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Node.js · Theory

fs.fdatasyncSync() Method

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Theory

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fs.fdatasyncSync() Method

Don’t start fs.fdatasyncSync() Method with jargon. Start with fetch a user then marks. That is the whole point.

Keep fs.fdatasyncSync() Method small. Rohit should finish fetch a user then marks in a few lines, not a 40-line dump.

fs.fdatasyncSync() Method exists so Rohit can keep fetch a user then marks correct in an API handler.

fs.fdatasyncSync() Method shows up in an API handler. Name fetch a user then marks, not “a real-world scenario”.

fs.fdatasyncSync() Method trap — unhandled rejection. Rohit loses marks for that every viva.

fs.fdatasyncSync() Method is not a lonely heading. Rohit ties it to fetch a user then marks.

Close fs.fdatasyncSync() Method with: “If I skip it, fetch a user then marks goes wrong like this: unhandled rejection.”

Exam tip

Say fs.fdatasyncSync() Method in one breath, then async function + try/catch, then unhandled rejection.

Example

const fs = require("fs");
const path = require("path");

const file = path.join(__dirname || ".", "demo.txt");
fs.writeFileSync(file, "hello node\n");
const text = fs.readFileSync(file, "utf8");
console.log(text.trim());
fs.unlinkSync(file);

fs.fdatasyncSync() Method — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

  • Deffs.fdatasyncSync() Method — Rohit uses it for fetch a user then marks in an API handler.
  • Rulefs.fdatasyncSync() Method → async function + try/catch.
  • Rememberfs.fdatasyncSync() Method + npm (an API handler).
  • Usefs.fdatasyncSync() Method in an API handler (fetch a user then marks).
  • Trapfs.fdatasyncSync() Method — unhandled rejection.
  • Exfs.fdatasyncSync() Method → fetch a user then marks.

Questions

1

In one breath: what does fs.fdatasyncSync() Method do for Rohit?

2

If you skip fs.fdatasyncSync() Method, what breaks in an API handler?

3

Which mistake makes fetch a user then marks fail?

4

Show fs.fdatasyncSync() Method in npm terms — three lines max.

Previous← ecdh.computeSecret() MethodNextfs.lchown() Method →
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