// Normal way
if ( this.orderBy ) {
  results = this.order === 'asc' ? 
  results[0].sort( (a, b) => ( 
    a[ this.orderBy ] > b[ this.orderBy ] ) ? 1 : -1 ):
  results[0].sort( (a, b) => ( 
    a[ this.orderBy ] < b[ this.orderBy ] ) ? 1 : -1 );
}

// Better way
const inversionFactor = this.order === 'asc' ? 1 : -1;
results = results[0].sort( (a, b) =>
    a[ this.orderBy ] < b[ this.orderBy ] : -1 * inversionFactor : 1 * inversionFactor
);

// this is a reusable function and can go outside of other functions
const compareBy = (prop, invert) => (a, b) => {
    if (a[prop] === b[prop]) { return 0; } 
    return (a[prop] < b[prop] ? -1 : 1) * (invert ? -1 : 1);
};

results = results[0].sort(compareBy(this.orderBy, this.order === 'desc'));