Not Just Copy-Pasting From Stack Overflow But Understanding What You’re Copy-Pasting. — What This Tutorial Is About Elasticsearch is the go-to search engine these days, but its Query DSL does have a steep learning curve. When I first started writing Elasticsearch queries, I could string together something that worked through a combination of the Elastic.co docs and Stack Overflow, but I didn’t fully understand the underlying concepts…

Or How to Stop Worrying When You See Timeouts and Learn to Love These Techniques — What Does it Mean to Optimize and Scale a MySQL Web Application? Ask an application developer, a database admin, and a DevOps engineer what it means to “optimize and scale MySQL” and you’ll probably get three different answers. This article presents techniques from all three of these perspectives. …

It Just Depends on What you Define as the Resource — A GET Request With Too Many or Too Complex Query Parameters A problem I’ve encounter in API design is making a GET request with too many query parameters, something that looks like: GET /api/v1/movies?criteria1=value1&criteria2=value2&criteria3=value3& criteria4=value4&criteria5=value5&criteria6=value6& criteria7=value7&criteria8=value8&criteria9=value9

Good Things To Know For React Developers — When to Bind Component Methods When a React Component’s method uses this , we need to be careful what this refers to. Namely, we want this to refer to the Component instance itself. This means we have to sometimes manually bind the function to the Component instance, but when? Bind When Not Using Arrow Functions If a Component was created using…

The redux-thunk source code is only 14 lines long (sans test and configuration files). It’s just: It’s so short but powerful that it’s definitely worth trying to understand. In this article, we will try to understand how each line (all 14!) of the library works. In doing so, it…

With Examples in Active Record — What is Single Table Inheritance In the context of object oriented programming where objects are persisted in a relational database, single table inheritance (STI) is defined as multiple subclasses sharing a single database table. Rails supports STI right out of the box simply by inheriting subclasses from an ActiveRecord parent class which has a type…

For Web Devs Who Copy-Paste Nginx Configurations But Want to Know What They’re Copying — Serving Static Files Here’s an example of an nginx configuration for serving static files like images, CSS files, and Javascript files. The main configuration file lives in /etc/nginx/nginx.conf and will look like this: Since we are will have only one virtual host, we only have /etc/nginx/sites-enabled/staticcontent.com.conf which will look like:

An Open Question to the Web Dev Community on the HTTP API Definition of RESTful Versus Roy Fielding’s Dissertation’s Definition of REST — What are RESTful APIs? Seems like most web application developers would agree that the following properties define a RESTful API: 1. It follows the “proper” use of HTTP methods The GET method is used for idempotent non-state-altering requests for fetching resources at a given URI.

Simple But Effective Ways To Improve Active Record Query Performance — Eager Loading With `includes` to Avoid n+1 Queries Use includes to avoid n+1 queries. For example, if there are n rows in the users table, the following ActiveRecord code would generate n+1 queries: However, using includes will only run 2 queries. One to load all the users, and another to load all posts associated with those users.