What are some in-depth examples of Ruby Lambda functions?

What are some in-depth examples of Ruby Lambda functions?

Ruby Lambda functions are anonymous functions that can be used to encapsulate code. For example, you can create a simple lambda to add two numbers: add = ->(x, y) { x + y }. You can then call it with add.call(2, 3).

Can you give me more complex examples?

Sure! You can use lambdas for filtering arrays. For instance, numbers = [1, 2, 3, 4, 5]; evens = numbers.select(&->(n) { n.even? }) will return [2, 4].

How do they differ from regular methods?

Lambdas are more flexible and can be passed around as first-class objects, while methods are defined with a name and are less portable.

Are there any performance considerations?

Yes, lambdas can be slightly slower than methods due to the overhead of creating an anonymous function, but the difference is often negligible for most applications.