Node.js · Theory

This Binding

Theory

683/723

This Binding

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

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

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

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

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

Exam tip

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

Example

// This Binding
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));

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

Short notes

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

Node.js · Theory

This Binding

← All stacks

Theory

683/723

This Binding

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

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

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

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

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

Exam tip

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

Example

// This Binding
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));

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

Short notes

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

This Binding

Example

Short notes

Questions

This Binding

Example

Short notes

Questions