What are promises?

Are a great abstraction to handle syncronous calls, per example when you are waiting the answer from an api, you either can get a correct answer or an…

This are an alternative to positioning arguments, until ruby 2.0 we didn’t hat support for the ruby keyword arguments, unless you pass a hash, but this was a hack.

The advantages of using this are, that from the calling code you can see which parameters are you…

Either if you want to grant access to your servers to someone else on your team or just deploy an application with capistrano or chef, you need to setup the password-less ssh access to your server, you can do it with this simple steps:

sudo apt-get update…

With elastic beanstalk we can deploy our rails app really easy, after the initial configuration you can deploy your app on one command

First steps

Instead of asking the internal state of an object just let it to decide what to do with the message.

Pros:

• The data and the methods are together on the same place.
• It’s easier to change everything because they are together.