How can you extract a slice from arr = [1, 3, 5, 7, 9, 11] that includes every second element from index 0 to 5?

hard📝 Application Q9 of 15

Ruby - Arrays

How can you extract a slice from arr = [1, 3, 5, 7, 9, 11] that includes every second element from index 0 to 5?

Aarr[0..5].step(2).to_a

Barr[0..5].select.with_index { |_, i| i.even? }

Carr[0...6].select.with_index { |_, i| i % 2 == 1 }

Darr[0..5].filter.with_index { |_, i| i % 2 == 1 }

Step-by-Step Solution

Solution:

Step 1: Slice the array from index 0 to 5
Use arr[0..5] to get elements at indices 0 through 5.
Step 2: Select elements at even indices within the slice
Use select.with_index and check for even indices to get every second element.
Final Answer:
arr[0..5].select.with_index { |_, i| i.even? } -> Option B
Quick Check:
Use select.with_index to filter elements by index parity [OK]

Quick Trick: Use select.with_index to filter elements by index [OK]

Common Mistakes:

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