If you like the straight forward and effective nature of Strong Parameters

The rules for finding the arity of the methods are as follows:

The **nil argument was added in Ruby 2.7 to explicity mark that the method accepts no keyword arguments.

Returns an indication of the number of arguments accepted by a method. Returns a nonnegative integer for methods that take a fixed number of arguments. For Ruby methods that take a variable number of arguments, returns -n-1, where n is the number of required arguments. Keyword arguments will be considered as a single additional argument, that argument being mandatory if any keyword argument is mandatory. For methods written in C, returns -1 if the call takes a variable number of arguments.

It's a good practice to create respond_to_missing? if you are overriding method_missing. That way, the class will tell you the method you are calling exists, even though it's not explicitly declared.

Without respond_to_missing? defined, trying to get the method via method will fail:

In TypeScript, we can also set a value that a parameter will be assigned if the user does not provide one, or if the user passes undefined in its place.

buildName(undefined, "Adams")

If a default-initialized parameter comes before a required parameter, users need to explicitly pass undefined to get the default initialized value.

CoffeeScript is to Ruby as TypeScript is to Java/C#/C++.

If you love Ruby, you'll enjoy CoffeeScript as it makes the JavaScript more like the Ruby.

Open3.capture2e

require 'active_record/connection_adapters/postgis_adapter/railtie'

require 'active_record/connection_adapters/postgis/railtie'

with another instance as its receiver

まぶた）

Up for a Challenge?

Just to focus on the differences between lambdas and Procs, a lambda acts more like a real method. What does that mean?

When you create your own function to accept procs, the guts need to change a little bit because you'll need to use #call instead of yield inside (because which proc would yield run if you had more than one?).

Use that block of code (now called a Proc) as an input to a function by prepending it with an apersand &