//The map function in lodash is quite frequently used. e.g.:
const team = [{"name": "jimmy", "rate": 100}, {"name": "tom", "rate": 88} ];
_.map(team,  t=>t.rate + 1);

//so normaly the iteration function is provided. But what if the iteration function is not there?
const team = [{"name": "jimmy", "rate": 100}, {"name": "tom", "rate": 88} ];
const b = _.map(team);
console.log(b);  //give the same result.

//actually it can be useful in this case:
const team = {"manager": {"name": "jimmy", "rate": 100}, "member": {"name": "tom", "rate": 88}, "member": {"name": "jack", "rate": 88}};
console.log(_.map(team));

//The object is extracted and built to an array.