Function mapNodes

packages/effect/src/Graph.ts:1864–1876

(
  mutable: MutableGraph<N, E, T>,
  f: (data: N) => N
)

 * @since 3.18.0
 */
export const mapNodes = <N, E, T extends Kind = "directed">(
  mutable: MutableGraph<N, E, T>,
  f: (data: N) => N
): void => {
  assertMutable(mutable)
  const impl = graphImpl(mutable)

  // Transform existing node data in place
  for (const [index, data] of impl.nodes) {
    const newData = f(data)
    impl.nodes.set(index, newData)
  }
}

/**
 * Transforms all edge data in a mutable graph using the provided mapping function.