Node.js · Theory

dns.resolveSrv(hostname, callback) function in Node.js

Theory

526/723

dns.resolveSrv(hostname, callback) function in Node.js

dns.resolveSrv(hostname, callback) function (in node js) 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 dns.resolveSrv(hostname, callback) function (in node js).

From the example next to this theory: dns.resolveSrv(hostname, callback) function 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 dns.resolveSrv(hostname, callback) function (in node js)? Then show (err, data) => …. Then name the trap.

Exam tip

What is dns.resolveSrv(hostname, callback) function (in node js)? 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");
})();

dns.resolveSrv(hostname, callback) function in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defdns.resolveSrv(hostname, callback) function (in node js) — read notes.txt in a script.
Rule(err, data) => …
Trapcallback hell, no error-first
Usea script

Node.js · Theory

dns.resolveSrv(hostname, callback) function in Node.js

← All stacks

Theory

526/723

dns.resolveSrv(hostname, callback) function in Node.js

dns.resolveSrv(hostname, callback) function (in node js) 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 dns.resolveSrv(hostname, callback) function (in node js).

From the example next to this theory: dns.resolveSrv(hostname, callback) function 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 dns.resolveSrv(hostname, callback) function (in node js)? Then show (err, data) => …. Then name the trap.

Exam tip

What is dns.resolveSrv(hostname, callback) function (in node js)? 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");
})();

dns.resolveSrv(hostname, callback) function in Node.js — async/await sits on Promises — cleaner than nested callbacks.

Short notes

Defdns.resolveSrv(hostname, callback) function (in node js) — read notes.txt in a script.
Rule(err, data) => …
Trapcallback hell, no error-first
Usea script

dns.resolveSrv(hostname, callback) function in Node.js

Example

Short notes

Questions

dns.resolveSrv(hostname, callback) function in Node.js

Example

Short notes

Questions