proc_vs_lambda_argument_handling

🎯 Proc vs Lambda: Argument Handling

Procs are lenient with arguments (extra ones are ignored, missing ones are nil), while lambdas enforce the exact number of parameters. Choose lambdas when you want strict checks and procs when you need flexibility.

flexible = Proc.new { |a, b| puts "a=#{a}, b=#{b}" }
strict   = ->(a, b) { puts "a=#{a}, b=#{b}" }

flexible.call(1)    # => a=1, b=
# strict.call(1)    # ArgumentError: wrong number of arguments (given 1, expected 2)

🎯 Proc vs Lambda: Argument Handling​

🎯 Proc vs Lambda: Argument Handling