Function spanIndex

packages/effect/src/Array.ts:870–879

(self: Iterable<A>, predicate: (a: A, i: number) => boolean)

})

const spanIndex = <A>(self: Iterable<A>, predicate: (a: A, i: number) => boolean): number => {
  let i = 0
  for (const a of self) {
    if (!predicate(a, i)) {
      break
    }
    i++
  }
  return i
}

/**
 * Split an `Iterable` into two parts: