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tree-factory

v3.0.0

Published

Powerful functions for various tree operations.

Downloads

160

Readme

Tree Factory

Powerful functions for various tree operations.

Installation

Using npm

npm install tree-factory
import * as treeFactory from 'tree-factory';
const treeFactory = require('tree-factory');

Using CDN

<script src="https://unpkg.com/tree-factory/dist/index.umd.cjs"></script>

You can find the library on window.treeFactory.

Usage

treeFromList

Create a tree structure data from a flat list.

  • Arguments

    source - The flat list of data to convert into a tree.

    [options] - Customization options.

    [options.id] - The key representing the unique identifier for each node.

    [options.pid] - The key representing the parent identifier for each node.

  • Returns

    The root nodes of the resulting tree structure.

  • Example

    treeFromList([{ id: 0, pid: 1 }, { id: 1 }]);
    treeFromList([{ roleId: 0, parentId: 2 }, { roleId: 2 }], {
      id: 'roleId',
      pid: 'parentId',
    });

treeToList

Pushes all nodes from the provided tree to the specified list or creates a new list.

  • Arguments

    tree - The tree from which to extract nodes.

    [options] - Customization options.

    [options.children] - The key representing children nodes in each tree node.

    [options.list] - The list to which the nodes are pushed.

  • Returns

    The flat list containing all nodes from the tree.

  • Example

    treeToList([{ value: 0, children: [{ value: 1 }] }]);
    treeToList([{ value: 0, subTree: [{ value: 1 }] }], {
      children: 'subTree',
      list: [],
    });

treeCleaner

Removes nodes from the tree that do not satisfy the predicate function.

  • Arguments

    tree - The tree to be cleaned.

    predicate - The function used to determine if a node should be removed.

    [options] - Customization options.

    [options.children] - The key representing children nodes in each tree node.

    [options.parent] - The parent node of the current node being processed.

  • Returns

    The cleaned tree.

  • Example

    treeCleaner(
      [{ value: 0, children: [{ value: 1 }, { value: 2 }] }, { value: 2 }],
      (node, parent) => node.value > 1 && parent,
    );
    treeCleaner(
      [{ value: 0, subTree: [{ value: 1 }, { value: 2 }] }],
      (node) => node.value > 1,
      { children: 'subTree' },
    );

treeTraverse

Executes a provided function once for each node in a tree.

  • Arguments

    tree - The tree to be traversed.

    handle - Function to execute for each node.

    [options] - Customization options.

    [options.children] - The key representing children nodes in each tree node.

    [options.parent] - The parent node of the current node being processed.

    [options.isPreorder] - Specifies whether to use preorder traversal (true) or postorder traversal (false)

  • Returns

    void

  • Example

    treeTraverse(
      [{ value: 0, children: [{ value: 1 }, { value: 2 }] }, { value: 2 }],
      (node, parent) => (node.value += parent.value ?? 0),
    );
    treeTraverse(
      [{ value: 0, subTree: [{ value: 1 }, { value: 2 }] }],
      (node) => node.value++,
      { children: 'subTree', isPreorder: true },
    );

treeFind

Finds the first node in the tree that satisfies the predicate function.

  • Arguments

    tree - The tree to be searched.

    predicate - The function used to determine if a node matches the search criteria.

    [options] - An object containing optional parameters.

    [options.children] - The property name representing the children nodes in each tree node.

    [options.parent] - The parent node of the current node being processed.

  • Returns

    The first node that matches the search criteria, or undefined if no match is found.

  • Example

    treeFind(
      [{ value: 0, children: [{ value: 1 }, { value: 2 }] }, { value: 2 }],
      (node, parent) => node.value > 1 && parent,
    );
    treeFind(
      [{ value: 0, subTree: [{ value: 1 }, { value: 2 }] }],
      (node) => node.value > 1,
      { children: 'subTree' },
    );