keys - return an array of the keys from the (key, value) pairs in a mapping

array keys( mapping m );

keys() returns an array of keys (indices) corresponding to the keys in the (key, value) pairs stored in the mapping m.

For example, if:

mapping m;
m = (["hp" : 35, "sp" : 42, "mass" : 100]);

then

keys(m) == ({"hp", "sp", "mass"})

Note: the keys will not be returned in any apparent order. However, they will be returned in the same order as the corresponding values (returned by the values() efun).

See also: values