Find Cheapest EC2 Instance

CheapestEC2.js

// https://aws.amazon.com/tw/ec2/pricing/on-demand/

var $item = $('.button.lb-dropdown-label:eq(0) li:eq(0)'),
	clicked = false,
	regions = [];
var interval = setInterval(function() {
	if ($item.length == 0) {
		clearInterval(interval);
		console.log('Cheapest', regions.reduce((a, b) => b.price < a.price ? b : a, { price: 1000}));
	}

	if (!clicked) {
		$item.click().click();
		clicked = true;
	}
	
	var region = $item.data('region');
	if ($('.aws-plc-content:eq(0)').find(`div[data-region=${region}] table`).length > 0) {
		var row = $.map($(`[data-region="${region}"] tr td:nth-child(6)`), el => ({ price: $(el).text(), ec2: $(el).siblings(':first').text() }))
					 .map(row => ({ price: row.price.match(/每小時 (\d*\.\d*) USD/)[1], ec2: row.ec2 }))
					 .map(row => ({ price: parseFloat(row.price), ec2: row.ec2 }))
					 .reduce((a, b) => b.price < a.price ? b : a, { price: 1000 }),
			name = $(`li[data-region="${region}"]:eq(0)`).text();

		regions.push({
			region,
			name,
			price: row.price,
			ec2: row.ec2,
		});

		$item = $item.next();
		clicked = false;
	}
}, 1000);