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What does it mean to reopen a class in Ruby?

easy📝 Conceptual Q11 of 15
Ruby - Class Methods and Variables
What does it mean to reopen a class in Ruby?
AYou write the class again to add or change methods without deleting the original.
BYou create a new class with the same name but different methods.
CYou delete the old class and replace it with a new one.
DYou make a copy of the class and modify the copy only.
Step-by-Step Solution
Solution:

  1. Step 1: Understand Ruby class behavior

    In Ruby, classes are open, meaning you can write the class again to add or change methods.

  2. Step 2: Identify what reopening means

    Reopening a class means modifying the existing class by adding or replacing methods without deleting it.

  3. Final Answer:

    You write the class again to add or change methods without deleting the original. -> Option A

  4. Quick Check:

    Reopen class = add/change methods anytime [OK]
Quick Trick: Reopen means add or change methods by rewriting class [OK]
Common Mistakes:
  • Thinking reopening creates a new separate class
  • Assuming reopening deletes the old class
  • Confusing reopening with copying a class

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