Node.js · Theory

Stream writable.destroy() Method

Theory

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Stream writable.destroy() Method

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

Keep Stream writable.destroy() Method small. Sara should finish read a big CSV in a few lines, not a 40-line dump.

Stream writable.destroy() Method exists so Sara can keep read a big CSV correct in an upload job.

Sara ships Stream writable.destroy() Method in an upload job. That is the use case worth saying.

Stream writable.destroy() Method miss — loading the whole file into RAM. Fix it before you talk about advanced Node.js.

After Stream writable.destroy() Method, Sara should still remember loading the whole file into RAM.

One breath for Stream writable.destroy() Method, then read a big CSV, then loading the whole file into RAM. Sit down.

Exam tip

Say Stream writable.destroy() Method in one breath, then createReadStream, then 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.destroy() Method — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

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

Example

Short notes

Questions

Stream writable.destroy() Method

Example

Short notes

Questions