Node.js · Theory

Control Flow

Theory

719/723

Control Flow

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

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

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

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

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

Exam tip

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

Example

// Control Flow
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));

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

Short notes

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

Node.js · Theory

Control Flow

← All stacks

Theory

719/723

Control Flow

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

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

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

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

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

Exam tip

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

Example

// Control Flow
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));

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

Short notes

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

Control Flow

Example

Short notes

Questions

Control Flow

Example

Short notes

Questions