effect-io-ai

Package: effect
Module: Graph

Graph.hasNode

Checks whether a node with the given index exists in the graph.

Example (Checking node existence)

import { Graph } from "effect"

const graph = Graph.mutate(Graph.directed<string, number>(), (mutable) => {
  Graph.addNode(mutable, "Node A")
})

const nodeIndex = 0
const exists = Graph.hasNode(graph, nodeIndex)
console.log(exists) // true

const nonExistentIndex = 999
const notExists = Graph.hasNode(graph, nonExistentIndex)
console.log(notExists) // false

Signature

declare const hasNode: { (nodeIndex: NodeIndex): <N, E, T extends Kind = "directed">(graph: Graph<N, E, T> | MutableGraph<N, E, T>) => boolean; <N, E, T extends Kind = "directed">(graph: Graph<N, E, T> | MutableGraph<N, E, T>, nodeIndex: NodeIndex): boolean; }

Source

Since v3.18.0