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This video introduces an advanced topic that is completely optional and will not appear on any exam. Classes like RGB and Point3 appear to enforce their invariants without any getters and setters.…
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Instructional Recordings Creation Date
November 07, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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As we saw in the previous video, we cannot trust == if we need to test if two variables refer to the same object folder. In this video we show an alternative operator is, which is safe to use because…
Content Categories
Instructional Recordings Creation Date
November 07, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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In this video we show that thte primary purpose of the super function is in the initializer method of the subclass. That is because we cannot guarantee that all of the attributes for the parent class…
Content Categories
Instructional Recordings Creation Date
November 07, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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Getters and setters have another advantage in that they allow us to completely disable to any changes to an attribute. This allows us to separate attributes into mutable and immutable attributes,…
Content Categories
Instructional Recordings Creation Date
October 29, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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In this previous video we introduced the concept of getters and setters. But how do we force the user to use these when the attribute is so much simpler. In this video we talk about the concept of…
Content Categories
Instructional Recordings Creation Date
October 29, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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We know how to enforce preconditions, but how do we force invariants for our attributes? As we see in this video, we do it much the same as for preconditions. But that is because we are going to…
Content Categories
Instructional Recordings Creation Date
October 29, 2020 Creator 1 First Name
Walker Creator 1 Last Name
White Creator 1 Role
Faculty or Staff Member Creator 1 NetID
wmw2 Language
English Searchable
Yes Searchable On
Cornell Web Search
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