Ruby If Nil Else

In ruby only nil and false are falsey.

Ruby if nil else. What do they return. That means they return something. Well nil is also its own class.

Def initial response if condition responses to a first end end so we can further refactor. Let s evaluate their usefulness and potential problems that they bring to the table. Will only return true if the. Def initial response if condition responses to a first else nil end end can be simplified to.

If the conditional is not true code specified in the else clause is executed. When you write a boolean expression like. For many beginning rubyists especially those having experience in other programming languages such as java or c checking whether variable is nil may seem a little bit confusing. Executes code if the conditional is true.

Ruby remember your first day of learning ruby when you were told that pretty much everything is an object. There are plenty of options available. The values false and nil are false and everything else are true. You also learned that nil false are the only two things in ruby that are falsy.

Notice ruby uses elsif not else if nor elif. Logical boolean operators like and. In ruby on rails what s the difference actually. And even those speaking ruby quite fluently don t usually know the tiny little details.

Notice that we use two equal symbols to mean equality. But when you want to check for the opposite not true false. You learned that nil is just a ruby object that represents nothing. With an if statement you can check if something is true.

If response initial response do something with response else response is equal to nil end. Everything else is truthy. If you don t this right you won t get the expected results. September 11 2010 4 minute read tags.

Remember also that a ruby method returns nil by default. If you enjoyed this post don t forget to share it on your favorite social networks.