Renaming Objects key

ES6 renaming objects key

renameKeys = (keysMap, obj) => {
  return Object.keys(obj).reduce((acc, key) => {
  const renamedObject = {
  [keysMap[key] || key]: obj[key]
    };
    return {
    ...acc,
    ...renamedObject
    };
    }, {});
  };
    

        renameKeys({
            name: 'Hamid',
            job: 'Backend',
            'a':'hamid',
            'b':'reza'
        }, {
            name_2: 'Pooya',
            job_2: 'Frontend'
        });