否命题的博客

operator(重载符)class Person { var age; Person(var age) { this.age = age; } ### 重载可以自定义==，-等等 operator +(p) => new Person(age + p.age);}main() { Person p = new Person(10); Person...

couldn’t find “libflutter.so”flutter run 的时候有问题,build 就可以打进去//这样就可以了 flutter run --target-platform android-armflutter Could not find an option named “target-platform”.如果没有这个可能flutter sdk把她remov...