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→map:keys
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| '''Summary'''
|Returns a sequence containing all the key values present in a map. The function takes any ''map'' as its {{Code|$input}} argument and returns the keys that are present in the map as a sequence of atomic values. The order may differ from the order in which entries were inserted in the map.
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| '''Examples'''
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* <code>map:keys(map{ 1: "yes", 2: "no" })</code> returns some permutation of {{Code|(1,2)}}.
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