interface{} 任意参数传值
函数的传值中，interface{}是可以传任意参数的
想当然的写了如下代码测试，然而并不好使
func main() {
Any(1)
Any("222")
}
func Any(v interface{}) {
v1:=int(v)
println(v1)
}
搞了半天发现需要如下处理，不得不佩服go的严谨
func main() {
Any(1)
Any("222")
}
func Any(v interface{}) {
if v2, ok := v.(string);ok{
println(v2)
}else if v3,ok2:=v.(int);ok2{
println(v3)
}
}
原因如下：
Conversions are expressions of the form T(x) where T is a type and x is an expression that can be converted to type T.
A non-constant value x can be converted to type T in any of these cases:
- x is assignable to T.
- x's type and T have identical underlying types.
- x's type and T are unnamed pointer types and their pointer base types have identical
- underlying types.
- x's type and T are both integer or floating point types.
- x's type and T are both complex types.
- x is an integer or a slice of bytes or runes and T is a string type.
- x is a string and T is a slice of bytes or runes.
翻译太渣，各位看官请自行食用
