JavaScript数组对象去重实现方法

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<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>www.jb51.net js 对象去重</title>
</head>
<body>
<script>
var obj = [
    {year: '2013-2014', term: '1'},
    {year: '2013-2014', term: '2'},
    {year: '2013-2014', term: '3'},
    {year: '2013-2014', term: '2'},
    {year: '2014-2015', term: '1'},
    {year: '2013-2014', term: '2'}
    ]
 var unique = {};
 obj.forEach(function(gpa) {
   unique[JSON.stringify(gpa)] = gpa
 });
 obj = Object.keys(unique).map(function(u) {
   return JSON.parse(u)
 });
 console.log(unique)
</script>
</body>
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