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Node fs.appendFile()

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Node fs.appendFile()

Node fs.appendFile() (function) sits in an upload job. Riya’s job is read a big CSV. Write that first.

Do Node fs.appendFile() (function) once by hand. createReadStream. Change one input. Say the new result out loud.

Skip Node fs.appendFile() (function) and loading the whole file into RAM shows up in an upload job.

Node fs.appendFile() (function) shows up in an upload job. Name read a big CSV, not “a real-world scenario”.

Don’t do this with Node fs.appendFile() (function): loading the whole file into RAM. Interviewers spot it in ten seconds.

After Node fs.appendFile() (function), Riya should still remember loading the whole file into RAM.

Close Node fs.appendFile() (function) with: “If I skip it, read a big CSV goes wrong like this: loading the whole file into RAM.”

Exam tip

For Node fs.appendFile() (function): 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);

Node fs.appendFile() — fs reads/writes files. Prefer promises/async APIs in real apps.

Short notes

DefNode fs.appendFile() (function) — Riya uses it for read a big CSV in an upload job.
RuleNode fs.appendFile() (function) → createReadStream.
RememberNode fs.appendFile() (function) + an Express route (an upload job).
UseNode fs.appendFile() (function) in an upload job (read a big CSV).
TrapNode fs.appendFile() (function) — loading the whole file into RAM.
ExNode fs.appendFile() (function) → 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);

Node fs.appendFile()

Example

Short notes

Questions

Node fs.appendFile()

Example

Short notes

Questions