Text processing script to mine https://remoteok.io/ job listings' titles.

mine-remoteok-io-listings.js

// Get job listings' titles
var listings = Array.from(document.getElementsByTagName('h2'))
                .splice(3)
                .map(function(x) { return x.innerText });

// Tokenize listings' titles
var keywords = [].concat.apply(
  [],
  listings.map(function(x) { return x.split(' ') }));

// Create an object where a key is a keyword and its value is the number of times it appears
var frequency = keywords.reduce(function(acc, x) {
  return {...acc, [x]: acc[x] ? acc[x] + 1 : 1}
}, {});

// Log sorted keywords by descending frequency count
console.log(
  Object.keys(frequency)
    .map(function(keyword) { return [keyword, frequency[keyword]] })
    .sort(function(a, b) { return b[1] - a[1] })
);