CFP - Docs - withStringsDescending

withStringsDescending

(left: string, right: string) => number

A compare function which orders strings reverse-alphabetically.

Ordering is case-sensitive

Try It

const arr = ['c', 'a', 'b']
const updatedArr = arr.toSorted(withStringsDescending)
console.log(updatedArr) // is ['c', 'b', 'a']
const arr = ['c', 'a', 'b']
const updatedArr = arr.toSorted(withStringsDescending)
console.log(updatedArr) // is ['c', 'b', 'a']

Try It

const arr = ['c', 'a', 'b']
const updatedArr = arr.toSorted(
  withStringsDescending
)
console.log(updatedArr) // is ['c', 'b', 'a']
const arr = ['c', 'a', 'b']
const updatedArr = arr.toSorted(
  withStringsDescending
)
console.log(updatedArr) // is ['c', 'b', 'a']

We often want to order reverse-alphabetically. Below, we have some photos of friends. Let's find photos of Tom by ordering them in reverse.

Try It

const photos = [
  {
    name: 'tom - camping.jpg',
    created: new Date('2025 03 06'),
  },
  {
    name: 'chris - with the cats.jpg',
    created: new Date('2025 02 15'),
  },
  {
    name: 'ken - garden.jpg',
    created: new Date('2025 02 02'),
  },
  {
    name: 'tom - chillin.jpg',
    created: new Date('2025 03 09'),
  },
  {
    name: 'chris - soccer.jpg',
    created: new Date('2025 02 21'),
  },
]

const byNameDesc = compareByProp('name', withStringsDescending)
const orderPhotos = order(byNameDesc)
const orderedNames = orderPhotos(photos).map(get('name'))
console.log(orderedNames)
// is [
//   tom - chillin.jpg
//   tom - camping.jpg
//   ken - garden.jpg
//   chris - with the cats.jpg
//   chris - soccer.jpg
// ]
type Photo = {
  name: string
  created: Date
}

const photos: Photo[] = [
  {
    name: 'tom - camping.jpg',
    created: new Date('2025 03 06'),
  },
  {
    name: 'chris - with the cats.jpg',
    created: new Date('2025 02 15'),
  },
  {
    name: 'ken - garden.jpg',
    created: new Date('2025 02 02'),
  },
  {
    name: 'tom - chillin.jpg',
    created: new Date('2025 03 09'),
  },
  {
    name: 'chris - soccer.jpg',
    created: new Date('2025 02 21'),
  },
]

const byNameDesc = compareByProp('name', withStringsDescending)<Photo>
const orderPhotos = order(byNameDesc)
const orderedNames = orderPhotos(photos).map(get('name'))
console.log(orderedNames)
// is [
//   tom - chillin.jpg
//   tom - camping.jpg
//   ken - garden.jpg
//   chris - with the cats.jpg
//   chris - soccer.jpg
// ]

Try It

const photos = [
  {
    name: 'tom - camping.jpg',
    created: new Date('2025 03 06'),
  },
  {
    name: 'chris - with the cats.jpg',
    created: new Date('2025 02 15'),
  },
  {
    name: 'ken - garden.jpg',
    created: new Date('2025 02 02'),
  },
  {
    name: 'tom - chillin.jpg',
    created: new Date('2025 03 09'),
  },
  {
    name: 'chris - soccer.jpg',
    created: new Date('2025 02 21'),
  },
]

const byNameDesc = compareByProp(
  'name',
  withStringsDescending
)
const orderPhotos = order(byNameDesc)
const orderedNames = orderPhotos(photos).map(
  get('name')
)
console.log(orderedNames)
// is [
//   tom - chillin.jpg
//   tom - camping.jpg
//   ken - garden.jpg
//   chris - with the cats.jpg
//   chris - soccer.jpg
// ]
type Photo = {
  name: string
  created: Date
}

const photos: Photo[] = [
  {
    name: 'tom - camping.jpg',
    created: new Date('2025 03 06'),
  },
  {
    name: 'chris - with the cats.jpg',
    created: new Date('2025 02 15'),
  },
  {
    name: 'ken - garden.jpg',
    created: new Date('2025 02 02'),
  },
  {
    name: 'tom - chillin.jpg',
    created: new Date('2025 03 09'),
  },
  {
    name: 'chris - soccer.jpg',
    created: new Date('2025 02 21'),
  },
]

const byNameDesc = compareByProp(
  'name',
  withStringsDescending
)<Photo>
const orderPhotos = order(byNameDesc)
const orderedNames = orderPhotos(photos).map(
  get('name')
)
console.log(orderedNames)
// is [
//   tom - chillin.jpg
//   tom - camping.jpg
//   ken - garden.jpg
//   chris - with the cats.jpg
//   chris - soccer.jpg
// ]