How do I remove a dynamic property from a class?
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I have a class "A" that has a property called "Sigs" of class "B". Class "B" inherits from "dynamicprops" and the constructor for "A" populates "Sigs" with a bunch of dynamic properties that are of class "C". I want to be able to delete those properties from "Sigs". How do I do that?
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MathWorks Support Team
2018-4-23
In order to remove a dynamic property, save the "meta.DynamicProperty" object that is returned by "addprop" and then use the "delete" function of that object.
In order to save the "meta.DynamicProperty" objects, create a struct "sig_meta" that maps from the property name to the "meta.DynamicProperty" object. This was a property of the "A" class.
If you want to hide the "sig_meta" from the property list of your "A" class, use "Hidden=true". This allows you to still use the property, but it will not clutter your Command Window outputs.
Finally, in order to delete the dynamic property, use "delete" on the field of the struct "sig_meta" in your "A" class. Then, call "rmfield" to keep the struct and the "B" class properties in sync.
An example is attached.
To play with this example, execute
>> obj = A;
>> obj.Sigs
>> obj.sig_meta
>> delete(obj.sig_meta.prop10);
>> obj.Sigs
>> obj.sig_meta
>> obj.sig_meta = rmfield(obj.sig_meta,'prop10')
>> obj.sig_meta;
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2018-4-23
2018-4-23
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