Merge two unordered objects with different keys but same value?

Question

Merge objects like obj1 and obj2 to get obj3 in javascript.

obj1 = [{fruit: \'watermelon\', sweetness: 3},{fruit: \'banana\', sweetness: 4},{fruit: \'apple\', sw         


        

Answer 1

let obj1 = [{fruit: 'watermelon', sweetness: 3},{fruit: 'banana', sweetness: 4},{fruit: 'apple', sweetness: 5}];
let obj2 = [{fruit_name: 'apple', color: 'red'},{fruit_name: 'banana', color:'yellow'},{fruit_name: 'watermelon', color:'green'}];

function regulate(a) {
  return a.map(v => {
    if (v.fruit) {
        v.fruit_name = v.fruit;
        delete v.fruit;
     }
     return v;
  });
}


let a = [].concat(regulate(obj1), regulate(obj2));

let merged = [];
a.reduce((m, v) => {
  let f = m.filter(v2 => v2.fruit_name === v.fruit_name);
  if (f.length > 0) {
    Object.assign(f[0], v);
  } else {
    m.push(v);
  }
  return m;
}, merged);

console.log(merged);