In Ruby, I was able to execute strings as code like
eval("print 5")
Is it possible to do exactly the same in Objective-C?
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No. Objective-C is a compiled language. To evaluate strings like that, there would have to be a compiler embedded in the runtime, and there isn’t.
There is a limited form of executing strings using methods like
-performSelectorandvalueForKey:andNSInvocation.