Xojo generic object12/16/2023 This is an important differentiation, as otherwise you wouldn’t be able to pass an object around between variables. Something to note, while variables can hold a reference to the instance of an object the variable itself is not the instance. To illustrate, Bob would be an instance of the Human class which would have an Age property. Edit Redux: Your third definition is close I think, but an age as a class is over engineering. I don’t like either possible definition you’ve come up with. I find tying the abstract ideas of OOP to a specific IDE makes things more complicated. For example the template would define a spot for the handle, but whether or not the mug has a handle changes from mug to mug - instance to instance. Instances - mugs - can have different characteristics of the source template’s defined properties. If a class were the blueprint for a coffee mug, the instance would be any individual coffee mug made from the blueprint. As a template, it is not an object.Īn instance is the manifestation of a class template. The manifestation of anything that can be.Ī class is like a template, a mold. It helps to think of these items as real world items.Īn object is literally that. Which one is right, or are both incorrect? When the class for Bob’s age is changed, then it is the object of the class that has changed. When a new variable of the object is created, then the instance of the class is created to make an object. When the program runs then the class is still considered a class. Notes: You use this class as-is to display map information and to manipulate the map contents from your application. Possible Definition 2) A class is created in IDE code. Function: An MKMapView object provides an embeddable map interface, similar to the one provided by the Maps application. When the class for Bob’s age is changed, then it is the instance of the object data that is changed. When a new variable of the object is created, then this is considered an instance of the object. When the program runs then the class is considered an object. Possible Definition 1) A class is created in IDE code. For icons on the project files with version numbers. Our collection of more than 40 plug-ins for Xojo. Includes PDF split and merge, fonts embedding and text extraction. Create, import and modify PDF files on Mac, Windows and Linux. I have heard two common definitions, and which one is right - or is this in subjective to someones view? The award winning Monkeybread Software Xojo plug-ins offer over 79,000 documented functions. In code, the instance of an object is created (?), or is this an instance of a class to create an object? Dim Bob as New Person This is a class and an object(?), or just a class? What is the relationship between a class, object, and instance?Īlthough this seems like a simple question, I have had many ‘interesting’ discussions and am not exactly sure where one starts and another ends.
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