What are Swift properties?
Properties associate values with a particular class, structure, or enumeration. Stored properties store constant and variable values as part of an instance, while computed properties compute (rather than store) a value. Computed properties are provided by classes, structures, and enumerations.
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What is Swift property bag?
Property wrappers were introduced in Swift 5.1 to eliminate boilerplate code, facilitate code reuse, and enable more expressive APIs. Property wrappers eliminate boilerplate code and allow developers to write code that is more readable and more expressive.
What is setter and getter in Swift?
To create computed properties, Swift gives you a getter and (optional) setter method to work with. A getter method is used to perform a calculation when requested. A setter method is an optional method. Can be used to modify a related property.
Why is Swift lazy?
Lazy variables allow you to delay the initialization of stored properties. This can be useful for getting expensive jobs done only when they are really needed. The difference between lazy and calculated properties is important in cases where you need to have calculations based on the current state of the values.
Why do we use optionals in Swift?
Optionals are at the core of Swift and have existed since the first version of Swift. An optional value allows us to write clean code while taking care of possible null values. If you’re new to Swift, you may need to get used to the syntax of adding a question mark to properties.
Is swift static thread safe?
Static variables in Swift are not thread-safe by default.
What are optional values in Swift?
Swift also introduces optional types, which handle the absence of a value. Optionals say “there is a value y is equal to x” or “there is no value”. Optionals are similar to using nil with pointers in Objective-C, but they work for any type, not just classes.