Node.js · Theory

Query String

Theory

25/723

Query String

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

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

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

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

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

Exam tip

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

Example

// Query String
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));

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

Short notes

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

Node.js · Theory

Query String

← All stacks

Theory

25/723

Query String

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

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

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

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

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

Exam tip

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

Example

// Query String
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));

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

Short notes

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

Query String

Example

Short notes

Questions

Query String

Example

Short notes

Questions