Ruby - Basics and Runtime
What will the following Ruby code output?
arr = [1, 2, 3]
puts arr.map { |x| x * 2 }What will the following Ruby code output?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand map and puts behavior
arr.map returns a new array [2,4,6]. puts prints each element on a new line.Step 2: Predict output format
puts on an array prints each element on its own line, so output is 2, then 4, then 6 on separate lines.Final Answer:
2 4 6 -> Option AQuick Check:
puts array = elements printed line by line [OK]
Quick Trick: puts array prints each element on a new line [OK]
Common Mistakes:
MISTAKES- Expecting array brackets in output
- Thinking puts prints array as string
- Assuming map is undefined
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