The Ruby lambda tutorial

Similar to procs, lambdas allow you to store functions inside a variable and call the method from other parts of a program. In this lesson, we will discuss lambdas and show how to integrate them into a Ruby program.

To get started, I'll use the same example as the previous section, but with a different syntax.

full_name = lambda { |first, last| first + " " + last } 

You can also call lambdas in the same way as procs:

p full_name["jordan", "hudgens"] 

Notice that the implementation is nearly identical to using procs, with the only difference being the use of the lambda word instead of Proc.new.

Stabby lambdas

In real-world projects, it's a common practice to use a different syntax though: the stabby lambda. Here is how you can use stabby lambdas:

full_name = -> (first, last) { first + " " + last } 

If you run this code, it runs exactly the same way as the previous one.

Like procs, you can also run the lambdas with the call syntax:

p first_name.call("jordan", "hudgens") 

So...