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Fix minimum and maximum in the presence of missing values #35989

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merged 2 commits into from
Jun 8, 2020
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nalimilan
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Another, possibly cleaner way of fixing this would be to add an isnan(::Number) = false fallback, and do x isa Number && isnan(x). That would make the code a bit clearer and could be useful for others. Currently we would have to do x isa Union{Real, Complex} && isnan(x) since there are the only types for which we define isnan methods -- but that approach wouldn't work for custom complex types.

Similar to #35323 (but simpler to fix).

@nalimilan nalimilan added the domain:missing data Base.missing and related functionality label May 22, 2020
base/reduce.jl Outdated
v2 == v2 || return v2
v3 == v3 || return v3
v4 == v4 || return v4
# === true is there to ignore missing
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"ignore" isn't the right term actually since we short-circuit. I can change this to just add "or missing" to the existing comment for NaN.

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Just say something like "to handle missing"

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Actually "short-circuit" is even more accurate I think.

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LGTM

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3 participants