Concat two arrays But concat is not working

$(document).ready(function() {
    var GlobalNews = [];
    var CommentArray = [];
    var NewsArray = [];

    var CommentArr = {};
    CommentArr['Comment'] = 'aaa';
    CommentArray.push(CommentArr);   

    var NewsArr = {};
    NewsArr['NewsNo'] = 'bbb'
    NewsArr['Desc'] = 'vvv';
    NewsArray.push(NewsArr);

    GlobalNews = $.merge( CommentArray, NewsArray );
    console.log(GlobalNews)
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>