Protected _edgesProtected _verticesThe addVertex function adds a new vertex to a graph if it does not already exist.
The parameter "newVertex" is of type V, which represents a vertex in a graph.
The method is returning a boolean value. If the newVertex is already contained in the graph, it will return false. Otherwise, it will add the newVertex to the graph and return true.
BellmanFord time:O(VE) space:O(V)
one to rest pairs
The bellmanFord function implements the Bellman-Ford algorithm to find the shortest path from a source vertex to
all other vertices in a graph, and optionally detects negative cycles and generates the minimum path.
The src parameter is the source vertex from which the Bellman-Ford algorithm will
start calculating the shortest paths. It can be either a vertex object or a vertex ID.
Optional scanNegativeCycle: booleanA boolean flag indicating whether to scan for negative cycles in the graph.
Optional getMin: booleanThe getMin parameter is a boolean flag that determines whether the algorithm should
calculate the minimum distance from the source vertex to all other vertices in the graph. If getMin is set to
true, the algorithm will find the minimum distance and update the min variable with the minimum
Optional genPath: booleanA boolean flag indicating whether to generate paths for all vertices from the source vertex.
The function bellmanFord returns an object with the following properties:
The function checks if there is an edge between two vertices in a graph.
The parameter v1 can be either a VertexId or a V. A VertexId represents the identifier of a vertex in a graph, while V represents the type of the vertex itself.
The parameter v2 represents the second vertex in an edge. It can be either a VertexId
or a V type.
The function containsEdge returns a boolean value. It returns true if there is an edge between the
vertices v1 and v2, and false otherwise.
The function degreeOf returns the degree of a vertex in a graph, which is the number of edges connected to that
vertex.
The parameter vertexOrId can be either a VertexId or a V.
The function degreeOf returns the degree of a vertex in a graph. The degree of a vertex is the number of
edges that are incident to that vertex.
Dijkstra algorithm time: O(logVE) space: O(V + E)
The dijkstra function implements Dijkstra's algorithm to find the shortest path between a source vertex and an
optional destination vertex, and optionally returns the minimum distance, the paths, and other information.
The src parameter represents the source vertex from which the Dijkstra algorithm will
start. It can be either a vertex object or a vertex ID.
Optional dest: null | VertexId | VThe dest parameter is the destination vertex or vertex ID. It specifies the
vertex to which the shortest path is calculated from the source vertex. If no destination is provided, the algorithm
will calculate the shortest paths to all other vertices from the source vertex.
Optional getMinDist: booleanThe getMinDist parameter is a boolean flag that determines whether the minimum
distance from the source vertex to the destination vertex should be calculated and returned in the result. If
getMinDist is set to true, the minDist property in the result will contain the minimum distance
Optional genPaths: booleanThe genPaths parameter is a boolean flag that determines whether or not to generate
paths in the Dijkstra algorithm. If genPaths is set to true, the algorithm will calculate and return the
shortest paths from the source vertex to all other vertices in the graph. If genPaths @returns The function dijkstrareturns an object of typeDijkstraResult
Dijkstra algorithm time: O(VE) space: O(V + E)
The function dijkstraWithoutHeap implements Dijkstra's algorithm to find the shortest path between two vertices in
a graph without using a heap data structure.
The source vertex from which to start the Dijkstra's algorithm. It can be either a vertex object or a vertex ID.
Optional dest: null | VertexId | VThe dest parameter in the dijkstraWithoutHeap function is an optional
parameter that specifies the destination vertex for the Dijkstra algorithm. It can be either a vertex object or its
identifier. If no destination is provided, the value is set to null.
Optional getMinDist: booleanThe getMinDist parameter is a boolean flag that determines whether the minimum
distance from the source vertex to the destination vertex should be calculated and returned in the result. If
getMinDist is set to true, the minDist property in the result will contain the minimum distance
Optional genPaths: booleanThe genPaths parameter is a boolean flag that determines whether or not to generate
paths in the Dijkstra algorithm. If genPaths is set to true, the algorithm will calculate and return the
shortest paths from the source vertex to all other vertices in the graph. If genPaths @returns The function dijkstraWithoutHeapreturns an object of typeDijkstraResult
The function "edgesOf" returns an array of edges connected to a given vertex.
The parameter vertexOrId can be either a VertexId or a V.
an array of edges connected to the specified vertex. If the vertex exists in the graph, the function returns the array of edges connected to that vertex. If the vertex does not exist in the graph, the function returns an empty array.
Floyd algorithm time: O(V^3) space: O(V^2), not support graph with negative weight cycle all pairs The function implements the Floyd-Warshall algorithm to find the shortest path between all pairs of vertices in a graph.
The function floyd() returns an object with two properties: costs and predecessor. The costs
property is a 2D array of numbers representing the shortest path costs between vertices in a graph. The
predecessor property is a 2D array of vertices (or null) representing the predecessor vertices in the shortest
path between vertices in the
The function getAllPathsBetween finds all paths between two vertices in a graph using depth-first search.
The parameter v1 represents either a vertex object (V) or a vertex ID (VertexId).
It is the starting vertex for finding paths.
The parameter v2 represents the destination vertex or its ID. It is the vertex that we
want to find paths to from the starting vertex v1.
an array of arrays of vertices (V[][]). Each inner array represents a path between the given vertices (v1 and v2).
The function getEdge returns the first edge that connects two vertices, or null if no such edge exists.
The parameter v1 represents either a vertex object (V) or a vertex ID
(VertexId). It can also be null.
The parameter v2 represents a vertex or vertex ID. It can be of type V (vertex
object), null, or VertexId (vertex ID).
an edge (E) or null.
