What are Ruby Lambda functions and how do I use them?

What are Ruby Lambda functions and how do I use them?

Ruby Lambda functions are anonymous functions that can be stored in variables and passed around like any other object. They are defined using the lambda keyword or the -> syntax.

Can you give me an example of a Ruby Lambda function?

Sure! Here's a simple example:

my_lambda = lambda { |x| x * 2 }
puts my_lambda.call(5)  # Output: 10

How do Ruby Lambda functions differ from Procs?

The main difference is that Lambdas check the number of arguments passed, while Procs do not. If you pass the wrong number of arguments to a Lambda, it will raise an error.

When should I use a Lambda instead of a Proc?

Use a Lambda when you need strict argument checking and want to maintain the return behavior of the method. Procs are more flexible.