hadrienblanc

# Returns nils and strings
Model.where(:url.ne => "").count 

# Returns strings and ""
Model.where(:url.ne => nil).count

# Returns strings, nils and ""
Model.where(:url.ne => ["", nil]).count 

Model.where(:url.nin => ["", nil]).count

hadrienblanc

Fizz Buzz ruby

Objective

Write a fonction or an object of your design called FizzBuz that takes input integer n and prints all the numbers from 1 up to n in a new line.

• if the number is divisible by 3 then print "Fizz"
• if the number is divisible by 5 then print "Buzz"
• if the number is divisible by both 3 and 5, print "FizzBuzz". Otherwise just print the number.

hadrienblanc

Assuming that total_seconds = 3600

Option 1:

distance_of_time_in_words(total_seconds) #=> "about 1 hour"

Option 2:

Time.at(total_seconds).utc.strftime("%H:%M:%S") #=> "01:00:00"

hadrienblanc

x = [1, 1, 2, 4]
y = [1, 2, 2, 2]

# intersection
x & y            # => [1, 2]

# union
x | y            # => [1, 2, 4]

# difference

hadrienblanc

heroku config:get TZ -a heroku_app_name  
heroku config:add TZ=Paris  -a heroku_app_name

hadrienblanc

heroku builds:cancel BUILD_ID -a application

hadrienblanc

class Testo

  def run
    puts "hello world !"
    puts my_var
    puts my_var
    puts my_var
  end

hadrienblanc

class BundleDeleteService
    def initialize(relative_path:)
      @relative_path = relative_path
    end

    def delete
      bucket_objects.each(&:delete)
    end

    def bucket_objects

hadrienblanc

TimeZone (and Rails)

UTC : What is that ?

https://en.wikipedia.org/wiki/ISO_8601 ISO 8601 describes representation of dates and times as an international standard

Time zones in ISO 8601 are represented as local time (with the location unspecified), as UTC, or as an offset from UTC.

Z ?

hadrienblanc

Model.where('created_at >= ?', Time.zone.now.beginning_of_day)