Is there a way to map associative arrays

[Brian Schott via Digitalmars-d-learn]

On Friday, 1 August 2014 at 23:33:22 UTC, Freddy wrote:
> On Friday, 1 August 2014 at 23:22:06 UTC, bearophile wrote:
>> Freddy:
>>
>>> uint[uint] test;
>>>
>>> void main(){
>>> 	test=[0:2 ,1:3 ,2:4];
>>> 	writeln(test.map!(a=>a-2));
>>> }
>>
>> If you need keys or values you have .keys .values, .byKey, 
>> .byValue (the first two are eager). If you need both you are 
>> out of luck, and if you want to write safe code it's better to 
>> use a foreach loop. If you want to live dangerously you can 
>> use a test.byKey.zip(test.byValue).
>>
>> Take a look in Rosettacode, there are examples for all of them.
>>
>> Bye,
>> bearophile
> Sorry, i wasn't very clear.
> I wanted to know if there a way to lazily change the look up
> operation
> eg:
> assert(test[1]==1);
> assert(test[2]==2);

Give your struct/class a method called "opIndex".

http://dlang.org/operatoroverloading.html#Array