@mxmitch/lotide/countOnly.js

A mini clone of the [Lodash](https://lodash.com) library.

// const assertEqual = function(actual, expected) {
//   if (actual === expected) {
//     console.log(`✅✅✅ Assertion Passed: ${actual} === ${expected}`);
//   } else {
//     console.log(`🛑🛑🛑 Assertion Failed: ${actual} !== ${expected}`);
//   }
// };

// allItems: an array of strings that we need to look through
// itemsToCount: an object specifying what to count
const countOnly = function(allItems, itemsToCount) {
  const results = {};
  for (const item of allItems) {
    if (itemsToCount[item]) {
      if (results[item]) {
        results[item] += 1;
      } else {
        results[item] = 1;
      }
    }
  }
  return results;
};

module.exports = countOnly;