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Tim Smart

@timsmart.co

223 followers 8 following 9 posts

I hack on effect.website

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Tim Smart @timsmart.co · 16/12/2024

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Tim Smart @timsmart.co · 05/12/2024

import * as Fs from "node:fs/promises"

export async function* readReverse(path: string, chunkSize = 1024) {
const file = await Fs.open(path, "r")
const stat = await file.stat()

let pos = stat.size
while (true) {
pos = Math.max(0, pos - chunkSize)

const chunk = Buffer.alloc(chunkSize)
const result = await file.read(chunk, 0, chunkSize, pos)
yield chunk.subarray(0, result.bytesRead).reverse()

if (pos === 0) break
}
}