D语言关联数组

import std.stdio;

void main () { 
   int[string] e;      // associative array b of ints that are  

   e["test"] = 3; 
   writeln(e["test"]); 

   string[string] f; 

   f["test"] = "Tuts"; 
   writeln(f["test"]); 

   writeln(f);  

   f.remove("test"); 
   writeln(f); 
}