Languages / Node / examples / stream / implement-readable-stream.mjs

import { Readable } from 'node:stream'

const inStream = new Readable({
    read(size) {
        this.push(String.fromCharCode(this.currentCharCode++))
        if (this.currentCharCode > 90 ) {
            this.push(null)
        }
    }
})

inStream.currentCharCode = 65

inStream.pipe(process.stdout)