Rails Best Practices | Not use time_ago_in_words
It's very common for a rails developer to use time_ago_in_words to display time like "5 minutes ago", but it's too expensive to calculate the time in server side, you should utilize client cpu to calculate the time ago. Rails provides a helper method time_ago_in_words to display the distance between one time and now, like "5 minute ago", it's very useful. Before <%= times_ago_in_words(comment.cre
Rails Best Practices | Use memoization
Memoization is an optimization technique used primarily to speed up computer programs by having function calls avoid repeating the calculation of results for previously-processed inputs. In rails, you can easily use memoize which is inherited from ActiveSupport::Memoizable. Memoization is an optimization technique used primarily to speed up computer programs by having function call avoid repeat th
Rails Best Practices | Replace instance variable with local variable
In partial view, we can use the instance variable directly, but it may be confused and make it hard to reuse anywhere, because we don't know exactly which instance variable can be used, so use the local variable in partial with explicitly assignment. Bad Smell class PostsController < ApplicationController def show @post = Post.find(params[:id]) end end <%= render :partial => "sidebar" %> In this e
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Rails Best Practices - Rails Best Practices
