Need to create a new array from old one with some changes

I have this array:

let oldarr = [{typeid:1,percent:50,key:1, name:"ger"},
              {typeid:3,percent:50,key:2, name:"geghr"},
              {{typeid:5,percent:50,key:3, name:"ggdfer"}]

I want to create a new one that looks like this:

let newarr = [{id:'', percent:''}]

The newarr‘s id is equal to typeid of oldarr. How to create new array?

>Solution :

You could achieve this using the map function:

let oldarr = [{typeid:1,percent:50,key:1, name:"ger"},
              {typeid:3,percent:50,key:2, name:"geghr"},
              {typeid:5,percent:50,key:3, name:"ggdfer"}];

let newArray = oldarr.map(item=> ({id : item.typeid, percent: item.percent}));

console.log(newArray);