Lodash pickAs - pick properties from object into new one under different keys

Question

Is there any way how to pick property from object into new object under different key?

E.g.:

// pseudo
let a = {prop1: 'a', prop2: 'b', prop3: 'c'}
_.pickAs(a, {prop1: 'first', prop3: 'second'}
// {first: 'a', second: 'c'}

Answer 1

You can use Array.reduce() with Object.entries() to create a pickAs() method:

const a = {prop1: 'a', prop2: 'b', prop3: 'c'}

const pickAs = (obj, props) => 
  Object.entries(obj)
  .reduce((r, [k, v]) => {
    if(k in props) r[props[k]] = v;
  
    return r;
  }, {});
  
const result = pickAs(a, {prop1: 'first', prop3: 'second'});
console.log(result) // {first: 'a', second: 'c'}