Node.js · Theory

Timer

Theory

11/723

Timer

Timer is a Node.js topic. In plain words you use it for a short Timer example in a script or API on localhost. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Timer example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Timer.

From the example next to this theory — Timer: find user 2, then list names.

Trap — only saying “Timer” with no example. Fix that before you talk about advanced Node.js.

Viva — what is Timer? Then show the smallest Timer example you can type. Then name the trap.

Exam tip

What is Timer? Show this: the smallest Timer example you can type. Trap: only saying “Timer” with no example.

Example

// Timer
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

Timer: find user 2, then list names. Say both prints.

Short notes

DefTimer — a short Timer example in a script or API on localhost.
Rulethe smallest Timer example you can type
Traponly saying “Timer” with no example
Usea script or API on localhost

Node.js · Theory

Timer

← All stacks

Theory

11/723

Timer

Timer is a Node.js topic. In plain words you use it for a short Timer example in a script or API on localhost. Don’t start with a slogan — start with that picture.

Smallest example: the smallest Timer example you can type. Type it, run it, and say what you see. If you can do that from memory, you know Timer.

From the example next to this theory — Timer: find user 2, then list names.

Trap — only saying “Timer” with no example. Fix that before you talk about advanced Node.js.

Viva — what is Timer? Then show the smallest Timer example you can type. Then name the trap.

Exam tip

What is Timer? Show this: the smallest Timer example you can type. Trap: only saying “Timer” with no example.

Example

// Timer
const users = [
  { id: 1, name: "Asha" },
  { id: 2, name: "Ravi" },
];

function findUser(id) {
  return users.find((u) => u.id === id) ?? null;
}

console.log(findUser(2));
console.log(users.map((u) => u.name));

Timer: find user 2, then list names. Say both prints.

Short notes

DefTimer — a short Timer example in a script or API on localhost.
Rulethe smallest Timer example you can type
Traponly saying “Timer” with no example
Usea script or API on localhost

Timer

Example

Short notes

Questions

Timer

Example

Short notes

Questions