Node.js · Theory

MongoDB Select

Theory

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MongoDB Select

Don’t start MongoDB Select with jargon. Start with Farhan walking through MongoDB Select. That is the whole point.

Keep MongoDB Select small. Farhan should finish Farhan walking through MongoDB Select in a few lines, not a 40-line dump.

Skip MongoDB Select and copy-pasting MongoDB Select without a dry-run shows up in lab hour.

Farhan ships MongoDB Select in lab hour. That is the use case worth saying.

If Farhan walking through MongoDB Select breaks under MongoDB Select, check copy-pasting MongoDB Select without a dry-run first.

Place MongoDB Select next to nearby Node.js work — one MongoDB Select step Farhan can write from memory is the link.

Close MongoDB Select with: “If I skip it, Farhan walking through MongoDB Select goes wrong like this: copy-pasting MongoDB Select without a dry-run.”

Exam tip

Say MongoDB Select in one breath, then one MongoDB Select step Farhan can write from memory, then copy-pasting MongoDB Select without a dry-run.

Example

// MongoDB Select
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));

MongoDB Select: find user 2, then list names. Say both prints.

Short notes

DefMongoDB Select — Farhan uses it for Farhan walking through MongoDB Select in lab hour.
RuleMongoDB Select → one MongoDB Select step Farhan can write from memory.
RememberMongoDB Select + the event loop (lab hour).
UseMongoDB Select in lab hour (Farhan walking through MongoDB Select).
TrapMongoDB Select — copy-pasting MongoDB Select without a dry-run.
ExMongoDB Select → Farhan walking through MongoDB Select.

// MongoDB Select 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));

MongoDB Select

Example

Short notes

Questions

MongoDB Select

Example

Short notes

Questions