Native Shopify Mobile App with 20 new features
Kickstart your hyperlocal marketplace in Corona pandemic with a starter guide
Android App Development
iOS App Development
Cross Platform App Development
Hire on-demand project developers and turn your idea into working reality.
Big thanks to Webkul and his team for helping get Opencart 18.104.22.168 release ready!
Owner and Founder. Opencart
As we can understand by its name “Optional” that means It may or may not have some value. it is the process to call the methods and structure if it has some value it returns some value if not it return nil, it is Optional Chaining.
If you are using optional chaining then you need to specify it as in the below
you are using Forced Unwrapping then it must have some value else this code generate always error
Once you determine the type does contain optional values, you can add an optional name behind an exclamation point (!) To get the value. The exclamation point said, “I know that there are optional values, use it.” This is called mandatory optional parsed value (forced unwrapping).
if you want to use option chaining you need to use a question mark at the place exclamation mark like below
If the name not any value it will return nil but it doesn’t generate any error at the run time.
You can access the properties of other classes, structures, etc by making their object. like below
You can call a method like below
The whole point to get an unwrapped copy of the original object that you can use safely, even if your original object could be modified by other threads as well. So don’t discard the safely unwrapped value, use that value later on instead of doing optional chaining on the optional value.
I hope this blog helped, If you have any query please leave a comment to us and for more blogs please click here.
Your email address will not be published. Required fields are marked*
Save my name email and website in this browser for the next time I comment.
Be the first to comment.
Enquiry or Requirement
If you have more details or questions, you can reply to the received confirmation email.