You have two arrays representing user IDs: active_users = [1, 2, 3, 4, 5] and premium_users = [3, 4, 6, 7]. How do you find users who are active but not premium?

hard📝 Application Q8 of 15

Ruby - Arrays

You have two arrays representing user IDs: active_users = [1, 2, 3, 4, 5] and premium_users = [3, 4, 6, 7]. How do you find users who are active but not premium?

Aactive_users & premium_users

Bactive_users - premium_users

Cactive_users | premium_users

Dpremium_users - active_users

Step-by-Step Solution

Solution:

Step 1: Understand the problem
We want users in active_users who are NOT in premium_users.
Step 2: Use array difference
The - operator removes elements of the second array from the first, giving non-premium active users.
Final Answer:
Use active_users - premium_users to find active but not premium users -> Option B
Quick Check:
Find difference with - operator [OK]

Quick Trick: Subtract premium from active to find non-premium active users [OK]

Common Mistakes:

Using & for difference
Using | for difference
Subtracting active from premium

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More Ruby Quizzes

You have two arrays representing user IDs: active_users = [1, 2, 3, 4, 5] and premium_users = [3, 4, 6, 7]. How do you find users who are active but not premium?

Step 1: Understand the problem

Step 2: Use array difference

Final Answer:

Quick Check:

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