javascript - replace only some value from json to json -

here example:

i have jsona

{ "a":"1", "b":"2", "c":{"a":"1", "b":"2"} } 

and jsonb

{ "b":"2new", "c":{"a":"1new"} } 

i want update first jsona new value in jsonb and, @ end, have result:

{ "a":"1", "b":"2new", "c":{"a":"1new", "b":"2"} } 

manually set every value, like:

jsona.b = jsonb.b; jsona.c.a = jsonb.c.a; 

there way automatically without check every valule foreach?

i wrote this:

jsona = { "a":"1", "b":"2", "c":{"a":"1", "b":"2"} }  jsonb = { "b":"2new", "c":{"a":"1new"} }  (var j in jsona) {     if(jsonb.hasownproperty(j)) {         if (typeof jsona[j] === 'object') {             (var in jsona[j]) {                 if(jsonb[j].hasownproperty(i)) {                    jsona[j][i] = jsonb[j][i];                 }             }         } else {             jsona[j] = jsonb[j];          }     }  } 

check out here: http://jsfiddle.net/ytgqs/