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  <meta charset="utf-8">
  <title>result — default fn</title>
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<body>
  <h1>result default function</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    var object = { a: [{ b: { c1: 3, c2: _.constant(4) } }] };
    document.getElementById("out").textContent =
      String(_.result(object, "a[0].b.c3", _.constant("default")));
  </script>
</body>
</html>

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Lodash _.result — default function (Try It)