Many times when we are developing an application using Ruby, we want to run a shell script to do certain task. For example, imagine that I have a script do_something.py which performs a very complex calculation and returns the result. From the extension, you can easily guess that
git
Github, Bitbucket or Gitlab are common git servers you have heard of. But do you know that you can also create your own git server with just a few lines of commands? Today I'm going to show you how to do that. In this post, I am assuming
rails
A few days ago, one member in my lab and I were about to finish a project together. We also used git server for sharing code and collaborate. However, when I used combination of git fetch, git stash, git rebase and git stash apply to fetch new code, he said
rails
Running the app in development or staging environment is a lot easier than production environment. There are so many unexpected factors which make your application unstable in production, such as a high number of concurrent users, lots of queries to database, etc. And when something go wrong on production app,
rails
Data consistency is very important in many applications, especially for application related to finance, banking, etc. A small error could become a tragedy if we do not treat it seriously. This time, I am going to talk a bit about Locking and how you can use it to protect data
rails
Nginx is now becoming the favorable choice of many Rails developers when deploying the Rails app. It is lightweight, fast and has almost everything we need. In this post, I am going to introduce a few useful configs which I often use in Rails app. 1. Redirect www to non-www
Performance is always a headache in web development. Sooner or later in the life cycle of your application, you will need to tune up the app to make it run faster, to be able to serve more users simultaneously or just to make sure it does not eat up all
regex
We might have been using Regex in all sort of tasks like splitting, replacing or matching strings. But you might not know one powerful feature of Regex which can really help you in many cases that you thought Regex is impossible. And today, we are going to talk about lookbehind
git
Today, I am going to introduce a technique to easily find out the first bad commit in your git repository. With this technique, you can save a lot of time debugging a code introduced by certain commit. Let's get started! First, assume that we have the following commits
rails
Callbacks are great and many business rules are often implemented in those callbacks to maintain data consistency and perform useful actions in app. As you might know, we can define several kinds of callbacks in ActiveRecord model, refer to the following guide for more detailed information: http://guides.rubyonrails.org/
html
Unlike other form controls such as textbox, checkbox or radio button, you'll find it hard to customize file upload control. The look and feel of this control is totally managed by the rendering browser. A simple customization like changing the button color or remove the text "Choose
rails
When installing new gem for Rails application, you expect to run simple command bundle install and hopefully all gems in Gemfile will be installed in your machine. Unfortunately, that is not always the case. It is because many gems require a specific library to be pre-installed. In this post, I
rails
In this tutorial, I am going to show you how to setup your server to run Rails application on Nginx with Puma server, and how to deploy the app with Mina tool. 1. Installing Ruby ==== First, we need to install some dependencies for Ruby sudo apt-get update sudo apt-get install
css
If you are using CloudFront for hosting static assets and having trouble with the CORS which prevents the icons from displaying properly on your website, in this post, I am going to show how to resolve this issue. As you have already known, the main cause of CORS issue is
deployment
If you are a web developer, there is one thing to which you should pay attention: Static assets on your hosts should be cached by the browsers if it does not change very often. More specifically, when you request the assets (CSS + JS) for the first time, the files will
rails
This week, I would like to introduce a gem which is being used in almost every project I have been working on. And it becomes more important for us nowadays because everyone want their website to be SEO efficiently. Link: https://github.com/norman/friendly_id Developed by: Norman Clarke