Node.js · Theory

response.getHeaderNames() Method

Theory

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response.getHeaderNames() Method

Don’t start response.getHeaderNames() Method with jargon. Start with Rohit walking through response.getHeaderNames Method. That is the whole point.

Do response.getHeaderNames() Method once by hand. one response.getHeaderNames Method step Rohit can write from memory. Change one input. Say the new result out loud.

response.getHeaderNames() Method exists so Rohit can keep Rohit walking through response.getHeaderNames Method correct in lab hour.

response.getHeaderNames() Method shows up in lab hour. Name Rohit walking through response.getHeaderNames Method, not “a real-world scenario”.

response.getHeaderNames() Method miss: skipping the failure case for response.getHeaderNames Method. Fix it before you talk about advanced Node.js.

After response.getHeaderNames() Method, Rohit should still remember skipping the failure case for response.getHeaderNames Method.

One breath for response.getHeaderNames() Method, then Rohit walking through response.getHeaderNames Method, then skipping the failure case for response.getHeaderNames Method. Sit down.

Exam tip

Board: Rohit walking through response.getHeaderNames Method. Dry-run response.getHeaderNames() Method. Name the trap: skipping the failure case for response.getHeaderNames Method.

Example

const http = require("http");

const server = http.createServer((req, res) => {
  res.writeHead(200, { "Content-Type": "application/json" });
  res.end(JSON.stringify({ ok: true, path: req.url }));
});

// server.listen(3000);
console.log("handler ready for", "/api/health");
console.log(JSON.stringify({ ok: true, path: "/api/health" }));

response.getHeaderNames() Method — http.createServer handles each request with (req, res). Express sits on top of this.

Short notes

Defresponse.getHeaderNames() Method — Rohit uses it for Rohit walking through response.getHeaderNames Method in lab hour.
Ruleresponse.getHeaderNames() Method → one response.getHeaderNames Method step Rohit can write from memory.
Rememberresponse.getHeaderNames() Method + the event loop (lab hour).
Useresponse.getHeaderNames() Method in lab hour (Rohit walking through response.getHeaderNames Method).
Trapresponse.getHeaderNames() Method — skipping the failure case for response.getHeaderNames Method.
Exresponse.getHeaderNames() Method → Rohit walking through response.getHeaderNames Method.

const http = require("http"); const server = http.createServer((req, res) => { res.writeHead(200, { "Content-Type": "application/json" }); res.end(JSON.stringify({ ok: true, path: req.url })); }); // server.listen(3000); console.log("handler ready for", "/api/health"); console.log(JSON.stringify({ ok: true, path: "/api/health" }));

response.getHeaderNames() Method

Example

Short notes

Questions

response.getHeaderNames() Method

Example

Short notes

Questions