HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Lodash _.findKey — function predicate</title>
</head>
<body>
  <h1>_.findKey — function predicate</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      var users = {
        user1: { age: 25, isAdmin: true  },
        user2: { age: 30, isAdmin: false },
        user3: { age: 22, isAdmin: true  }
      };
      var lines = [];
      lines.push(_.findKey(users, function (u) { return u.isAdmin; }));
      lines.push(_.findKey(users, "isAdmin"));
      lines.push(_.findKey(users, function (u, key) {
        return key.endsWith("3") && u.age < 30;
      }));
      document.getElementById("out").textContent =
        lines.join(String.fromCharCode(10));
    })();
  </script>
</body>
</html>

Lines: 0 | Characters: 0

Live Preview Auto-refresh on Run

Lodash _.findKey — function predicate, mind the argument order (Try It)