blocks/Procs/lambdas/and Methods -my view

gistfile1.txt

* Blocks are simply Procs that can not be saved.
* Blocks should be used as a one-time solution. If 2 or more closures are being passed, use a Proc.

Use case examples:

1.) Block: method is breaking an object down into smaller pieces, and I want to let my users interact with these pieces.

2.) Block: I want to run multiple expressions atomically, eg: a database migration.

3.) Proc: I want to reuse a block of code multiple times.

4.) Proc: the method will have one of more callbacks.


lambdas

* Similar to Procs except:

1.) lambdas check the number of arguments passed.
2.) lambdas return their value to the method and let the method continue on.

* lambdas are another way to write methods  anonymously.


method Method

We can convert a Method object to a method and it will act just like a lambda except that it will be a named method vs lambdas being anonymous methods.

Main Point:
blocks and Procs act like drop-in code snippets.
lambdas and Methods act like methods.