Which of the following is the correct syntax to use map with a block to add 3 to each element in array [1, 2, 3]?

easy📝 Syntax Q3 of 15

Ruby - Enumerable and Collection Processing

Which of the following is the correct syntax to use map with a block to add 3 to each element in array [1, 2, 3]?

A[1, 2, 3].map(x) -> x + 3

B[1, 2, 3].map { |x| x + 3 }

C[1, 2, 3].map do x + 3 end

D[1, 2, 3].map { x + 3 }

Step-by-Step Solution

Solution:

Step 1: Identify correct block syntax for map
The block must take a parameter with vertical bars: { |x| ... }.
Step 2: Check each option's syntax
[1, 2, 3].map { |x| x + 3 } uses correct block syntax. Others have syntax errors or missing block parameter.
Final Answer:
[1, 2, 3].map { |x| x + 3 } -> Option B
Quick Check:
map block syntax with |var| [OK]

Quick Trick: Use {|var| ...} for map blocks in Ruby [OK]

Common Mistakes:

Master "Enumerable and Collection Processing" in Ruby

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Ruby Quizzes