Can-binarytree NPM

can-binarytree

can-binarytree extends the very well written Javascript binary tree implementations provided by @vadimg and and mixes in features of CanJS that make the data structures observable.

Note: Currently, the only data structure in the package that is observable is the can.RBTreeList, which was adapted from the can.RBTree data structure for use in CanJS' can-derive plugin.

Install
Use
Data Structures
API
can.RBTreeList
.attr()
.batchSet()
.deleteAttr()
.each()
.eachNode()
.filter()
.indexOf()
.indexOfNode()
.map()
.push()
.removeAttr()
.replace()
.splice()
.unshift()
can.RBTreeList.Node
can.RBTree
can.BinTree
Contributing

Install

Use npm to install can-binarytree:

npm install can-binarytree --save

Use

Use require in Node/Browserify workflows to import can-binarytree like:

var set = require('can-binarytree');

Use define, require or import in StealJS workflows to import can-binarytree like:

import set from 'can-binarytree'

Once you've imported can-binarytree into your project, use it to create observable binary tree data structures. The following example formats and console.log's the current list of values as they are added to a Red-Black Tree List:

var tree = new can.RBTreeList();

tree.bind('add', function () {
    tree.print(function (node) {
        return '<' + node.data + '>';
    });
})

tree.push('Hop');
// <Hop>

tree.push('Skip');
// <Hop>------
// -----<Skip>

tree.push('Jump');
// -----<Skip>------
// <Hop>------<Jump>

Data Structures

RBTreeList - A red-black tree implementation that meets the specifications of a can.List
RBTree - A self-balancing binary tree that serves as a key-value store
BinTree - A binary tree that is not balanced

API

can.RBTreeList

.attr()

rbTreeList.attr() -> Array

Returns an array of all the nodes' data property value in the can.RBTreeList.

rbTreeList.attr(index) -> Object

Returns the data stored on the node in the can.RBTreeList at the specified index.

rbTreeList.attr(index, value) -> can.RBTreeList

Creates a node, sets its data property, and inserts it into the can.RBTreeList at the specified index. If a node already exists at the specified index its data property is overwritten with the specified value.

Returns the can.RBTreeList.

rbTreeList.attr('length') -> can.RBTreeList

Returns the length of the can.RBTreeList.

.batchSet()

rbTreeList.batchSet(array, setFn) -> can.RBTreeList

Populates an empty can.RBTreeList in O(n) time - compared to O(mlogn) time - from an array of values.

The setFn is invoked for each insert with two arguments: (insertIndex, createdNode)

Returns the can.RBTreeList.

.deleteAttr()

rbTreeList.removeAttr(index) -> Object

Removes the node at the specified index without decrementing the indices of of all subsequent items in the RBTreeList by 1. This resulting index will not be iterable with .each() until it is set or removed.

Returns the value of the node's data property that was removed.

.each()

rbTreeList.each(callbackFn) -> can.RBTreeList

Iterates over the nodes in the can.RBTreeList invoking callbackFn for each node's data property. The callbackFn is invoked with two arguments: (value, index). If the callback returns false, the iteration will stop.

.eachNode()

rbTreeList.eachNode(callbackFn) -> can.RBTreeList

Iterates over the nodes in the can.RBTreeList invoking callbackFn for each node. The callbackFn is invoked with two arguments: (node, index). If the callback returns false, the iteration will stop.

.filter()

rbTreeList.filter(predicateFn, context) -> can.RBTreeList

Iterates the elements in the can.RBTreeList returning a new can.RBTreeList instance of all elements prediateFn returns truthy for. The predicateFn is invoked in the specified context with the arguments: (value, index, rbTreeList).

Returns a new can.RBTreeList instance.

.indexOf()

rbTreeList.indexOf(value) -> Number

Returns the first index at which the specified value can be found in the can.RBTreeList, or -1 if it is not present.

.indexOfNode()

rbTreeList.indexOfNode(node, useCache) -> Number

Returns the first index at which the specified node can be found in the can.RBTreeList, or -1 if it is not present.

.map()

rbTreeList.map(mapFn, context) -> can.RBTreeList

Creates an can.RBTreeList of values by running each element in the can.RBTreeList through mapFn. The iteratee is invoked in the specified context with three arguments: (value, index, rbTreeList).

Returns a new can.RBTreeList instance.

.push()

rbTreeList.push(value) -> Number

Inserts the specified value at the end of the can.RBTreeList.

Returns the length of the can.RBTreeList.

.removeAttr()

rbTreeList.removeAttr(index) -> Object

Removes the node at the specified index while decrementing the indices of of all subsequent items in the RBTreeList by 1.

Returns the value of the node's data property that was removed.

.replace()

rbTreeList.replace(newValues) -> can.RBTreeList

Changes the content of a can.RBTreeList by removing all of the existing nodes and inserting new nodes with the values supplied in the newValues array.

Returns the can.RBTreeList.