Ruby - Operators and Expressions
How can you use the spaceship operator to sort an array of strings arr = ['apple', 'banana', 'cherry'] in reverse alphabetical order?
How can you use the spaceship operator to sort an array of strings arr = ['apple', 'banana', 'cherry'] in reverse alphabetical order?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand sorting with spaceship
To sort descending, compare b to a.Step 2: Use sort with block
Usearr.sort { |a, b| b <=> a }to reverse order.Final Answer:
arr.sort { |a, b| b <=> a } -> Option AQuick Check:
Reverse order swaps operands [OK]
Quick Trick: Swap operands for descending sort [OK]
Common Mistakes:
- Using a <=> b for descending order
- Misusing sort_by with spaceship
- Trying to reverse after sort with block
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