ping-to-csv.js

const fs = require('fs')

const rx = {
	fail: /^Request timeout/i,
	time: /^(\d\d:\d\d:\d\d\.?\d*)/i,
	seq: /icmp_seq=(\d+)/i,
	dur: /time=([\d\.]+) ms$/i
}

const log = []

fs.readFileSync('./ping.txt', 'utf8').split('\n').forEach(line=>{
	const time = line.match(rx.time)
	const seq = line.match(rx.seq)
	const dur = line.match(rx.dur)
	if(time && seq && dur){
		log.push([
			time[1],
			seq[1],
			dur[1]
		].join(','))
	}
})

console.log(log.join('\n'))