func hasFile(files []*File, path string) bool {
	for _, f := range files {
		if f.path == path {
			return true
		}
	}

	return false
}
func hasFile(files []*File, path string) bool {
	for _, f := range files {
		if f.path == path {
			return true
		}
	}

	return false
}
func hasFile ( files [ ] * File , path string ) bool { for _ , f := range files { if f . path == path { return true } } return false }
// hasFile return if files has a file which has the path specified by the parameter.
hasFile return if files has a file which has the path specified by the parameter .