RequireJS, Conditional baseUrl

gistfile1.js

require.config({
    baseUrl: (function determineBaseUrl() {
        var environments = {
            'default': '/ui/scripts/js/',
            'dev.trutv.com': '//z.devcdn.turner.com/trutv/trutv.com/ui/scripts/js/',
            'www.trutv.com': '//z.cdn.turner.com/trutv/trutv.com/ui/scripts/js/'
        };

        return ( environments[window.location.hostname] || environments.default );
    })()
});