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.PHONY in Makefile

Understand how .PHONY directives ensure that commands execute even when corresponding files or directories exist

Sending HTTP requests with telnet

Learn how to send HTTP and HTTPS requests using Telnet and netcat.

Primary key column in PostgreSQL

Explore PostgreSQL's auto-generated primary keys: serial vs identity through their differences and advantages

Rendering ViewComponent from Rails form builder

Leverage the power of view components for constructing form elements in Ruby on Rails

Type casting in PostgreSQL using Arel

Learn how to use NamedFunction helper to convert between types in PostgreSQL

Find process listening on a port

Find the process in the operating system that is listening on a particular port.

Rails cache - key versioning

Explore the power of cache key versioning in Ruby on Rails to reducing data size in cache store.

Show Rake task details

Display Rake task details with Ruby

Ruby on Rails asset URL with fingerprint

Get URL to Ruby on Rails application asset files including their fingerprint

Pattern matching with Ruby

Pattern matching introduced in Ruby 2.7, allows for matching values against patterns and deconstructing their constituent parts.