objA = {
"D組": {"title":"D組","val":1,"unit":"bar"},
"C組": {"title":"C組","val":1,"unit":"bar"},
"B組": {"title":"B組","val":1,"unit":"bar"},
"A組": {"title":"A組","val":1,"unit":"bar"},
"右上土壓": {"title":"右上土壓","val":1,"unit":"bar"},
"右下土壓": {"title":"右下土壓","val":1,"unit":"bar"},
"上部土壓": {"title":"上部土壓","val":1,"unit":"bar"},
"左上土壓": {"title":"左上土壓","val":1,"unit":"bar"},
"左下土壓": {"title":"左下土壓","val":1,"unit":"bar"}
};

objB = {
"D組": 0,
"C組": 0,
"B組": 0,
"A組": 0,
"右上土壓": 0,
"右下土壓": 0,
"上部土壓": 0,
"左上土壓": 0,
"左下土壓": 0
};

如何用es6方法將后者的值賦值給前者的val?
真實的數(shù)據(jù)結構比這個要復雜，求大神給個思路。