smalltalk - Checking for the presence of a class -


i check if particular class has been loaded. 

smalltalk at: #tabularxslxexport  ifnone: [ ]

this not lead result in pharo. how do this?

i think method you're looking #at:ifabsent: (not #at:ifnone:).

so, inspecting result of

smalltalk at: #string ifabsent: [ nil ]

will let inspect string class, while

smalltalk at: #strign ifabsent: [ nil ]

will open inspector on nil (note "strign" deliberate misspelling of "string" lookup fails).

edit: max leske points out in comments, #hasclassnamed: more suitable method if you're trying determine whether class exists, , not interested in class being returned.


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