# Advanced features

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Creating weak references to objects \<creating_weak_references_to_objects\> Inspecting your application structure from code with Introspection \<inspecting_your_application_structure_from_code_with_introspection\> Looping through your data with For Each \<looping_through_your_data_with_for_each\> Managing raw data with the MemoryBlock class \<managing_raw_data_with_the_memoryblock_class\> Setting default values for Xojo framework class properties \<setting_default_values_for_xojo_framework_class_properties\>

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