How to remove Docker files

I have been using docker for a while in a project and thank god it exists. There is no need in installing many project dependencies. In this case this is a Ruby on Rails 3 project, yes very old. Everything was fine until my root partition “/” was out of space! I thought to myself […]

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The importance of a Backup

Before I started working professionally as a software engineer, I would see a lot of people talking about the importance of backups in the IT industry. A few weeks ago I worked on a project that didn’t have any backups and was in production! The first thing I did was a backup and used the […]

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Heroku rollback

A while ago had a problem in a production server which I used Heroku’s rollback command, which goes back to the previous push/migration. When you run: heroku rollback It goes a step back in your commits/changes but upgrades the version. Current version = v33, after rollback¬†current version = 34. If for any reason rollback wasn’t […]

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Ruby cover? instead of include?

Last week I learned that we should use cover? instead of include?. When you ask a range if it includes something, ruby is going to instantiate every object within that range and then check if the object you pass into include? exists in there. If you ask cover? it’s just going to figure out and […]

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Uniqueness scope on boolean

Hey, It has been a long time since the last post. I was working in hospitality and running some Java. Now I am employed as a Web Developer. This week I bring you something ¬†I learned right now. We are building a Medicine web app. This application consists in medical cases and each case has […]

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Simple Array Sum

Ruby n = gets.strip.to_i arr = gets.strip arr = arr.split(‘ ‘).map(&:to_i) total = 0 arr.each {|num| total += num} puts total C int main(){ int n, total; scanf(“%d”,&n); int arr[n]; for(int i = 0; i < n; i++){ scanf(“%d”,&arr[i]); } for (int i = 0; i < n; i++){ total += arr[i]; } printf(“%d”, total); […]

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