的两个参数中.我怎样才能避免这种情况？
最佳答案
只需将您不想广播的参数包装成 Ref :
julia> foo.(Ref([1,2]),[3,4,5])
3-element Array{Int64,1}:
6
7
8
关于julia - 避免在 Julia 中广播争论，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47346301/