TypeScript的Dictionary的写法

TypeScript中做类似ActionScript中的Dictionary功能时的写法

 var  dict: { [index: string]: Function[]; } =  {};
dict[  'Matt' ] = [];  //   ok 
dict[ 'Chris' ] = "123" ;  //  编译警告 
dict[1] =  [];  //  编译警告 

还有一种方法就是使用typescript-collections 里面的Dictionary类

https://github.com/basarat/typescript-collections#a-sample-on-dictionary

用法是这样的。

 class   Person {
    constructor(  public  name: string,  public  yearOfBirth:  number , public  city? :string) {
    }
    toString() {
          return   this .name +  "-"  +  this .yearOfBirth;  //   City is not a part of the key.  
     }
}

  class   Car {
    constructor(  public  company: string,  public  type: string,  public  year:  number  ) {
    }
    toString() {
          //   Short hand. Adds each own property  
         return  collections.toString( this  );
    }
}
  var  dict =  new  collections.Dictionary<Person, Car> ();
dict.setValue(  new  Person( "john" , 1970, "melbourne" ),  new  Car( "honda" ,  "city" , 2002 ));
dict.setValue(  new  Person( "gavin" , 1984),  new  Car( "ferrari" ,  "F50" , 2006 ));
console.log(  "Orig"  );
console.log(dict);

  //   Changes the same john, since city is not part of key  
dict.setValue( new  Person( "john" , 1970,  "sydney" ),  new  Car( "honda" ,  "accord" , 2006 )); 
  //   Add a new john 
dict.setValue( new  Person( "john" , 1971),  new  Car( "nissan" ,  "micra" , 2010 )); 
console.log(  "Updated"  );
console.log(dict);

  //   Showing getting / setting a single car:  
console.log( "Single Item"  );
  var  person =  new  Person( "john" , 1970 ); 
console.log(  "-Person:"  );
console.log(person);

  var  car =  dict.getValue(person);
console.log(  "-Car:"  );
console.log(car.toString()); 

 

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