如何使用多个对象遍历json

Question

I have some json-code which has multiple objects in it, as such:

[
    {
        "MNGR_NAME": "Mark",
        "MGR_ID": "M44",
        "EMP_ID": "1849"
    },
    {
        "PROJ_ID": "88421",
        "PROJ_NAME": "ABC",
        "PROJ_ALLOC_NO": "49"
    }
]

And my JSON loop snippet is

function ServiceSucceeded(result) 
{       
  for(var x=0; x<result.length; x++) 
  {      
    alert(result[i].MNGR_NAME);  
    alert(result[i].MGR_ID);     
    alert(result[i].EMP_ID);  
    alert(result[i].PROJ_ID);  
    alert(result[i].PROJ_NAME);  
    alert(result[i].PROJ_ALLOC_NO);  
  }    
}

When I implement it displays alerts that say undefined since result[0] keys != result[1] keys.

Eg: result[0].MNGR_NAME (1st Array) gives you "Mark" but result[1].MNGR_NAME (2nd Array) is not at all in the array and hence gives you undefined

Could you please let me know how to address? I should not get undefined .

Answer 1

I would use

for(index in result) {
    var obj = result[index];
    for(objectIndex in obj) {
        if(objectIndex != "PROJ_ALLOC_NO") {
            // Only alert if the key of the object is not PROJ_ALLOC_NO
            alert(objectIndex + ": " + obj[objectIndex]);
        }
    }
}

This loops over the array, then over the object and displays every key and value of the objects!