Flatten a nested array of objects over a array field

Question

Have an object a1 =

[{name:\'x\',age:21, addr:[{flat:1,add:\'xyz\'},{flat:2,add:\'xsr\'}]},
{name:\'y\',age:22, addr:[{flat:3,add:\'xyz1\'},{flat:4,add:\'xsr1\'}         


        

Answer 1

You can use reduce(), forEach() and Object.assign() to return desired result.

var data = [{name:'x',age:21, addr:[{flat:1,add:'xyz'},{flat:2,add:'xsr'}]},
{name:'y',age:22, addr:[{flat:3,add:'xyz1'},{flat:4,add:'xsr1'}]}];

var result = data.reduce(function(r, o) {
  o.addr.forEach(function(e) {
    r.push(Object.assign({name: o.name, age: o.age}, e));
  })
  return r;
}, []);

console.log(result)