Node.js · Theory

process.finalization.registerBeforeExit(ref, callback) in Node.js

Theory

607/723

process.finalization.registerBeforeExit(ref, callback) in Node.js

process.finalization.registerBeforeExit(ref, callback) (node) is a Node.js topic. In plain words you use it for read notes.txt in a script. Don’t start with a slogan — start with that picture.

Smallest example: (err, data) => …. Type it, run it, and say what you see. If you can do that from memory, you know process.finalization.registerBeforeExit(ref, callback) (node).

From the example next to this theory: process.finalization.registerBeforeExit(ref, callback) in Node.js — async/await sits on Promises — cleaner than nested callbacks..

Trap — callback hell, no error-first. Fix that before you talk about advanced Node.js.

Viva: what is process.finalization.registerBeforeExit(ref, callback) (node)? Then show (err, data) => …. Then name the trap.

Exam tip

What is process.finalization.registerBeforeExit(ref, callback) (node)? Show this: (err, data) => …. Trap: callback hell, no error-first.

Example

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

(async () => {
  console.log("start");
  await wait(50);
  console.log("done");
})();

process.finalization.registerBeforeExit(ref, callback) in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defprocess.finalization.registerBeforeExit(ref, callback) (node) — read notes.txt in a script.
Rule(err, data) => …
Trapcallback hell, no error-first
Usea script

Node.js · Theory

process.finalization.registerBeforeExit(ref, callback) in Node.js

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Theory

607/723

process.finalization.registerBeforeExit(ref, callback) in Node.js

process.finalization.registerBeforeExit(ref, callback) (node) is a Node.js topic. In plain words you use it for read notes.txt in a script. Don’t start with a slogan — start with that picture.

Smallest example: (err, data) => …. Type it, run it, and say what you see. If you can do that from memory, you know process.finalization.registerBeforeExit(ref, callback) (node).

From the example next to this theory: process.finalization.registerBeforeExit(ref, callback) in Node.js — async/await sits on Promises — cleaner than nested callbacks..

Trap — callback hell, no error-first. Fix that before you talk about advanced Node.js.

Viva: what is process.finalization.registerBeforeExit(ref, callback) (node)? Then show (err, data) => …. Then name the trap.

Exam tip

What is process.finalization.registerBeforeExit(ref, callback) (node)? Show this: (err, data) => …. Trap: callback hell, no error-first.

Example

function wait(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

(async () => {
  console.log("start");
  await wait(50);
  console.log("done");
})();

process.finalization.registerBeforeExit(ref, callback) in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defprocess.finalization.registerBeforeExit(ref, callback) (node) — read notes.txt in a script.
Rule(err, data) => …
Trapcallback hell, no error-first
Usea script

process.finalization.registerBeforeExit(ref, callback) in Node.js

Example

Short notes

Questions

process.finalization.registerBeforeExit(ref, callback) in Node.js

Example

Short notes

Questions