Node.js · Theory

Stream readable.pause() Method

Theory

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Stream readable.pause() Method

If you can teach Stream readable.pause() Method using read a big CSV, you know it. If you only know the heading, you don’t.

Stream readable.pause() Method on the board: createReadStream. Then say what read a big CSV looks like after.

Stream readable.pause() Method exists so Asha can keep read a big CSV correct in an upload job.

Asha ships Stream readable.pause() Method in an upload job. That is the use case worth saying.

Stream readable.pause() Method trap — loading the whole file into RAM. Asha loses marks for that every viva.

Place Stream readable.pause() Method next to nearby Node.js work — createReadStream is the link.

Close Stream readable.pause() Method with: “If I skip it, read a big CSV goes wrong like this: loading the whole file into RAM.”

Exam tip

For Stream readable.pause() Method: definition + an upload job + one failure.

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

Short notes

DefStream readable.pause() Method — Asha uses it for read a big CSV in an upload job.
RuleStream readable.pause() Method → createReadStream.
RememberStream readable.pause() Method + an Express route (an upload job).
UseStream readable.pause() Method in an upload job (read a big CSV).
TrapStream readable.pause() Method — loading the whole file into RAM.
ExStream readable.pause() Method → 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 readable.pause() Method

Example

Short notes

Questions

Stream readable.pause() Method

Example

Short notes

Questions