Which of the following Ruby lambda definitions will cause a syntax error?

easy📝 Syntax Q3 of 15

Ruby - Blocks, Procs, and Lambdas

Amy_lambda = ->(x) { x + 1 }

Bmy_lambda = lambda do |x| x + 1 end

Cmy_lambda = lambda { |x| x + 1 }

Dmy_lambda = -> x { x + 1 }

Step-by-Step Solution

Solution:

Step 1: Review arrow lambda syntax rules
The arrow lambda syntax requires parentheses around parameters: ->(x) { ... }.
Step 2: Identify invalid syntax
my_lambda = -> x { x + 1 } misses parentheses around x, causing a syntax error. Other options are valid lambda definitions.
Final Answer:
my_lambda = -> x { x + 1 } -> Option D
Quick Check:
Arrow lambda needs parentheses = C [OK]

Quick Trick: Arrow lambdas need parentheses around parameters [OK]

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