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pbGraphs.ts

pbGraphs.ts is a graph library for TypeScript.

Requirements

TypeScript 3.4+. The resulting JavaScript 5+ works in browsers, NodeJS and Java's script engine.

Dependencies

There are no dependencies.

Getting Started

It is easy to get started. Simply include the sources in your project. Check out test.ts in the src directory for an example.

Avaialble in 12 different programming languages

pbGraphs-java has been implemented with progsbase, so the library is available for 12 different programming languages.

Try all functions online and see the implementations in different languages.

Functions

Graph Equality

function DirectedGraphsEqual(a : DirectedGraph, b : DirectedGraph) : boolean

Returns true of the two directed graphs are equal.

Graph Components

function GetGraphComponents(g : DirectedGraph, componentMembership : NumberArrayReference) : boolean

Places the list of strongly connected components in componentMembership. Returns false if graphs does not quality as undirected.

Topological Sort

function TopologicalSort(g : DirectedGraph, list : NumberArrayReference) : boolean

Places the topological sort of the graph in list.

Searches

  • Depth-first Search
function DepthFirstSearch(g : DirectedGraph, start : number, list : NumberArrayReference) : void

Places the depth-first sort ordering of the graph in list.

  • Breadth-first Search
function BreadthFirstSearch(g : DirectedGraph, start : number, list : NumberArrayReference) : void

Places the breadth-first sort ordering of the graph in list.

Shortest Paths

  • Dijkstra's Algorithm
function DijkstrasAlgorithm(g : DirectedGraph, src : number, dist : NumberArrayReference, distSet : BooleanArrayReference, prev : NumberArrayReference) : void

Performs Dijkstra's algorithm on the graph g from src. Whether nodes are reachable is placed in distSet, the shortest distances in dist, and the previous node in the shortest paths in prev.

  • Bellman-Ford Algorithm
function BellmanFordAlgorithm(g : DirectedGraph, src : number, dist : NumberArrayReference, distSet : BooleanArrayReference, prev : NumberArrayReference) : boolean

Performs the Bellman-Ford algorithm on the graph g from src. Whether nodes are reachable is placed in distSet, the shortest distances in dist, and the previous node in the shortest paths in prev.

  • Floyd-Warshall Algorithm
function FloydWarshallAlgorithm(g : DirectedGraph, distances : Distances) : boolean

Performs the Floyd-Warshall algorithm on the graph g. The shortest distances between each pair of nodes are placed in distances.

Minimum Spanning Trees

  • Prim's Algorithm
function PrimsAlgorithm(g : DirectedGraph, forest : Forest) : boolean

Performs the Prim's algorithm on the graph g. All minimum spanning trees of the graph are placed in forest. Returns false if graphs does not quality as undirected.

  • Kruskal's Algorithm
function KruskalsAlgorithm(g : DirectedGraph, forest : Forest) : boolean

Performs the Kruskal's algorithm on the graph g. All minimum spanning trees of the graph are placed in forest. Returns false if graphs does not quality as undirected.

Cycles

  • Cycle Detection
function DirectedGraphContainsCycleDFS(g : DirectedGraph) : boolean

Return true if there are cycles in the graph g.

  • Cycle Counting
function DirectedGraphCountCyclesDFS(g : DirectedGraph) : number

Return the number of cycles in the graph g.

  • Get All Cyles
function DirectedGraphGetCyclesDFS(g : DirectedGraph) : Cycle []

Returns the list of cycles in the graph g.