Simple functional graph implementation in Ramda.js
Using NPM:
npm install ramda-graph
Using Yarn:
yarn install ramda-graph
const R = require('ramda');
const G = require('ramda-graph');
const CITY_GRAPH = R.compose(
// G.appendEdgesMatrix([
// [0, 572, 1600],
// [572, 0, 1108],
// [1600, 1108, 0],
// ]),
// link array of edges
G.appendEdges([
['London', 'Warsaw', 1600],
]),
// link edges
G.appendEdge(
'Berlin', 'London',
1108, // weight only
),
G.appendEdge(
'Warsaw', 'Berlin',
{
weight: 572, // distance
// ... other stuff
},
),
// appends single vertex
G.appendVertex('Kolobrzeg', {nation: 'Poland'}),
// appends to created graph two vertices
G.appendVertices([
{
key: 'Warsaw',
// ... additional vertex data used to e.g. rendering
nation: 'Poland',
},
{
key: 'Berlin',
nation: 'Germany',
},
{
key: 'London',
nation: 'UK',
},
]),
// creates blank Graph object
G.createBlankGraph,
)(true);
// find all linked edges to 'Warsaw' vertex
G.findEdges('Warsaw', CITY_GRAPH);
// find edge between two cities
G.findEdge('Warsaw', 'Berlin', CITY_GRAPH);
// update distance betwen berlin and london
G.updateEdge(
'Berlin', 'London',
{
v1: 'Berlin',
v2: 'London',
weight: 1109
},
CITY_GRAPH
);
// find vertex
G.findVertex('Warsaw', CITY_GRAPH);
console.log(CITY_GRAPH);
/*
* Output:
* {undirected: true, edges: [..], vertices: [..]}
*/The MIT License (MIT)
Copyright (c) 2018 Mateusz Bagiński
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.