Node.js · Theory

Buffer.copy() Method

Theory

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Buffer.copy() Method sits in an upload job. Dev’s job is read a big CSV. Write that first.

Buffer.copy() Method on the board — createReadStream. Then say what read a big CSV looks like after.

Skip Buffer.copy() Method and loading the whole file into RAM shows up in an upload job.

Dev ships Buffer.copy() Method in an upload job. That is the use case worth saying.

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

After Buffer.copy() Method, Dev should still remember loading the whole file into RAM.

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

Exam tip

For Buffer.copy() Method: definition + an upload job + one failure.

const buf = Buffer.from("PrepPilot", "utf8");
console.log(buf.toString("utf8"));
console.log(buf.length);

Buffer.copy() Method — buffer holds raw binary data outside the V8 string heap.