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  <title>Lodash _.mapValues - basic transform</title>
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  <h1>_.mapValues - transform every value</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var scores = { a: 1, b: 2, c: 3 };
      var fruits = { a: "apple", b: "banana", c: "cherry" };
      var doubled = _.mapValues(scores, function (value) {
        return value * 2;
      });
      var upper = _.mapValues(fruits, function (value) {
        return value.toUpperCase();
      });
      var lines = [
        "doubled : " + JSON.stringify(doubled),
        "upper   : " + JSON.stringify(upper),
        "source  : " + JSON.stringify(scores)
      ];
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
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