fGraph

Functional / TypeScript implementation of Graph with 100% unit test coverage! All methods are pure and the data structures are immutable.

It has build-in functional BFS.

It uses https://github.com/ramda/ramda

Install

$ npm install fgraph --save

Usage with Ramda

import * as R from 'ramda'
import Graph from 'fgraph'
 
const result = R.pipe(
    Graph.newGraph,
    Graph.addVertices([
        { name: 'New York' },
        { name: 'San Francisco' }
    ]),
    Graph.addEdges([
        {
            link: ['New York', 'San Francisco'],
            distance: 2902,
            unit: 'miles'
        }
    ]),
    Graph.BFS('New York')
)();
 
/**
 * returns: 
 * [
 *     { name: 'New York' },
 *     { name: 'San Francisco' }
 * ]
 */

Usage without Ramda

let myGraph = Graph.newGraph();
 
myGraph = addVertices([
    {name: 'New-York'},
    {name: 'San Francisco'}
], myGraph);
 
myGraph = addEdges([
    {
        link: ['New York', 'San Francisco'], 
        distance: 2902, 
        unit: 'miles'
    }
], myGraph);
 
const nodeList = Graph.BFS('New York', myGraph);
 
/**
 * nodeList: 
 * [
 *     { name: 'New York' },
 *     { name: 'San Francisco' }
 * ]
 */

Methods

 Graph
    ✓ newGraph
    ✓ addVertex
    ✓ addVertices
    ✓ addEdge
    ✓ addEdges
    ✓ getVertexHash
    ✓ getEdgeHash
    ✓ hasVertex
    ✓ hasEdge
    ✓ hasVertexByHash
    ✓ hasEdgeByHash
    ✓ getVertexByHash
    ✓ getEdgeByHash
    ✓ getVertices
    ✓ getEdges
    ✓ removeEdgesAssociatedWithVertexHash
    ✓ removeVertexByHash
    ✓ removeEdgeByHash
    ✓ getNeighborVerticesFromVertexHash
    ✓ getNeightborEdgesFromVertexHash
    ✓ BFS

TypeScript Interfaces

interface IEdge {
    link: Array<String>
}
interface IVertex {
    name: String
}
 
interface IGraph {
    vertices: Array<IVertex>,
    edges: Array<IEdge>,
}

Simple Documentation (will update soon)

newGraph :: () -> IGraph

Generates new empty graph

getVertexHash :: IVertex -> String

Hashing function for IVertex. Can be customized.

getEdgeHash :: IEdge -> String

Hashing function for IEdge. Can be customized.

edgeHash :: () -> Array<IVertex>

Hashing function for IVertex. Can be customized.

getEdges :: IGraph -> Array<IEdge>

Returns a list of all edges in a graph

addVertex :: IVertex -> IGraph -> IGraph

Adds Vertex to the graph

addVertices :: Array<IVertex> -> IGraph -> IGraph

Adds multiple Vertices to the graph

getVertexByHash :: String -> IGraph -> IVertex

Return Vertex by Hash

addEdge :: IEdge -> IGraph -> IGraph

Adds edge to the graph

addEdges :: Array<IEdge> -> IGraph -> IGraph

Adds multiple Edges to the graph

getEdgeByHash :: String -> IGraph -> IEdge

Return Edge by Hash

hasVertexByHash :: String -> IGraph -> Boolean

Checks if vertex's hash exists in the graph

hasVertex :: IVertex -> IGraph -> Boolean

Checks if vertex exists in Graph

hasEdgeByHash :: String -> IGraph -> Boolean

Checks if edge's hash exists in the graph

hasEdge :: IEdge -> IGraph -> Boolean

Checks if edge exists in the graph

removeVertexByHash :: String -> IGraph -> IGraph

Removes vertex and all edges associated with it

removeEdgeByHash :: String -> IGraph -> IGraph

Removes edge from graph

getNeightborEdgesFromVertexHash :: String -> IGraph -> Array<IEdge>

Get all neightboring Edges from Vertex by Vertex Hash

getNeighborVerticesFromVertexHash :: String -> IGraph -> Array<IVertex>

Get all neightboring Vertices From Vertex by Vertex hash

BFS :: String -> IGraph -> Array<IVertex>

Breadth First Search with starting node

Contribution

All PRs and feedback is wellcome!

Running unit tests

npm test

Development

npm run dev

Author

Alex Kolarski ([e-mail])

License

(The MIT License)

Copyright (c) 2019 Alex Kolarski <[e-mail]>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.