somexeample.d

class SomeClass
{
  void someFunc ( )
  {
      int[] some_array;
      
      import std.algorithm;
      
      bool func ( int f )
      {
          return f < 10;          
      }
      
      auto res1 = some_array.filter!func;
      
      
      bool func2 ( int f )
      {
          return f < 20;          
      }
      
      auto res2 = some_array.filter!func2
  }
}