Dart list of strings
Dart Programming - ListsAdvertisements Previous Page Next Page A very commonly used collection in programming is an array. Dart represents arrays in the form of List objects. A List is simply an ordered group of objects. The dart:core library provides the List class that enables creation and manipulation of lists. Show The logical representation of a list in Dart is given below
Lists can be classified as
Let us now discuss these two types of lists in detail. Fixed Length ListA fixed length lists length cannot change at runtime. The syntax for creating a fixed length list is as given below Step 1 Declaring a list The syntax for declaring a fixed length list is given below The above syntax creates a list of the specified size. The list cannot grow or shrink at runtime. Any attempt to resize the list will result in an exception. Step 2 Initializing a list The syntax for initializing a list is as given below lst_name[index] = value;ExampleLive Demovoid main() { var lst = new List(3); lst[0] = 12; lst[1] = 13; lst[2] = 11; print(lst); }It will produce the following output [12, 13, 11]Growable ListA growable lists length can change at run-time. The syntax for declaring and initializing a growable list is as given below Step 1 Declaring a List var list_name = [val1,val2,val3] --- creates a list containing the specified values OR var list_name = new List() --- creates a list of size zeroStep 2 Initializing a List The index / subscript is used to reference the element that should be populated with a value. The syntax for initializing a list is as given below list_name[index] = value;ExampleThe following example shows how to create a list of 3 elements. Live Demovoid main() { var num_list = [1,2,3]; print(num_list); }It will produce the following output ExampleThe following example creates a zero-length list using the empty List() constructor. The add() function in the List class is used to dynamically add elements to the list. Live Demovoid main() { var lst = new List(); lst.add(12); lst.add(13); print(lst); }It will produce the following output [12, 13]List PropertiesThe following table lists some commonly used properties of the List class in the dart:core library.
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