This function works with dictionaries of the type a{s*} (and equally
well with type a{o*}, but we only further discuss the string case
for sake of clarity).
In the event that @dictionary has the type a{sv}, the @expected_type
string specifies what type of value is expected to be inside of the
variant. If the value inside the variant has a different type then
%NULL is returned. In the event that @dictionary has a value type other
than v then @expected_type must directly match the value type and it is
used to unpack the value directly or an error occurs.
In either case, if @key is not found in @dictionary, %NULL is returned.
If the key is found and the value has the correct type, it is
returned. If @expected_type was specified then any non-%NULL return
value will have this type.
This function is currently implemented with a linear scan. If you
plan to do many lookups then #GVariantDict may be more efficient.
Looks up a value in a dictionary #GVariant.
This function works with dictionaries of the type a{s*} (and equally well with type a{o*}, but we only further discuss the string case for sake of clarity).
In the event that @dictionary has the type a{sv}, the @expected_type string specifies what type of value is expected to be inside of the variant. If the value inside the variant has a different type then %NULL is returned. In the event that @dictionary has a value type other than v then @expected_type must directly match the value type and it is used to unpack the value directly or an error occurs.
In either case, if @key is not found in @dictionary, %NULL is returned.
If the key is found and the value has the correct type, it is returned. If @expected_type was specified then any non-%NULL return value will have this type.
This function is currently implemented with a linear scan. If you plan to do many lookups then #GVariantDict may be more efficient.