Node.js · Theory

Stream readable.setEncoding() Method

Theory

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Stream readable.setEncoding() Method

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

Keep Stream readable.setEncoding() Method small. Amit should finish read a big CSV in a few lines, not a 40-line dump.

Skip Stream readable.setEncoding() Method and loading the whole file into RAM shows up in an upload job.

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

If read a big CSV breaks under Stream readable.setEncoding() Method, check loading the whole file into RAM first.

After Stream readable.setEncoding() Method, Amit should still remember loading the whole file into RAM.

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

Short notes

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

Example

Short notes

Questions

Stream readable.setEncoding() Method

Example

Short notes

Questions