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by= parameter for findmax #46932

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jariji opened this issue Sep 27, 2022 · 1 comment
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by= parameter for findmax #46932

jariji opened this issue Sep 27, 2022 · 1 comment

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@jariji
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jariji commented Sep 27, 2022 •
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For example, if f might return nothing, I can call findmax(f, xs; by=x->isnothing(x) ? -Inf : x) to get the maximum value and its index in one pass while treating the nothing values as -Inf for the purpose of comparison.

passnothing(f) = x->isnothing(x) ? nothing : f(x)
findmax(passnothing(abs), [-2., -4., nothing]; by=x->isnothing(x) ? -Inf : x) == (4., 2)
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jariji commented Oct 3, 2022

#28210

@jariji jariji closed this as completed Oct 3, 2022
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