When i try to add results of average operation to an array, i get strange output-CodePudding

I have three models, directors, movies, and ratings. These are their relations: A director has_many movies, a movie belongs_to a director, a movie has_many ratings and a rating belongs_to a movie.

I'm currently trying to display a director's best-rated movie to display on a _director.html.erb patrial, so I tried this code:

<% array = [] %>
<% rat_val = 0 %>
  <% director.movies.each do |movie| %>
     <% if movie.ratings.count > 0 %>
        <% director.movies.each do |movie| %>
           <% rat_val = movie.ratings.average(:value).round(2) %>
           <% array << rat_val %>
        <% end %>
        <%= array %>
        <% break %>
      <% end %>
   <% end %>

to get the overall rating of a movie as a single value to an array, so I could then take the biggest value, then find a director's movie with the same rating and display its name and the rating itself, but with <% array %> the output is [0.475e1, 0.438e1], which has the correct numbers, but somehow the decimal point is higher than it should be, the correct results are 4.75 and 4.38. Also, I have no idea what e1 means, if anyone could enlighten me, I'd be grateful.

CodePudding user response：

0.475e1 is 4.75

Type it into your rails (or plain ruby) console and see.

The e1 is part of scientific notation or e-notation. 0.123e2 stands for 12.3

0.123 * 10**2
0.123 * 100
12.3

It's a display issue.