Love U Ruby wrote in post #1108785:
> I was trying to list the all the class names having the pattern `stri`
> with the below:
>
> p ObjectSpace.each_object(Class).to_a.grep(/(stri)/i) #=> []
>
> But not getting the output. So can anyone help me on the same?
ObjectSpace.each_object(Class) is returning an Enumerator of Class
object. Then you are shoving a bunch of class objects into an array and
then expecting grep to know what to do with them.
If you were to run:
irb(main):> ObjectSpace.each_object(Class) { |x| p x.class }
Class
Class
Class
...
...
...
=> 383
Calling to_a on that Enumerator you get an array of Class objects, NOT
strings. When sending the grep message to an Array return any elements
where Pattern === element.
What you probably want instead is an array of class names as strings not
Class objects. Then grep should work just fine.
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