Self-Balancing Binary Search Tree for Dart. BST is implemented as Iterable. There are many operations such as greaterThen, lessThenOrEqual (create sublist), max , min etc.
Features
void main() {
final myNumbers = BinaryTree([10, 8, 16, 4, 9, 13, 25, 2, 6, 12, 26, 14, 18]);
}
Binary tree stores values as a binary search tree.
For more information : Binary Search Tree.
A Self-Balancing type tree is used, which balances the depth of the nodes.
For more information : Self Balancing Binary Search Tree
Usage
Use Case
You can see if you need it by looking at the benchmarks given below. It is generally advantageous in keeping long and sorted datasets. Its advantage is not noticeable on short datasets.
Benchmark scenarios
Type
Binary Tree objects must be Comparable
All of num , String , Duration etc. are Comparable.
You can define your objects as Comparable.
void main() {
final myLetters = BinaryTree<String>(["a" , "c", "b"]);
final myDates = BinaryTree<DateTime>([DateTime.now()]);
}
Basic operations
void main() {
final myNumbers = BinaryTree([/*initial*/]);
myNumbers.insert(value);
myNumbers.remove(value);
myNumbers.contains(value);
}
Iterator
You can create an Iterator by “startsWith” or “endsWith” given element.
f(){
final myNumbers = BinaryTree([10, 8, 16, 4, 9, 13, 25, 2, 6, 12, 26, 14, 18]);
final iterator = myNumbers.iteratorFrom(8,greaterThen: true, equal: false); // defaults
while(iterator.moveNext()) {
print(iterator.current); // 9 , 10 ... 26
}
}
You can also define bounds
f(){
final myNumbers = BinaryTree([10, 8, 16, 4, 9, 13, 25, 2, 6, 12, 26, 14, 18]);
final iterator = myNumbers.iteratorFrom(8,bound:Bound(13,equal:true));
while(iterator.moveNext()) {
print(iterator.current); // 9 , 10 ... 13
}
}
toList
You can create new lists using range iterators.
f(){
final myNumbers = BinaryTree([10, 8, 16, 4, 9, 13, 25, 2, 6, 12, 26, 14, 18]);
myNumbers.lessThen(16); /// 14 , 13 , ... 2
myNumbers.lessThenOrEqual(16); /// 16 , 14 , 13 , ... 2
myNumbers.greaterThen(16); /// 25 , 26
myNumbers.greaterThenOrEqual(16); /// 16 , 25 , 26
/// custom bound
myNumbers.listFrom(16,bound:Bound(13,equal:true)); /// 16 , 14 , 13
}
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