Grabbing / plotting data from cars.com

carscom.js

//cars.com
//https://twitter.com/randompast/status/986749286208634881
// gnuplot -p PLOTFILEBELOW
// set palette defined (2012 "#ffff00", 2013 "#ff0000", 2014 "#ff00ff", 2015 "#00ff00", 2016 "#00ffff", 2017 "#0000ff", 2018 "#aaffaa")
// set xlabel "mileage"
// set ylabel "price"
// set xrange [0:250000]
// plot "corolla.csv" u 3:2:1 w p lc palette
var getYear = function(c){
	var info = c.getElementsByClassName("listing-row__title")[0]
	var text = info.innerHTML
	var year = /\d{4}/
	return text.match(year)[0]
}
var getPrice = function(c){
	var info = c.getElementsByClassName("listing-row__price")[0]
	var text = info.innerHTML
	var price = /\$\d*\,\d*/
	var dollars = text.match(price)[0]
	return dollars.split(",").join("").slice(1)
}
var getMileage = function(c){
	try{
		var info = c.getElementsByClassName("listing-row__mileage")[0]
		var text = info.innerHTML
		return text.split(" ")[0].split(",").join("")
	}catch(e){
		return "unknown"
	}
}
var makeRow = function(c){
	return [getYear(c), getPrice(c), getMileage(c)]
}
var listAll = function(){
	var l = document.getElementsByClassName("listing-row__details-inner")
	var arr = []
	for (var i = 0; i < l.length; i++) {
		var row = makeRow(l[i])
		if(row[2] != "unknown")
			arr[i] = row
		// console.log(i, arr[i].join(", "))
	}
	console.log(arr.join(" X "))
}