Node.js · Theory

Versions

Theory

276/723

Versions

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

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

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

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

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

Exam tip

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

Example

// Versions
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));

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

Short notes

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

Node.js · Theory

Versions

← All stacks

Theory

276/723

Versions

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

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

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

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

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

Exam tip

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

Example

// Versions
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));

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

Short notes

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

Versions

Example

Short notes

Questions

Versions

Example

Short notes

Questions