Get surnames of MS CS students at CU

surnames.js

// Before you run this code, add the id `ms` to the masters students HTML table
Array.from(
  [].slice.call(document.querySelectorAll("table#ms tr"))
  .map((tr) => tr.children[0].innerText.split(",")[0])
  .reduce((acc, x) => {
      acc.has(x) ? acc.set(x, acc.get(x) + 1) : acc.set(x, 1)
      return acc;
  }, new Map())
).sort(([valA, countA], [valB, countB]) => {
    if (countA > countB) return -1;
    else if (countA < countB) return 1;
    else return valA > valB;
}).filter((_, i) => i < 10).forEach((x) => console.log(x))

Class of 2015-2016 and 2014-2015

source