Ruby - Blocks, Procs, and Lambdas
What is the output of this Ruby code?
my_proc = proc { |x| x * 2 }
puts my_proc.call(7)What is the output of this Ruby code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the Proc's operation
The Proc multiplies the input by 2.Step 2: Calculate the output for input 7
7 * 2 equals 14, so the output is 14.Final Answer:
14 -> Option BQuick Check:
Proc call output = 14 [OK]
Quick Trick: Proc runs code with input, here doubling 7 gives 14 [OK]
Common Mistakes:
- Expecting the input itself as output
- Thinking Proc returns nil by default
- Assuming syntax error without reason
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