如何根据两个对象的键比较它们？

Question

I would like to compare 2 object using their keys. If the objects have the same keys, check their values. If the same save one instance of the pair in a new Object, otherwise save the pair whose value is 1 in the new Objects. Here is my attempt:

var sameKey = false;
function hasSameProps( obj1, obj2 ) {
  for (var x in obj1){
        if (obj2.hasOwnProperty(x)){ // check if the objects have same key 
          samekey = true;
        }
        if (sameKey){

        }
  }
}
var obj1 = {'a':0,'s':0};
var obj2 = {'a':0,'s':1};
hasSameProps( obj1, obj2 ); // should return new Object { 'a':0,'s':1};

Answer 1

You can add the logic inside the if (obj2.hasOwnProperty(x)) like:

if (obj2.hasOwnProperty(x)) {
   newObj[x] = obj1[x] > obj2[x] ? obj1[x] : obj2[x];
}

 var sameKey = false; function hasSameProps(obj1, obj2) { var newObj = {}, samekey; for (var x in obj1) { if (obj2.hasOwnProperty(x)) { newObj[x] = obj1[x] > obj2[x] ? obj1[x] : obj2[x]; } } return newObj; } var obj1 = { 'a': 0, 's': 0 }; var obj2 = { 'a': 0, 's': 1 }; console.log(hasSameProps(obj1, obj2)); 

Answer 2

function hasSameProps( obj1, obj2 ) {
  var returnValue = {};
  for (var x in obj1) {
        returnValue[x]  = obj1[x];
        if( obj2.hasOwnProperty(x)){ 
          if(obj2[x] == 1) {
            returnValue[x]  = obj2[x];
          }
        }
  }
  return returnValue;
}
var obj1={'a':0,'s':0};
var obj2={'a':0,'s':1};

var obj3  = hasSameProps( obj1, obj2 ); 
console.log(obj3);

Answer 3

So: both key and value the same, put in new object; key same, but not value, then put in new object with value 1?

var obj1 = { 'a': 0, 's': 0 };
var obj2 = { 'a': 0, 's': 1 };
var newObj = {};
for (var x in obj1) {
    if (obj2[x] && obj2[x] == obj1[x]) {
        newObj[x] = obj1[x];
    }
    else if (obj2[x] && obj2[x] !== obj1[x]){
        newObj[x] = 1;
    }
}