Hi Subbu,

here, regular message sends are more flexible than using #isKindOf: (or #includesBehavior:). Any class in the hierarchy can choose to answer to "is*" messages. That's not that easy with #isKindOf:, which depends on the subclass structure, which is hard to "fake" for a specific instance. I suppose that overriding #isKindOf: would be possible but troublesome...

Here is more on this topic:
http://forum.world.st/isKindOf-in-Morphic-code-tp4904890p4904965.html [http://forum.world.st/isKindOf-in-Morphic-code-tp4904890p4904965.html]
http://forum.world.st/isKindOf-in-Morphic-code-tp4904890p4904935.html [http://forum.world.st/isKindOf-in-Morphic-code-tp4904890p4904935.html]

Best,
Marcel 
Am 08.05.2019 18:10:52 schrieb K K Subbu <kksubbu.ml at gmail.com>:
This can lead to an explosion in methods. How about catching the pattern
in DNU and returning true for isObject and false for any selector
matching 'is[A-Z]*' or the more specific 'is'?

Regards .. Subbu

On 08/05/19 11:27 AM, Marcel Taeumel wrote:
> +1 for consistency :-)
>
> We should add more tests for isNumber, isCollection, isBoolean ... to
> document the intended use.
>
> Best,
> Marcel
>>
>> Am 08.05.2019 01:36:16 schrieb commits at source.squeak.org
>> :
>>
>> Chris Muller uploaded a new version of Kernel to project The Inbox:
>> http://source.squeak.org/inbox/Kernel-cmm.1228.mcz
>>
>> ==================== Summary ====================
>>
>> Name: Kernel-cmm.1228
>> Author: cmm
>> Time: 7 May 2019, 6:36:01.955169 pm
>> UUID: 2fad2a41-3aec-4e22-b9e8-cce50f7f6808
>> Ancestors: Kernel-nice.1227
>>
>> Allow identification of instances of Boolean via #isBoolean.
>>
>> =============== Diff against Kernel-nice.1227 ===============
>>
>> Item was added:
>> + ----- Method: Boolean>>isBoolean (in category 'testing') -----
>> + isBoolean
>> + ^ true!
>>
>> Item was added:
>> + ----- Method: Object>>isBoolean (in category 'testing') -----
>> + isBoolean
>> + ^ false!
>>
>>
>
>

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