Menu
I want to create an empty list for a Flutter project.
final prefs = await SharedPreferences.getInstance(); final myStringList = prefs.getStringList('my_string_list_key') ?? <empty list>; I seem to remember there are multiple ways but one recommended way. How do I do it?
857
To create an empty list, use [] for a growable list or List. empty for a fixed length list (or where growability is determined at run-time). The created list is fixed-length if length is provided. The list has length 0 and is growable if length is omitted.
Using addAll() method to add all the elements of another list to the existing list. Creating a new list by adding two or more lists using addAll() method of the list. Creating a new list by adding two or more list using expand() method of the list. Using + operator to combine list.
How to check List is empty or not in Dart Flutter using isEmpty property in dart. isEmpty always return boolean value true or false . - true : return if the list is empty. - false : return if the list is non-empty.
There are a few ways to create an empty list in Dart. If you want a growable list then use an empty list literal like this:
[] Or this if you need to specify the type:
<String>[] Or this if you want a non-growable (fixed-length) list:
List.empty() List() but this is now deprecated. The reason is that List() did not initialize any members, and that isn't compatible with null safe code. Read Understanding null safety: No unnamed List constructor for more.
164
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With