Node.js · Theory

Difference between readFile and createReadStream in Node.js

Theory

295/723

Difference between readFile and createReadStream in Node.js

Difference between readFile and createReadStream (in node js) is a Node.js topic. In plain words you use it for read a big CSV in an upload job. Don’t start with a slogan — start with that picture.

Smallest example: createReadStream. Type it, run it, and say what you see. If you can do that from memory, you know Difference between readFile and createReadStream (in node js).

From the example next to this theory — Difference between readFile and createReadStream in Node.

Trap — loading the whole file into RAM. Fix that before you talk about advanced Node.js.

Viva: what is Difference between readFile and createReadStream (in node js)? Then show createReadStream. Then name the trap.

Exam tip

What is Difference between readFile and createReadStream (in node js)? Show this: createReadStream. Trap: loading the whole file into RAM.

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);

Difference between readFile and createReadStream in Node.js — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

DefDifference between readFile and createReadStream (in node js) — read a big CSV in an upload job.
RulecreateReadStream
Traploading the whole file into RAM
Usean upload job

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);

Difference between readFile and createReadStream in Node.js

Example

Short notes

Questions

Difference between readFile and createReadStream in Node.js

Example

Short notes

Questions