V2_THANKS

gistfile1.js

var Urls = function(startUrl){
  this.startUrl = startUrl;
  this.page = 0;
  this.homePage = '';
	this.heartsSent = 0;
	this.heartsRecv = 0;
}
Urls.prototype.crawl = function(year){
  var self = this;
	var url = this.startUrl + this.page;
	var end = false;
	$.get(url, function(data, status){
		self.page += 1
		self.homePage = $(data);
		if(year == undefined){
			self.heartsRecv += self.homePage.find('.data tr td:nth-child(2):contains("收到谢意")').length;
			self.heartsSent += self.homePage.find('.data tr td:nth-child(2):contains("发送谢意")').length;
			end = self.homePage.find('.normal_page_right').first().hasClass('disable_now');
		} else {
			  self.homePage.find('.data tr').each(function(i){
					var tr = $(this);
					var mDate = new Date(tr.find('td:nth-child(1)').text());
					end = mDate < new Date(year+'-01-01');
					if(!end && new Date(year+1+'-01-01') > mDate ){
						self.heartsRecv += tr.find('td:nth-child(2):contains("收到谢意")').length;
						self.heartsSent += tr.find('td:nth-child(2):contains("发送谢意")').length;
					}
				});
		}
		console.log('第'+self.page+'页');
		if(!end){
			self.crawl(year);
		} else {
			console.log('共收到谢意：'+self.heartsRecv);
			console.log('共发送谢意：'+self.heartsSent);
		}
	});
}
new Urls('https://www.v2ex.com/balance?p=').crawl(2016);