When should I use lambdas in Ruby?

When should I use lambdas in Ruby?

Lambdas in Ruby are useful for creating anonymous functions. You should use them when you need a block of code that can be passed around as an object.

Can you give me an example of a lambda in Ruby?

Sure! Here's a simple example: my_lambda = ->(x) { x * 2 }. You can call it with my_lambda.call(5) to get 10.

What’s the difference between a lambda and a proc?

The main difference is that lambdas check the number of arguments, while procs do not. If you pass the wrong number of arguments to a lambda, it will raise an error.

Are there any performance considerations when using lambdas?

Generally, lambdas are slightly slower than regular methods due to the overhead of creating an anonymous function, but the difference is often negligible.