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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Lodash _.partial path</title>
</head>
<body>
  <h1>API path builder</h1>
  <pre id="out"></pre>
  <script src="https://cdn.jsdelivr.net/npm/lodash@4.17.21/lodash.min.js"></script>
  <script>
    (function () {
      function joinSegments(a, b, c) {
        return [a, b, c].join("/");
      }
      var apiPath = _.partial(joinSegments, "api", "v2");
      document.getElementById("out").textContent = JSON.stringify(
        { users: apiPath("users"), posts: apiPath("posts") },
        null,
        2
      );
    })();
  </script>
</body>
</html>

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Lodash _.partial — multi-prefix path (Try It)