The function "getEdgesOf" returns an array of edges connected to a given vertex or vertex ID.
The parameter vertexOrId can accept either a vertex object (V) or a vertex ID
(VertexId).
an array of edges (E[]) that are connected to the specified vertex or vertex ID.
The function "getEndsOfEdge" returns the vertices at the ends of a given edge, or null if the edge does not exist in the graph.
The parameter "edge" is of type E, which represents an edge in a graph.
The function getEndsOfEdge returns an array containing two vertices [V, V] if the edge exists in the
graph and both vertices are found. If the edge does not exist or one or both vertices are not found, it returns
null.
The function getMinCostBetween calculates the minimum cost between two vertices in a graph, either based on edge
weights or using a breadth-first search algorithm.
The parameter v1 represents the starting vertex or vertex ID of the graph.
The parameter v2 represents the second vertex in the graph. It can be either a vertex
object or a vertex ID.
Optional isWeight: booleanisWeight is an optional parameter that indicates whether the graph edges have weights. If isWeight is set to true, the function will calculate the minimum cost between v1 and v2 based on the weights of the edges. If isWeight is set to false or not provided, the function will calculate the
The function getMinCostBetween returns a number representing the minimum cost between two vertices (v1
and v2) in a graph. If the isWeight parameter is true, it calculates the minimum weight between the vertices.
If isWeight is false or not provided, it calculates the minimum number of edges between the vertices. If the
vertices are not
The function getMinPathBetween returns the minimum path between two vertices in a graph, either based on weight or
using a breadth-first search algorithm.
The parameter v1 represents the starting vertex or its ID.
The parameter v2 represents the destination vertex or its ID. It is the vertex that we
want to find the minimum path to from the source vertex v1.
Optional isWeight: booleanA boolean flag indicating whether to consider the weight of edges in finding the minimum path. If set to true, the function will use Dijkstra's algorithm to find the minimum weighted path. If set to false, the function will use breadth-first search (BFS) to find the minimum path. If
The function getMinPathBetween returns an array of vertices (V[]) representing the minimum path between
two vertices (v1 and v2). If no path is found, it returns null.
The function getVertex returns the vertex object associated with a given vertex ID or vertex object, or null if it
does not exist.
The parameter vertexOrId can be either a VertexId or a V.
The function getVertex returns the vertex object (V) corresponding to the given vertexOrId parameter.
If the vertex is found in the _vertices map, it is returned. Otherwise, null is returned.
The function getVertexId returns the id of a vertex, whether it is passed as an instance of AbstractVertex or as
a VertexId.
The parameter vertexOrId can be either a vertex object (V) or a vertex ID
(VertexId).
the id of the vertex.
The function removes all vertices from a graph and returns a boolean indicating if any vertices were removed.
The vertices parameter can be either an array of vertices (V[]) or an array
of vertex IDs (VertexId[]).
a boolean value. It returns true if at least one vertex was successfully removed, and false if no vertices were removed.
The removeEdge function removes an edge between two vertices in a graph.
The parameter "edge" is of type E, which represents an edge in a graph.
The method is returning either the removed edge (of type E) or null if the edge was not found.
The function removes an edge between two vertices in a graph and returns the removed edge, or null if either of the vertices does not exist.
The parameter v1 represents either a vertex object (V) or a vertex ID (VertexId).
V | VertexId: The second vertex or vertex ID of the edge to be removed.
the removed edge (E) if it exists, or null if either of the vertices (v1 or v2) does not exist.
The removeVertex function removes a vertex from a graph by its ID or by the vertex object itself.
The parameter vertexOrId can be either a vertex object (V) or a vertex ID
(VertexId).
The method removeVertex returns a boolean value.
The function sets the weight of an edge between two vertices in a graph.
The srcOrId parameter can be either a VertexId or a V object. It represents
the source vertex of the edge.
The destOrId parameter represents the destination vertex of the edge. It can be
either a VertexId or a vertex object V.
The weight parameter represents the weight of the edge between the source vertex (srcOrId) and the destination vertex (destOrId).
a boolean value. If the edge exists between the source and destination vertices, the function will update the weight of the edge and return true. If the edge does not exist, the function will return false.
Tarjan is an algorithm based on DFS,which is used to solve the connectivity problem of graphs.
Tarjan can find cycles in directed or undirected graph
Tarjan can find the articulation points and bridges(critical edges) of undirected graphs in linear time,
Tarjan solve the bi-connected components of undirected graphs;
Tarjan can find the SSC(strongly connected components), articulation points, and bridges of directed graphs.
The tarjan function is used to perform various graph analysis tasks such as finding articulation points, bridges,
strongly connected components (SCCs), and cycles in a graph.
Optional needArticulationPoints: booleanA boolean value indicating whether or not to calculate and return the articulation points in the graph. Articulation points are the vertices in a graph whose removal would increase the number of connected components in the graph.
Optional needBridges: booleanA boolean flag indicating whether the algorithm should find and return the bridges (edges whose removal would increase the number of connected components in the graph).
Optional needSCCs: booleanA boolean value indicating whether the Strongly Connected Components (SCCs) of the graph are needed. If set to true, the function will calculate and return the SCCs of the graph. If set to false, the SCCs will not be calculated or returned.
Optional needCycles: booleanA boolean flag indicating whether the algorithm should find cycles in the graph. If set to true, the algorithm will return a map of cycles, where the keys are the low values of the SCCs and the values are arrays of vertices that form cycles within the SCCs.
The function tarjan returns an object with the following properties:
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The function adds an edge to a graph by connecting two vertices.