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About dbCreateHierProp() method

knowledgeseeker

hi

I confused the output of prop of a hierarchical property.

In the lecture note page 1.55. of SKILL Language Programming 6.1.8, it says the prop attribute of a hierarchical property is always nil.

But actually i test the code below, its output is not nil.

code in lecture note
hp = dbCreateHierProp( cv "TrHierProp" )
hp~>a = 1
hp~>b = 2
hp~>prop => nil 
 

It is right that the prop attribute of a hierarchical property is always nil?

Thank you.

Parents

  • This is wrong (it hasn't been updated). In CDB (the old database in IC5141 and before), hierarchical properties always had prop as nil, whereas in OpenAccess, the prop attribute is a list of the properties within the hierarchical property.

    In essence it is the same as hp~>value. The normal way of accessing all the hierarchical properties would be to use hp~>value to see the member properties, which works in CDB and OA, but in OA using hp~>prop works too.

    I'll feed this back to the course developer.

    Regards,

    Andrew

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