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Array.fold_with_index

fold_with_indexinitfunction

Documentation​

Combines all the elements of the array, by iteratively applying the passed function with next elements of the array.

Arguments​

  • init: The initial value for the fold.
  • function: A function taking the current value, an index and an item and combining them.

Examples​

Compute the sum of all of the elements and indexes in an array.​

      [0, 1, 2].to_array . fold_with_index 0 (s->i->e->s+i+e)