flutter - 是否应在Dart中的方法输入参数中添加下划线(_)前缀？

Question

两者都可以编译，但是我不知道哪个版本正确？

  int add(int _a, int _b) {
    return _a + _b;
  }

要么

  int add(int a, int b) {
    return a + b;
  }

Answer 1

根据Effective Dart

There is no concept of “private” for local variables, parameters, or library prefixes. When one of those has a name that starts with an underscore, it sends a confusing signal to the reader. To avoid that, don’t use leading underscores in those names.

因此，根据以下准则，代码更正确，

 int add(int a, int b) {
    return a + b;
  }