example of non-error checking in go 1

go1-err-example3.go

// GatherItems collects incoming items. If somehow we get more than n, an error is returned.
func GatherItems(n int) ([]string, error) {
	var items []string
	
	items = append(items, GetItemsFromSourceAlpha()...)
	if len(items) > n {
		return items, fmt.Errorf("more than %d items gathered: %d", n, len(items))
	}

	items = append(items, GetItemsFromSourceBeta()...)
	if len(items) > n {
		return items, fmt.Errorf("more than %d items gathered: %d", n, len(items))
	}
	
	items = append(items, GetItemsFromSourceGamma()...)
	if len(items) > n {
		return items, fmt.Errorf("more than %d items gathered: %d", n, len(items))
	}
	
	return items, nil
}