你用过2.13吗？
Auto-application to `()` is deprecated. Supply the empty argument list `()` explicitly to invoke method now, or remove the empty argument list from its definition (Java-defined methods are exempt).

method block in object 叉叉 is deprecated: Use conventional Future patterns (map, flatMap, for-yield, etc.) instead

method + in trait MapOps is deprecated (since 2.13.0): Use ++ with an explicit collection argument instead of + with varargs

method + in class Long is deprecated (since 2.13.0): Adding a number and a String is deprecated. Use the string interpolation `s"$num$str"`


又比如 加这样的语法 是要解决什么实际问题吗？
叉叉: FiniteDuration = 1.second,

【 在 xWvxYWYxvWx 的大作中提到: 】
: 因为绝大多数人根本学不会或者不了解。
: 最后5行，说了4个事实，居然全是错的。
: 这就很能说明问题了。
: ...................
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