[Solved] Why does Array.new(3, []) cause unexpected behavior when modifying elements? — Ans: Because all elements reference the same array object | Ruby

Ruby - Arrays

Why does Array.new(3, []) cause unexpected behavior when modifying elements?

ABecause the syntax is invalid

BBecause Array.new cannot create arrays with default values

CBecause all elements reference the same array object

DBecause the array size must be specified as a block

Step-by-Step Solution

Solution:

Step 1: Understand default object behavior
Array.new(3, []) creates an array where all elements point to the same empty array object.
Step 2: Effect on modification
Modifying one element modifies all because they share the same object reference.
Final Answer:
Because all elements reference the same array object -> Option C
Quick Check:
Default object shared causes unexpected mutations [OK]

Quick Trick: Default objects are shared, use block for unique elements [OK]

Common Mistakes:

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Why does Array.new(3, []) cause unexpected behavior when modifying elements?