AMD Flavors.

defines.js

// Anonymous empty module.
define();

// Anonymous values.
define({});
define(true);
define(1234);
define(null);
define(undefined);

// Anonymous function.
define(function() {});

// Anonymous function with dependencies.
define(["depA"], function(depA) {});

// Anonymous CJS.
define(function(require, exports, module) {});

// Anonymous mixed dependencies and CJS.
define(["exports", "depA"], function(exports, depA) {});

// Named module.
define("name");

// Named module values.
define("name", {});
define("name", true);
define("name", 1234);
define("name", null);
define("name", undefined);

// Named function.
define("name", function() {});

// Named function with dependencies
define("name", ["depA"], function(depA) {});

// Named CJS.
define("name", function(require, exports, module) {});

// Named mixed dependencies and CJS.
define("name", ["exports", "depA"], function(exports, depA) {});

requires.js

// Empty require.
require();

// Set a configuration.
require({ baseUrl: "" });

// Require a resolved module.
require("modA");

// Require an unresolved module.
require(["modA"]);

// Set a configuration and require.
require({ baseUrl: "" }, "modA");

// Set a configuration, require, and do nothing else.
require({ baseUrl: "" }, ["modA"]);

// Require an unresolved module and callback.
require(["modA"], function(modA) {});

// Set a configuration, require an unresolved module, and callback.
require({ baseUrl: "" }, ["modA"], function(modA) {});

define(["exports", "depA"], function(require, depA) {});

Bad copy-paste?

@juandopazo I had accidentally used require before instead of exports to indicate CJS. Fixed and updated, thanks for the catch!