javascript代码的问题，来自Github的JSON请求

Question

我有一个问题让这个工作。 我还是JS的新手并且学习语法。我试图修改某人的脚本，该脚本是为了在github-repository中返回 ALL 存储库（未经修改的工作正常）。 我试图修改它以仅返回具有指定主要语言的存储库，即＆＃39; Matlab＆＃39;。我现在可能已经被皇家屠杀了。

 $(function () {
 var lang = 'Matlab';
 var lang2 = '#' + lang;
 $('#' + lang).html('Loading...');

 var username = 'lallers';
 var requri = 'https://api.github.com/users/' + username;
 var repouri = 'https://api.github.com/users/' + username + '/repos';
 requestJSON(requri, function (json) {
     var fullname = json.name;
     var username = json.login;
     var aviurl = json.avatar_url;
     var profileurl = json.html_url;
     var location = json.location;
     var followersnum = json.followers;
     var followingnum = json.following;
     var reposnum = json.public_repos;
     var email = json.email;
     if (fullname == undefined) {
         fullname = username;
     }
     var outhtml = '<div class="repolist clearfix"><ul>';

     var repositories;
     $.getJSON(repouri, function (json) {
         repositories = json;
         outputPageContent();
     });

     function outputPageContent() {
         if (repositories.length == 0) {
             outhtml = outhtml + '<p>No repos!</p></div>';
         } else {
             $.each(repositories, function (index) {
                 if (repositories[index].language == lang) {
                     outhtml = outhtml + '<li><a href="' + repositories[index].html_url + '" target="_blank">' + repositories[index].name + '</a></li>';
                 } else {
                     return true;
                 }
             }); // end each statement
             outhtml = outhtml + '</ul></div>';
         } // end else statement
         $('#' + lang).html(outhtml);
     } // end else statement

 }); // end requestJSON Ajax call

 function requestJSON(url, callback) {
     $.ajax({
         url: url,
         complete: function (xhr) {
             callback.call(null, xhr.responseJSON);
         }
     });
 }
});