How to convert a nested object into an array of objects?

It is a conversion of javascript objects

inputJson = {
  "mn": {
    "mt1": 1,
    "mtop": 2,
    "ot1": 3
  },
  "ln": {
    "mt1": 4,
    "mtop": 5,
    "ot1": 6
  }
}

d = {};
for(var key1 in inputJson){ 
  for(var key2 in inputJson[key1]) { 
    if(!(key2 in d)){ 
      d[key2]={};
    } 
    d[key2][key1] = inputJson[key1][key2];
  }
}

v = []; 
for(var k in d){ 
  var o = {}; 
  o.rs=k; 
  for(var k2 in d[k]){ 
    o[k2] = d[k][k2]; 
  } 
  v.push(o);
}

//result is in v

note: the next time you should shown example code or not will help

You can iterate through the object and push each root property inside an array:

var arr = [];

for (var p in inputJson){
  arr.push(inputJson[p]);
}

console.log(arr);