[Solved] What is the output of this Ruby code? words = ['apple', 'banana', 'avocado', 'blueberry'] groups = words.group_by { |w| w[0] } puts groups | Ruby

Ruby - Enumerable and Collection Processing

What is the output of this Ruby code?

words = ['apple', 'banana', 'avocado', 'blueberry']
groups = words.group_by { |w| w[0] }
puts groups

A[["a", ["apple", "avocado"]], ["b", ["banana", "blueberry"]]]

B["apple", "avocado", "banana", "blueberry"]

C{"apple"=>"a", "banana"=>"b"}

D{"a"=>["apple", "avocado"], "b"=>["banana", "blueberry"]}

Step-by-Step Solution

Solution:

Step 1: Understand group_by with first letter
The block groups words by their first character, so keys are 'a' and 'b'.
Step 2: Check output format of group_by
It returns a hash with keys as letters and values as arrays of words starting with that letter.
Final Answer:
{"a"=>["apple", "avocado"], "b"=>["banana", "blueberry"]} -> Option D
Quick Check:
group_by first char = hash with arrays [OK]

Quick Trick: group_by returns a hash, not an array or string [OK]

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