TILs - Fueling Curiosity, One Insight at a Time

The EXPLAIN statement provides information about how MySQL executes statements i.e MySQL explains how it would process the statement, including information about how tables are joined and in which order

For radio buttons, checkboxes ..., Materialize expects the input tag to appear before the label tag. Otherwise only the label will be rendered.

This is a pretty good read if one is setting up SSL on their own https://sanderknape.com/2016/06/getting-ssl-labs-rating-nginx/

Ruby by default has certain mutable and immutable object types. Booleans and numbers for example are immutable, and this in turn affects the way how a variable is passed to a method i.e pass by value or reference.

Ruby has a class called SimpleDelegator which can be used to used to implement decorator pattern. It can be used to delegate all supported method calls to the object passed into the constructor.

You can use a tool called [Telepresence](https://www.telepresence.io) to create a 2-way proxy between your local dev machine and a k8s cluster. Uses : be able to inherit env vars and other configs from k8s locally, make use of other services running in the cluster when running your dev instance of a service you want to test

Arel is a SQL abstract syntax tree manager for ruby. It helps to simplify creating complex SQL queries and interfaces with various RDBMS. Arel modifies it's AST nodes based on the methods you call on it and ActiveRecord makes use of this to build composable chainable queries and then executes them. A detailed post on Arel: https://jpospisil.com/2014/06/16/the-definitive-guide-to-arel-the-sql-manager-for-ruby.html

You can speed up image builds by making use "--cache-from". This is useful when 1) you already have a previous version of the image which you can pull 2) docker pull is faster than docker build 3) intermediate layers in the previous version can be reused. This is useful for speeding up builds in docker container builder

There is something called QoS for pods using which we can prevent unwanted rescheduling of pods