Function reduce

reduce<T, U>(arr, fn, initial): U
Reduces an array to a value which is the accumulated result of running each element in the array through the callback.
Type Parameters
- T
- U
Parameters
- arr: T[]
  array to reduce
- fn: ((acc, value, index, array) => U)
  callback to reduce the array
  - - (acc, value, index, array): U
    - Parameters
      acc: U
      value: T
      index: number
      array: T[]
      Returns U
- initial: U
  initial value
Returns U
the reduced value
- Defined in array.ts:154

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