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json格式下的對象去重

key pre object all pan != json格式 ++ obj

var arr = [{ a: "1", b: "5", c: 4, f: 7}, 
               { a: "1", b: "5", c: "4"},
               { b: "6", c: "6", d: "6",f:7}]
    var allArr = []
    var count = 0
    for (var i = 0; i < arr.length; i++) {
          var lt = Object.keys(arr[i]).length
        var flag = true;
        for (var
j = 0; j < allArr.length; j++) { if (lt != Object.keys(allArr[j]).length){ flag = true; }else{ for (var k = 0; k < Object.keys(arr[i]).length; k++) { if (arr[i][Object.keys(arr[i])[k]] === allArr[j][Object.keys(arr[i])[k]]) { count
++ if (count == Object.keys(arr[i]).length){ flag = false; } }; } }   };   if (flag) { allArr.push(arr[i]);   }; }; console.log(allArr)

json格式下的對象去重