Solution:Step 1: Analyze method behaviorMethod doubles each element, then yields to block which adds 1.Step 2: Calculate each transformed elementFor 1: 1*2=2, block adds 1 -> 3; for 2: 4+1=5; for 3: 6+1=7.Final Answer:[3, 5, 7] -> Option CQuick Check:Block modifies doubled values [OK]

[Solved] Consider this code:def transform(arr) arr.map { |x| yield x * 2 } end result = transform([1, 2, 3]) { |n| n + 1 } puts result.inspectWhat is the output? | Ruby

Ruby - Blocks, Procs, and Lambdas

Consider this code:

def transform(arr)
  arr.map { |x| yield x * 2 }
end
result = transform([1, 2, 3]) { |n| n + 1 }
puts result.inspect

What is the output?

A[1, 2, 3]

B[2, 4, 6]

C[3, 5, 7]

DError: no block given

Step-by-Step Solution

Solution:

Step 1: Analyze method behavior
Method doubles each element, then yields to block which adds 1.
Step 2: Calculate each transformed element
For 1: 1*2=2, block adds 1 -> 3; for 2: 4+1=5; for 3: 6+1=7.
Final Answer:
[3, 5, 7] -> Option C
Quick Check:
Block modifies doubled values [OK]

Quick Trick: Block transforms each doubled element [OK]

Common Mistakes:

Ignoring block addition
Confusing map with each
Expecting original array

Master "Blocks, Procs, and Lambdas" in Ruby

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More Ruby Quizzes

Consider this code:

Step 1: Analyze method behavior

Step 2: Calculate each transformed element

Final Answer:

Quick Check:

Want More Practice?