[Solved] What is the output of the following Ruby code? arr = Array.new(4) { |i| i * 2 } puts arr.inspect — Ans: [0, 2, 4, 6] | Ruby

Ruby - Arrays

What is the output of the following Ruby code?

arr = Array.new(4) { |i| i * 2 }
puts arr.inspect

A[nil, nil, nil, nil]

B[2, 4, 6, 8]

C[0, 2, 4, 6]

D[0, 0, 0, 0]

Step-by-Step Solution

Solution:

Step 1: Understand Array.new with block
When Array.new is called with a block, it runs the block for each index, passing the index as i.
Step 2: Calculate each element
For indices 0 to 3, the block returns i * 2: 0*2=0, 1*2=2, 2*2=4, 3*2=6.
Final Answer:
[0, 2, 4, 6] -> Option C
Quick Check:
Array with block fills elements by index * 2 [OK]

Quick Trick: Array.new with block uses index to set each element [OK]

Common Mistakes:

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