Ruby - Arrays
What is the output of the following Ruby code?
arr = [1, [2, 3], [4, [5]]] puts arr.flatten.length
What is the output of the following Ruby code?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Apply
The nested arrayflattento the array[1, [2, 3], [4, [5]]]becomes[1, 2, 3, 4, 5]after flattening.Step 2: Calculate the length of the flattened array
The flattened array has 5 elements, solengthreturns 5.Final Answer:
5 -> Option AQuick Check:
Flattened array length = 5 [OK]
Quick Trick: Flatten first, then count elements with length [OK]
Common Mistakes:
MISTAKES- Counting nested arrays as single elements
- Forgetting flatten changes nested arrays
- Miscounting elements after flatten
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