Deep fetch properties on js objects, including array paths

deep.js

function deepFetch( object, path ) {
  return path.split( '.' ).reduce( ( value, part ) => {
    if ( Array.isArray( value ) ) {
      return value.reduce( (arr, v) => arr.concat( deepFetch( v, part ) ), [] );
    } else if ( part === '*' ) {
      return Object.keys( value ).map( p => value[p] );
    }
    return value[part];
  }, object );
}


const easyObject = { foo: { bar: 'my secret value' } };

const arrayObject = {
  foo: [
    { '0': { bar: 'my secret value' } },
    { 'x': { bar: 'my other secret' } }
  ]
};

console.assert( deepStartSix( superComplexObj, 'foo.*.bar' ), 'my secret value' );
console.assert( deepStartSix( easyObject, 'foo.bar' ), 'my secret value' );