id: no-useless-length-check
valid:
  - 'arr.some(fn)'
  - 'arr.length > 0'
  - 'arr.filter(fn).length === 0'
invalid:
  - 'arr.filter(fn).length !== 0'
  - 'arr.filter(fn).length > 0'
  - 'arr.filter(fn).length != 0'