Node.js · Theory

http2session.ping([payload, ]callback) function in Node.js

Theory

472/723

http2session.ping([payload, ]callback) function in Node.js

If you can teach http2session.ping([payload, ]callback) function (node js) using read notes.txt, you know it. If you only know the heading, you don’t.

For http2session.ping([payload, ]callback) function (node js), the event loop is in play. Don’t blame it until you have traced read notes.txt.

Skip http2session.ping([payload, ]callback) function (node js) and callback hell, no error-first shows up in a script.

http2session.ping([payload, ]callback) function (node js) shows up in a script. Name read notes.txt, not “a real-world scenario”.

http2session.ping([payload, ]callback) function (node js) trap: callback hell, no error-first. Asha loses marks for that every viva.

http2session.ping([payload, ]callback) function (node js) is not a lonely heading. Asha ties it to read notes.txt.

Viva for http2session.ping([payload, ]callback) function (node js): what it is → (err, data) => … → the mistake (callback hell, no error-first).

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

Board: read notes.txt. Dry-run http2session.ping([payload, ]callback) function (node js). Name the 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");
})();

http2session.ping([payload, ]callback) function in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defhttp2session.ping([payload, ]callback) function (node js) — Asha uses it for read notes.txt in a script.
Rulehttp2session.ping([payload, ]callback) function (node js) → (err, data) => ….
Rememberhttp2session.ping([payload, ]callback) function (node js) + the event loop (a script).
Usehttp2session.ping([payload, ]callback) function (node js) in a script (read notes.txt).
Traphttp2session.ping([payload, ]callback) function (node js) — callback hell, no error-first.
Exhttp2session.ping([payload, ]callback) function (node js) → read notes.txt.

Node.js · Theory

http2session.ping([payload, ]callback) function in Node.js

← All stacks

Theory

472/723

http2session.ping([payload, ]callback) function in Node.js

If you can teach http2session.ping([payload, ]callback) function (node js) using read notes.txt, you know it. If you only know the heading, you don’t.

For http2session.ping([payload, ]callback) function (node js), the event loop is in play. Don’t blame it until you have traced read notes.txt.

Skip http2session.ping([payload, ]callback) function (node js) and callback hell, no error-first shows up in a script.

http2session.ping([payload, ]callback) function (node js) shows up in a script. Name read notes.txt, not “a real-world scenario”.

http2session.ping([payload, ]callback) function (node js) trap: callback hell, no error-first. Asha loses marks for that every viva.

http2session.ping([payload, ]callback) function (node js) is not a lonely heading. Asha ties it to read notes.txt.

Viva for http2session.ping([payload, ]callback) function (node js): what it is → (err, data) => … → the mistake (callback hell, no error-first).

Diagram

  request
      │
      ▼
  event loop
      │ I/O done
      ▼
  response

Exam tip

Board: read notes.txt. Dry-run http2session.ping([payload, ]callback) function (node js). Name the 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");
})();

http2session.ping([payload, ]callback) function in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defhttp2session.ping([payload, ]callback) function (node js) — Asha uses it for read notes.txt in a script.
Rulehttp2session.ping([payload, ]callback) function (node js) → (err, data) => ….
Rememberhttp2session.ping([payload, ]callback) function (node js) + the event loop (a script).
Usehttp2session.ping([payload, ]callback) function (node js) in a script (read notes.txt).
Traphttp2session.ping([payload, ]callback) function (node js) — callback hell, no error-first.
Exhttp2session.ping([payload, ]callback) function (node js) → read notes.txt.

http2session.ping([payload, ]callback) function in Node.js

Example

Short notes

Questions

http2session.ping([payload, ]callback) function in Node.js

Example

Short notes

Questions