Function unique

unique<T>(values: Iterable<T>, equal?: (x: T, y: T) => boolean): readonly T[]
Retains the unique values of a collection.

Keeps the first occurrence of each value, dropping later duplicates. Without a comparator, values are deduplicated by identity the way a Set does (SameValueZero, so NaN collapses and -0 equals +0) in a single pass; pass equal to compare by a custom relation instead, at the cost of a scan over the earlier values for each value.
Type Parameters
- T
  The type of the contained values
Parameters
- values: Iterable<T>
  The values to deduplicate; drawn from exactly once, so single-pass iterators are safe to pass
- Optionalequal: (x: T, y: T) => boolean
  An optional custom equality function for comparing values; without it, values are compared by Set identity (SameValueZero)
Returns readonly T[]
A new array holding the first occurrence of each unique value from values, preserving their original order
- Defined in values/arrays.ts:154