4
Manipulating Data with Functions and Expressions
In the previous chapter, we learned how to create various types of views so that users can input and view app data using various types of app views. However, any data, be it textual, numerical, or date and time data, needs to be manipulated to match the app’s business functionality. Data manipulation means your app can process the data keyed in by users and convert it into other formats or perform calculations on it as per the required business logic. Finally, the app will present the processed data to the user in the most user-friendly format. This processed data, in turn, will provide the app users with just the right information to make decisions or understand the status of the business functionality ...
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