Time to Live (TTL) indexes are special single-field indexes in MongoDB that help delete documents from a collection after a specific amount of time or at a given clock time. Data expiration is useful for certain types of information like machine generated event data, shopping carts, logs, and session information etc that only need to persist in a database for a finite amount of time.

MongoDB Compass, as of 2018, comes with an aggregation pipeline builder to help make prototyping and debugging easier. This feature allows developers to export their aggregations into different programming languages and use the code in their applications.

Critical infrastructure like databases, application servers etc must be deployed securely in AWS and deploying ec2 instances in private subnet is a must. Instances launched in a private subnet have only private ip address (No public IP) and hence these instances can never be reached from internet.

This is a beginner’s guide to setup Macbook for web development. The motivation for writing this guide is to help people get started with programming on a Mac, and as also a personal reference for myself.

Mobile number has become the defacto user authentication mechanism in India and hence, OTP generation is a very common use case. otp-gen-agent is a Nano ID based small utility lib to generate OTP (one time password).