Node.js · Theory

Create Collection

← All stacks

Theory

46/723

Create Collection

Create Collection is a Node.js idea you prove with Create Collection on Neha's board, not with a slogan.

Keep Create Collection small. Neha should finish Create Collection on Neha's board in a few lines, not a 40-line dump.

Create Collection exists so Neha can keep Create Collection on Neha's board correct in a small live site.

Neha ships Create Collection in a small live site. That is the use case worth saying.

Don’t do this with Create Collection — only reciting the name of Create Collection. Interviewers spot it in ten seconds.

After Create Collection, Neha should still remember only reciting the name of Create Collection.

Viva for Create Collection: what it is → one Create Collection step Neha can write from memory → the mistake (only reciting the name of Create Collection).

Exam tip

Board: Create Collection on Neha's board. Dry-run Create Collection. Name the trap: only reciting the name of Create Collection.

Example

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

Short notes

DefCreate Collection — Neha uses it for Create Collection on Neha's board in a small live site.
RuleCreate Collection → one Create Collection step Neha can write from memory.
RememberCreate Collection + npm (a small live site).
UseCreate Collection in a small live site (Create Collection on Neha's board).
TrapCreate Collection — only reciting the name of Create Collection.
ExCreate Collection → Create Collection on Neha's board.

// Create Collection 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 Collection

Example

Short notes

Questions

Create Collection

Example

Short notes

Questions