After using Ruby on Rails 5 I do not want to go back, I’ve fell in love. In my opinion this was one of the best updates in software. My congratulations to the core team and all the contributors.
Bcrypt gem is included and it is not necessary the old manual configuration steps which spares a lot of time and makes us focused on other important things.
In some commands the old rake is gone, such as:
To build the API:
rails new tasks --api
Then you add this code to the Gemfile
After, you create this file and write the code that follows
ActiveModel::Serializer.config.adapter = :json_api
Run this command to update the gems
Create both Users and Todos using scaffold
rails generate scaffold User email
rails g scaffold Todo title completed:boolean order:integer category:string user:references
The scaffold option makes a lot of things for us but there is more work to do, some configuration, more code and in my case I added authentication.
The code can be checked in my github through the following link: https://github.com/Adnilson/tasks
Today I solved this algorithm that is the third problem in Project Euler.
This still need some improvement, because even when the last prime number is found it still counts and takes a really long time when given big numbers.
result = 0
(2...num).each do |i|
result = i if (num % i) == 0 && i.prime?
I will update this code as soon as I find a better solution but for now it works.
I’ve got this book last week. It’s the most expensive I’ve ever bought and I do not regret!
I am still in the beginning and learned what are Design Patterns, the catalog of the 23 design patterns in this book and how they solve problems. After, will be shown how to select and use a design pattern, a case study and then we delve into each one of the patterns. The authors explain Object Oriented Design and how objects interact with each other as an introduction.
The good thing about this is that the book has a guide and is suited for rookie readers which is awesome!
Why are solving algorithms Adnilson, shouldn’t you work on building applications? Yes, you are right! The thing with algorithms is that it helps you solve problems and are good to make your mind look for solutions. This way you build a blueprint and whenever you get a problem you tackle the problem instead of being tackled by it.
In Ruby things sometimes are too easy and today I will go back to school and review the bubble sort, this algorithm is not the most efficient way of sorting but is a simple and cool exercise.
In Ruby if you want to sort say, an array you can do it by doing array.sort and bam! There it is.
length = array.length - 1
swapped = false
(0...length).each do |i|
if array[i] > array[i+1]
array[i], array[i+1] = array[i+1], array[i]
swapped = true
break if !swapped
I guess the code speaks for itself. In a lower level language the program would have an extra variable to store the value of one of the array contents in order to swap.
The first time I did this was in Pascal, then Fortran in college.