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Function: reverse()

reverse<T>(comparator): Comparator<T>

Defined in: compare/combinators/index.ts:83

Reverses the order of a comparator.

Useful for inverting existing comparators without rewriting logic.

Type Parameters​

T​

T

Parameters​

comparator​

Comparator<T>

The comparator to reverse

Returns​

Comparator<T>

A reversed comparator

Example​

const users = [
  { name: 'Alice', score: 100 },
  { name: 'Bob', score: 200 },
  { name: 'Charlie', score: 150 }
]

// Sort by score ascending
const scoreAsc = ascending(u => u.score)
users.sort(scoreAsc) // => [100, 200, 150] -> [100, 150, 200]

// Reverse it for descending
users.sort(reverse(scoreAsc)) // => [200, 150, 100]

// Equivalent to:
users.sort(descending(u => u.score))

See​

  • ascending - consider using descending instead
  • descending - consider using ascending instead