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  <title>Lodash _.update - filter admin users</title>
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  <h1>_.update - filter admin users</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var data = {
        users: [
          { id: 1, name: "John", isAdmin: false },
          { id: 2, name: "Alice", isAdmin: true },
          { id: 3, name: "Bob", isAdmin: false }
        ]
      };
      _.update(data, "users", function (users) {
        return users.filter(function (u) { return u.isAdmin; });
      });
      var lines = [
        "admins only:",
        JSON.stringify(data.users, null, 2),
        "",
        "count: " + data.users.length
      ];
      document.getElementById("out").textContent = lines.join("\n");
    })();
  </script>
</body>
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