Ruby - Blocks, Procs, and Lambdas
What will this Ruby code output?
words = ['cat', 'dog']
words.each { |w| puts w.upcase }What will this Ruby code output?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Identify block parameter and method
Each word w is converted to uppercase using upcase method inside the block.Step 2: Determine output
Outputs are 'CAT' and 'DOG' printed on separate lines.Final Answer:
CAT DOG -> Option AQuick Check:
Block parameter transformed with upcase = CAT, DOG [OK]
Quick Trick: Use block parameter to call methods on each element [OK]
Common Mistakes:
- Printing original lowercase words
- Expecting array output instead of printed lines
- Mistaking method name or syntax
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