Which of the following is the correct syntax to sort an array arr in descending order in Ruby?

easy📝 Syntax Q3 of 15

Ruby - Arrays

Which of the following is the correct syntax to sort an array arr in descending order in Ruby?

Aarr.sort.reverse

Barr.reverse.sort

Carr.sort! { |a, b| a <=> b }

Darr.sort { |a, b| b <=> a }

Step-by-Step Solution

Solution:

Step 1: Understand sorting with custom block
To sort descending, use sort with a block comparing b <=> a.
Step 2: Check each option
arr.sort.reverse sorts ascending then reverses, which works but is less efficient. arr.sort { |a, b| b <=> a } directly sorts descending using block.
Final Answer:
arr.sort { |a, b| b <=> a } -> Option D
Quick Check:
Descending sort uses sort with block b <=> a [OK]

Quick Trick: Use sort { |a,b| b <=> a } for descending sort [OK]

Common Mistakes:

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