IMO Delegate in Ruby and Rails When a class is too bloated because all the requirements are packed, you probably want to split it up. When designing tables, you may want to normalize and split it into separate tables. There are the other w…

How to measure cohesion in Python What is Cohesion? Cohesion is a software metric that measures the proximity of related methods and variables. For example, in LCOM4, the functions accessing a variable in a class are traced and clustered. …

Reference for implementation Preface: Let's read open source implementations When you are doing web development, you may feel uneasy whether this way of writing is normal or not, or whether the direction of implementation is good or not. I…

Reading Twitter's internal structure. Introduction Microblogging services like Twitter have a lot of posts in a short period of time. Especially for the timeline, simply moving data in and out from the RDB will not scale. I found some arti…

Is GraphQL a silver bullet? Introduction In web and application development, there are various methods for passing data between servers and between server and clients. The most common are SOAP and XML in the past. In most cases, JSON REST …