Node.js · Theory

Stream writable.writableObjectMode Property

Theory

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Stream writable.writableObjectMode Property

Don’t start Stream writable.writableObjectMode Property with jargon. Start with read a big CSV. That is the whole point.

Stream writable.writableObjectMode Property order: meaning → createReadStream → one limit. Dumping ten features helps nobody.

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

Use Stream writable.writableObjectMode Property when read a big CSV must stay clear. If a simpler Node.js step works, use that instead.

Stream writable.writableObjectMode Property trap: loading the whole file into RAM. Vikram loses marks for that every viva.

After Stream writable.writableObjectMode Property, Vikram should still remember loading the whole file into RAM.

Close Stream writable.writableObjectMode Property with: “If I skip it, read a big CSV goes wrong like this: loading the whole file into RAM.”

Exam tip

Board: read a big CSV. Dry-run Stream writable.writableObjectMode 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.writableObjectMode Property — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

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

Example

Short notes

Questions

Stream writable.writableObjectMode Property

Example

Short notes

Questions