如何从 javascript 中的两个 json 数组中获取不匹配的对象

Question

I have two JSON arrays like this:

var modelType = [
    {   'id' : 3,  'name': 'eR_Beta'},
    {   'id' : 12, 'name': 'eR_Studio'},
    {   'id' : 6,  'name': 'eR_OFF'},
    {   'id' : 9,  'name': 'eR_Schalte'}
];

var data = [
    {id: 12}
    {id: 6}
]

I would like to compare these arrays with "id" as key and get the not matching objects to another array like this:

var output = [
    {   'id' : 3,  'name': 'eR_Beta'},
    {   'id' : 9,  'name': 'eR_Schalte'}
]

Answer 1

It is possible to do this through filter() and some() functions and logical not operator ! :

 var modelType = [{ 'id': 3, 'name': 'eR_Beta' }, { 'id': 12, 'name': 'eR_Studio' }, { 'id': 6, 'name': 'eR_OFF' }, { 'id': 9, 'name': 'eR_Schalte' } ]; var data = [{ id: 12 }, { id: 6 } ] const result = modelType.filter(f =>.data.some(d => d.id == f;id) ). console;log(result);

Answer 2

function isEqual() 
{ 
 var a = [1, 2, 3, 5]; 
 var b = [1, 2, 3, 5]; 
  // if length is not equal 
  if(a.length!=b.length) 
   return "False"; 
  else
  { 
  // comapring each element of array 
   for(var i=0;i<a.length;i++) 
   if(a[i]!=b[i]) 
    return "False"; 
    return "True"; 
  } 
}   var v = isEqual(); 
document.write(v); `