Tweaks of sum functions #7013
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Tweaks of sum functions #7013
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Introduce subzero, add zero, etc to enhance consistency & efficiency.
| addzero(x::SumResultNumber) = x | ||
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| sumzero{T<:AbstractArray}(::Type{T}) = error("Summing over an empty collection of arrays is not allowed.") | ||
| addzero{T<:AbstractArray}(a::Type{T}) = a |
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Shouldn't this be:
addzero(a::AbstractArray) = a
?
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We might want to use some of this in #6994 too. |
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Some internal refactoring. To make handling of summing over empty array or singleton arrays consistent (and more efficient for when the elements are commonly used types).