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Iterables in Dart Programming
Iterables in Dart are a collection of values, or "elements", that we can access in a sequential manner.
The elements of the iterable are accessed by making use of an iterator getter.
There are multiple collections in Dart that implement the Iterables, for example, LinkedList, List, ListQueue, MapKeySet, MapValueSet and much more.
There are different constructors that we can make use of when we want to create an Iterable, like −
Iterable() - creates an iterable
Iterable.empty() - creates an empty iterable.
Iterable.generate() - creates an iterable which generates its elements dynamically.
Example
Let's consider a few examples of Iterables in Dart.
Consider the example shown below −
void main(){
var map = new Map();
map['apple'] = true;
map['banana'] = true;
map['kiwi'] = false;
for(var fruit in map.keys){
print("the current fruit is : ${fruit}");
}
}Output
the current fruit is : apple the current fruit is : banana the current fruit is : kiwi
Example
Let's take another example, where we have a LinkedHashSet which also implements an Iterable class.
Consider the example shown below −
void main(){
var set = new Set()..add('apple')..add('mango');
for(var fruit in set){
print("fruit : ${fruit}");
}
}Output
fruit : apple fruit : mango
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