[Solved] Find the problem in this code snippet: arr = Array.new(3) { [] } arr[0] — Ans: No problem, output is [[10], [], []] | Ruby

Ruby - Arrays

Find the problem in this code snippet:

arr = Array.new(3) { [] }
arr[0] << 10
puts arr.inspect

AAll arrays share same object

BNo problem, output is [[10], [], []]

CSyntax error in Array.new block

DOutput is [[], [], []]

Step-by-Step Solution

Solution:

Step 1: Understand block form of Array.new
Array.new(3) { [] } creates 3 separate empty arrays, one per element.
Step 2: Modify first element
arr[0] << 10 adds 10 only to first array, others remain empty.
Final Answer:
No problem, output is [[10], [], []] -> Option B
Quick Check:
Block form creates unique objects per element [OK]

Quick Trick: Use block to create unique objects in array [OK]

Common Mistakes:

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