2014-07-09 17:50 GMT+02:00 Cecil Westerhof <[email protected]>:
> 2014-07-09 17:32 GMT+02:00 Timothy Baldridge <[email protected]>:
>
> (name :foo)
>>
>> will return the name as a string
>>
>> (symbol (name :foo))
>>
>> Converts the name of the keyword to a symbol
>>
>
> It is not even necessary. I changed to keywords. The code uses:
> `(You see a ~obj on the floor.)
>
> And it is displayed as:
> You see a whiskey on the floor.
> You see a bucket on the floor.
>
> Maybe it does not work in all cases: so I need to do some testing.
> Let change the rest also to keywords.
>
It seems to work. The only 'problem' is that I
need to use:
(pickup :bucket)
instead of:
(pickup 'bucket)
But that is only temporary, because there will be an optimisation later on.
> On Wed, Jul 9, 2014 at 9:28 AM, Cecil Westerhof <[email protected]>
>> wrote:
>>
>>> 2014-07-09 17:18 GMT+02:00 Thomas Heller <[email protected]>:
>>>
>>> Oh and its rare (outside of macros) to use symbols like that. Usually
>>>> you'd use keywords.
>>>>
>>>> (def object-locations
>>>> {:whiskey :living-room})
>>>>
>>>
>>> It is from 'Land of Lisp'. The symbols are printed. Or is it possible
>>> to print the keyword without the :?
>>>
>>>
>>>
>>>> On Wed, Jul 9, 2014 at 5:03 PM, Thomas Heller <[email protected]>
>>>> wrote:
>>>>
>>>>> Short and simple answer: NullPointerException
>>>>>
>>>>> (def object-locations nil)
>>>>>
>>>>> (object-locations 'bucket) will throw
>>>>> ('bucket object-locations) => nil
>>>>>
>>>>> HTH,
>>>>> /thomas
>>>>>
>>>>> On Wednesday, July 9, 2014 3:48:53 PM UTC+2, Cecil Westerhof wrote:
>>>>>>
>>>>>> When you have:
>>>>>> (def object-locations {
>>>>>> 'whiskey 'living-room
>>>>>> 'bucket 'living-room
>>>>>> 'chain 'garden
>>>>>> 'frog 'garden
>>>>>> 'dummy 'nowhere
>>>>>> 'test 'nowhere
>>>>>> })
>>>>>>
>>>>>> You can retrieve the location of the bucket with:
>>>>>> (object-locations 'bucket)
>>>>>> and with:
>>>>>> ('bucket object-locations)
>>>>>>
>>>>>> Personally I find the first better, but ‘Clojure Programming' uses
>>>>>> the second possibility. What is the better way and why?
>>>>>>
>>>>>
--
Cecil Westerhof
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