如何在json中檢查空值？

Question

下面是我的JSON

{ 
    "mname": 
    [ 
    { 
     "Mname":"abc", 
     "pname":[], 
     "rewards":null 
    } 
    ] 
} 

如何檢查獎勵陣列包含空值？

Answer 1

試試這個代碼，

var data = { 
     "mname": [ 
      { 
       "Mname": "abc", 
       "pname": [], 
       "rewards": null 
      } 
      ] 
    } 

    $.each(data.mname , function(key, value) { 
     if(value.rewards == null || value.rewards == undefined){ 
       // Add your codes/logic 
     } 
    }); 

Answer 2

試試這個

var data = { 
    "mname": 
    [ 
    { 
     "Mname":"abc", 
     "pname":[], 
     "rewards":null 
    } 
    ] 
} 

if(data.mname[0].rewards == null || data.mname[0].rewards == undefined){ 


}