package consumer

import "gitee.com/xxbiji/go-iterator/types"

func Position(iter types.Iterator, fn func(any) bool) (int, bool) {
	if fn == nil || invalidIterator(iter) {
		return 0, false
	}
	index := 0
	for {
		res, done := iter.Next()
		if done {
			return 0, false
		}
		if fn(res) {
			return index, true
		}
		index++
	}
}