查找和由值在嵌套数组

Question

除去对象阵列我有具有以下结构的阵列：

var questions = [ 
    {"answer": 
     ["A1", "A2", "A3"] 
    }, 
    {"answer": 
     ["B1"] 
    }, 
    {"answer": 
     ["C1", "C2"] 
    } 
] 

我也有对象的像下面的数组：

var answers = [ 
    {"value": "A1"}, 
    {"value": "A512"}, 
    {"value": ""}, 
    {} 
]; 

对于每个对象在answers（如果它不是{}）我想查找相应的值是否出现在questions的某个对象中。如果是这样，我想更新一个counter变量，并从questions中删除该对象。我如何实现这一目标？

Answer 1

试着像您到目前为止已经试过这

var questions = [{ 
    "answer": ["A1", "A2", "A3"] 
}, { 
    "answer": ["B1"] 
}, { 
    "answer": ["C1", "C2"] 
}]; 
var count = 0; 
answers.forEach(function(ans) { 
    var flag = isExists(ans.value); 
    flag && count++; 
}); 
console.log(count); 

function isExists(value) { 

    return questions.some(function(ques) { 
     var ind = ques.answer.indexOf(value); 
     if (ind > -1) { 
      ques.answer.splice(ind, 1); 
      return true; 
     } 
    }); 

}