542 questions
After restarting the ec2 instance, the following error occurred: MISCONF Redis is configured to save RDB snapshots, but is currently not possible to persist on disk. Commands that may modify the data ...
For example, for many-to-many models of User and Group, there is an intermediate table User_Group.When creating a group, how do I validate that user_group keeps at least one record, i.e., it must be l...
I'd like to ask for the number of change bills and coins.I want to solve it with Ruby, but I don't know how to do it.The results of a 468 yen purchase and a 10,000 yen bill are as follows.Number of 5,...
app/assets/stylesheets/style.css.scss has the following definitions:@each$color in red, purple, blue, green, yellow, orange { .c_#{$color}{ color:$color; }}The style is applied, but the following warn...
How do I organize a two-dimensional array with a person name in the array [0] and a score in the array [1]? score=[[taro, 10],[taro, 70],[taro, 170],[jiro, 90],[jiro, 55]]Desired Output taro=>250ji...
Prerequisites/What you want to achieveRuby uses an external API to create a web application that allows you to check the pickup status of the delivery.I was able to link the API, but I don't know wher...
Nice to meet you.When you deploy device in Ruby on Rails and access localhost:3000/login, you get the error ActionController::UrlGenerationError in Device::Sessions#new.Specifically, an error occurred...
Do you want to improve this question?Edit this post and update the question to focus on one issueClosed 3 years ago.Three years agoI would like to create a program like the one below.1. You must be ab...
I am currently creating my own application.mini_magic was bundle install to post, resize, and paste the image on the page.When application.scss describes @import,Sass::SyntaxErrorFile to import not fo...
Line 1second lineline threeline fourline fiveline sixline sevenline eightline nineline 10line 11line 12line 13line 14line 15line 16line 17in response to the sentence 1st to 15th lines first I want to ...
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