Ruby should i use return

Wouldn't it be nice if we were able to tell the gem "Just skip facebook, and keep on going down the list of APIs to post to. NOTE: Of course the real solution to this problem is to re-architect the social media library. But this is far from the only use-case for the techniques I'm going to show you. Continuations tend to scare people. But that's just because they're not used very frequently and they look a little odd. But once you understand the basics they're really quite simple.

A continuation is like a "save point" in your code, just like in a video game. You can go off and do other things, then jump back to the save point and everything will be as you left it. We use the callcc method to create a Continuation object. There's no clean OO syntax for this.

The first time the continuation variable is assigned, it is set to the return value of callcc 's block. That's why the block has to be there. Each time we jump back to the savepoint, the continuation variable is assigned whatever argument we pass the call method. That's why we use the weird looking continuation. We're going to use continuations to add an skip method to to all exceptions. The example below shows how it should work.

Returning exits your method. I struggled with all of the above. Is there a better way to teach beginners? Seeing something printed to the console IS totally satisfying, and provides immediate feedback, but then again, so do error messages. Powered by Jekyll. Return Values in Ruby: implicit, explicit, and puts, print, p April 10, 5 Minute Read I 've been working a lot with people who are new to Ruby and new to programming altogether , and a common theme is not understanding the values that are returned from Ruby methods, or that anything is returned at all, and what all this "return" business is all about.

This gives alias to methods or global variables. Aliases cannot be defined within the method body. The alias of the method keeps the current definition of the method, even when methods are overridden. Overriding the built-in global variables may cause serious problems.

By using undef and alias , the interface of the class can be modified independently from the superclass, but notice it may be broke programs by the internal method call to self. Ruby - Methods Advertisements. Previous Page. Next Page. If a while modifier follows a begin statement with no rescue or ensure clauses, code is executed once before conditional is evaluated.

Executes code while conditional is false. An until statement's conditional is separated from code by the reserved word do , a newline, or a semicolon. If an until modifier follows a begin statement with no rescue or ensure clauses, code is executed once before conditional is evaluated.

Here, we have defined the range The statement for i in