how isKey searches keys of an associative map (containers.Map)

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Herbert Triceratops 2021-9-23

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https://ww2.mathworks.cn/matlabcentral/answers/1459469-how-iskey-searches-keys-of-an-associative-map-containers-map

编辑： Herbert Triceratops 2021-9-23

If M is an associative map (containers.Map) and k is a potential key, what exactly happens when I execute isKey(M,k)? It seems that the output of keys(M) is ordered by whatever the "natural" order is for M's particular type of key. Does that mean that isKey does a binary search? Or does isKey do a linear search? Or does isKey do something else? Or does it depend on details that I didn't include here?

Thanks!