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<head>
  <meta charset="utf-8">
  <title>Array entries() — collect pairs</title>
</head>
<body>
  <h1>entries() — collect all pairs</h1>
  <pre id="out"></pre>
  <script>
    (function () {
      var scores = [88, 92, 75];
      var pairs = Array.from(scores.entries());
      var lookup = Object.fromEntries(scores.entries());
      document.getElementById("out").textContent =
        JSON.stringify(pairs) + "\n" + JSON.stringify(lookup);
    })();
  </script>
</body>
</html>

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JavaScript Array entries() — collect pairs (Try It)