What are some advanced examples of Ruby lambdas?

What are some advanced examples of Ruby lambdas?

Ruby lambdas are anonymous functions that can be stored in variables. One advanced example is using lambdas for functional programming techniques, like map and reduce.

Can you show me a practical use case for lambdas?

Sure! You can use a lambda to filter an array. For example, filter = ->(x) { x.even? }; [1, 2, 3, 4].select(&filter) will return [2, 4].

What about using lambdas with class methods?

You can define a class method that takes a lambda as an argument. For instance, class MyClass; def self.apply_lambda(lam, value); lam.call(value); end; end allows you to pass any lambda to apply_lambda.

Are there any performance considerations when using lambdas?

Yes, while lambdas are powerful, they can introduce overhead. It's important to use them judiciously, especially in performance-critical code.