Node.js · Theory

Stream writable.writableHighWaterMark Property

Theory

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Stream writable.writableHighWaterMark Property

Stream writable.writableHighWaterMark Property is a Node.js idea you prove with read a big CSV, not with a slogan.

Do Stream writable.writableHighWaterMark Property once by hand. createReadStream. Change one input. Say the new result out loud.

Without Stream writable.writableHighWaterMark Property, an upload job gets messy and read a big CSV is hard to trust.

Stream writable.writableHighWaterMark Property shows up in an upload job. Name read a big CSV, not “a real-world scenario”.

Stream writable.writableHighWaterMark Property miss: loading the whole file into RAM. Fix it before you talk about advanced Node.js.

Place Stream writable.writableHighWaterMark Property next to nearby Node.js work — createReadStream is the link.

Viva for Stream writable.writableHighWaterMark Property: what it is → createReadStream → the mistake (loading the whole file into RAM).

Exam tip

Board: read a big CSV. Dry-run Stream writable.writableHighWaterMark Property. Name the 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);

Stream writable.writableHighWaterMark Property — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

DefStream writable.writableHighWaterMark Property — Rohit uses it for read a big CSV in an upload job.
RuleStream writable.writableHighWaterMark Property → createReadStream.
RememberStream writable.writableHighWaterMark Property + npm (an upload job).
UseStream writable.writableHighWaterMark Property in an upload job (read a big CSV).
TrapStream writable.writableHighWaterMark Property — loading the whole file into RAM.
ExStream writable.writableHighWaterMark Property → read a big CSV.

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);

Stream writable.writableHighWaterMark Property

Example

Short notes

Questions

Stream writable.writableHighWaterMark Property

Example

Short notes

Questions