前端JS：判断list(数组)中的json对象是否重复

<!DOCTYPE html><html><head><meta charset="utf-8"><title>Test</title><script>function displayDate(){ var arr = [{ d: '2015-10-12',C:'Apple'}, { d: '2015-10-12',C:'Apple'}, { d: '2015-10-13',C :'Apple' }]; var find = false; for (var i = 0; i < arr.length; i++) { for (var j = i + 1; j < arr.length; j++) { if (arr[i].d == arr[j].d && arr[i].C==arr[j].C) { find = true; break;} } if (find) break; } alert(find)}</script></head><body><h2>判断list中的json对象是否重复</h2><button type="button" onclick="displayDate()">是否重复</button></body></html>