![]() See also: insorted, contains, occursin, issubset. To get a vector indicating whether each value in items is in collection, wrap collection in a tuple or a Ref like this: in.(items, Ref(collection)) or items. ![]() For example, if both arguments are vectors (and the dimensions match), the result is a vector indicating whether each value in collection items is in the value at the corresponding position in collection. ∈ collection, both item and collection are broadcasted over, which is often not what is intended. When broadcasting with in.(items, collection) or items. For the collections mentioned above, the result is always a Bool. To test for the presence of a key in a dictionary, use haskey or k in keys(dict). For example, Sets check whether the item isequal to one of the elements Dicts look for key=>value pairs, and the key is compared using isequal. Some collections follow a slightly different definition. Returns a Bool value, except if item is missing or collection contains missing but not item, in which case missing is returned ( three-valued logic, matching the behavior of any and =).
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