Which of the following is the correct syntax to create a lambda in Ruby?

easy📝 Syntax Q12 of 15

Ruby - Blocks, Procs, and Lambdas

Alambda = Proc.new { |x| x * 2 }

Blambda = proc { |x| x * 2 }

Clambda = ->(x) { x * 2 }

Dlambda = lambda.new { |x| x * 2 }

Step-by-Step Solution

Solution:

Step 1: Identify lambda creation syntax
In Ruby, lambdas can be created using the literal syntax ->(args) { block } or lambda { block }. The arrow syntax is common and concise.
Step 2: Check each option
lambda = Proc.new { |x| x * 2 } creates a Proc, not a lambda. lambda = ->(x) { x * 2 } uses the correct lambda literal syntax. lambda = proc { |x| x * 2 } creates a Proc using proc. lambda = lambda.new { |x| x * 2 } is invalid syntax.
Final Answer:
lambda = ->(x) { x * 2 } -> Option C
Quick Check:
Lambda syntax = ->(args) { block } [OK]

Quick Trick: Use ->(args) { } for lambda, Proc.new or proc for Proc [OK]

Common Mistakes:

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