variable / @typed/fx/RefGraph

hasEdge

Check if an edge exists.

Package version
2.0.0-beta.13
Category
State predicates
Since
1.18.0

Import

import { hasEdge } from "@typed/fx/RefGraph";

Signatures

export declare const hasEdge: {
    (source: Graph.NodeIndex, target: Graph.NodeIndex): <N, E, T extends Graph.Kind, Err, R>(ref: RefGraph<N, E, T, Err, R>) => RefSubject.Computed<boolean, Err, R>;
    <N, E, T extends Graph.Kind, Err, R>(ref: RefGraph<N, E, T, Err, R>, source: Graph.NodeIndex, target: Graph.NodeIndex): RefSubject.Computed<boolean, Err, R>;
};

Why

Makes has edge a live projection of the graph; consumers can sample it now or observe it without copying the source state.

Ownership and lifetime

The has edge view retains no independent state. An Effect read samples the source once; Fx observation follows later pushes and its observing Scope owns subscription cleanup.

Other public imports

These import paths expose the same declaration. Each page retains its own public name and signature.

Source