Function compareBy

compareBy<T, O>(selector: ((t: T) => O), comparator?: Comparator<O>): Comparator<T>
Creates a comparator that compares two values of type T, based on the selected value of type O and the given comparator. If no comparator is passed, the naturalOrder comparator will be used.

Example
```
const idComparator = compareBy(x => x.id, naturalOrder);
[{ id: 1, name: 'JavaScript' }, { id: 0, name: 'TypeScript' }].sort(idComparator);
```
Type Parameters
Type Parameters
- T
- O
Parameters
- selector: ((t: T) => O)
  
  function to extract the comparable value
  - - (t: T): O
    - Parameters
      
      t: T
      
      Returns O
- comparator: Comparator<O> = naturalOrder
  
  comparator for the extracted values, defaults to naturalOrder
Returns Comparator<T>
- Defined in factories.ts:13

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