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Force specialization for _mean's dims argument #38

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May 12, 2020
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3 changes: 2 additions & 1 deletion src/Statistics.jl
Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,8 @@ mean(A::AbstractArray; dims=:) = _mean(identity, A, dims)

_mean_promote(x::T, y::S) where {T,S} = convert(promote_type(T, S), y)

function _mean(f, A::AbstractArray, dims=:)
# ::Dims is there to force specializing on Colon (as it is a Function)
function _mean(f, A::AbstractArray, dims::Dims=:) where Dims
isempty(A) && return sum(f, A, dims=dims)/0
if dims === (:)
n = length(A)
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