Can you provide examples of parsing HTML?

Question

How do you parse HTML with a variety of languages and parsing libraries?

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When answering:

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Answer 1

Language: JavaScript/Node.js

Library: Request and Cheerio

var request = require('request');
var cheerio = require('cheerio');

var url = "https://news.ycombinator.com/";
request(url, function (error, response, html) {
    if (!error && response.statusCode == 200) {
        var $ = cheerio.load(html);
        var anchorTags = $('a');

        anchorTags.each(function(i,element){
            console.log(element["attribs"]["href"]);
        });
    }
});

Request library downloads the html document and Cheerio lets you use jquery css selectors to target the html document.