Node.js · Theory

Create Database

Theory

45/723

Create Database

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

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

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

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

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

Exam tip

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

Example

// Create Database
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));

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

Short notes

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

Node.js · Theory

Create Database

← All stacks

Theory

45/723

Create Database

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

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

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

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

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

Exam tip

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

Example

// Create Database
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));

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

Short notes

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

Create Database

Example

Short notes

Questions

Create Database

Example

Short notes

Questions