Node.js · Theory

push()

Theory

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push()

push() (function) sits in a small live site. Dev’s job is Dev walking through push function. Write that first.

Do push() (function) once by hand. one push function step Dev can write from memory. Change one input. Say the new result out loud.

push() (function) exists so Dev can keep Dev walking through push function correct in a small live site.

push() (function) shows up in a small live site. Name Dev walking through push function, not “a real-world scenario”.

If Dev walking through push function breaks under push() (function), check copy-pasting push function without a dry-run first.

Place push() (function) next to nearby Node.js work — one push function step Dev can write from memory is the link.

Close push() (function) with: “If I skip it, Dev walking through push function goes wrong like this: copy-pasting push function without a dry-run.”

Exam tip

Say push() (function) in one breath, then one push function step Dev can write from memory, then copy-pasting push function without a dry-run.

Example

// push()
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));

push(): find user 2, then list names. Say both prints.

Short notes

Defpush() (function) — Dev uses it for Dev walking through push function in a small live site.
Rulepush() (function) → one push function step Dev can write from memory.
Rememberpush() (function) + npm (a small live site).
Usepush() (function) in a small live site (Dev walking through push function).
Trappush() (function) — copy-pasting push function without a dry-run.
Expush() (function) → Dev walking through push function.

// push() 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));

push()

Example

Short notes

Questions

push()

Example

Short notes

Questions