mapFilter array

mapFilter.js

const mapFilter = (curArray, filterCb, callback) => curArray.map((el, idx) => filterCb(el,idx) ? callback(el,idx) : el )

const testArray = [
  {friends:10, status:"happy"},
  {friends:0, status:"happy"},
  {friends:20, status:"happy"},
  {friends:0, status:"happy"},
  {friends:30, status:"super happy"}
];
const res = mapFilter(testArray, (el) => (el.friends ===0) , (el) => { return {...el, status:"forever alone!" }} ) 
console.log('res ',res);

/* res: 
[
  {friends:10, status:"happy"},
  {friends:0, status:"forever alone!"},
  {friends:20, status:"happy"},
  {friends:0, status:"forever alone!"},
  {friends:30, status:"super happy"}
];
*/