PostgreSQL is a popular, free, open-source relational database that can be used for different workloads. Postgres provides querying abilities and windowing functions. Its versatility makes it possible to be used as a transactional
Ruby is an interpreted, high-level, general-purpose programming language designed with an emphasis on programming productivity and simplicity.
A software bug is an error that happens in an application causing it to return an invalid result or to function incorrectly. Don't worry if the code you write has bugs. It's expected.
Exception handling is a way to handle various types of errors, which may occur during program execution. If you write code, you must-have encountered errors also called Exceptions. You can take appropriate actions with proper exception handling instead of halting the program completely.
Ruby provides a way to encapsulate a code block and store it into a variable, which can be passed as arguments to methods. This feature of encapsulating a code block is called Procs.