Ruby - Class Methods and Variables
What is the main purpose of using
class instance variables in Ruby?What is the main purpose of using class instance variables in Ruby?
easy📝 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Understand class instance variables
Class instance variables belong to the class object itself, not to each instance.Step 2: Compare with instance variables
Instance variables store data unique to each object, while class instance variables store data unique to the class object, not shared with instances.Final Answer:
To store data shared by the class itself, not by individual objects -> Option AQuick Check:
Class instance variables = data for the class object [OK]
Quick Trick: Class instance variables hold data for the class, not objects [OK]
Common Mistakes:
- Confusing class instance variables with instance variables
- Thinking class instance variables are global variables
- Assuming class instance variables are shared with subclasses automatically
Master "Class Methods and Variables" in Ruby
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