fold (Function)

Reduces an iterator to a single value by repeatedly applying a function.

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Signature: fold(iterator: Iterator<T>, initial: U, function: (U, T) -> U) -> U

Description: Reduces an iterator to a single value by repeatedly applying a function.

Parameters #

  • iterator (any): The iterator to reduce
  • initial (any): The initial value for the accumulator
  • fn (any): The reduction function that takes (accumulator, current) and returns new accumulator

Returns: any

Example #

range(1, 5) |> fold(0, add)  // sum: 0+1+2+3+4 = 10