Use optionals when you might have an instance to return from a function, or you might not.
Choose layout from the available 4 options.
Click New and then choose App Page to create one-page app, then click next. Then Click on New Button to create New Lightning App Builder. Navigate to Setup Home->User Interface->Lightning App Builder. You can even write concurrent code with simple, built-in keywords that define asynchronous behavior, making your code more readable and less error-prone. App Page Building a one-page app for the lightning and Salesforce1 app. Memory is managed automatically using tight, deterministic reference counting, keeping memory usage to a minimum without the overhead of garbage collection. To best support international languages and emoji, Strings are Unicode-correct and use a UTF-8 based encoding to optimize performance for a wide-variety of use cases. Inferred types make code cleaner and less prone to mistakes, while modules eliminate headers and provide namespaces. Even better, you don’t even need to type semi-colons.
Named parameters are expressed in a clean syntax that makes APIs in Swift even easier to read and maintain. Swift is the result of the latest research on programming languages, combined with decades of experience building Apple platforms.
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