Ruby on Rails (RoR) is a web application framework that is designed to simplify and speed up the process of developing web applications. RoR has gained popularity due to its focus on convention over configuration, which means that it provides a set of conventions and best practices that developers can follow, rather than requiring them to configure every aspect of the application themselves.
Development as a Service (DaaS) is a model where development services are provided to clients on a pay-per-use basis. This model is similar to other "as a service" models such as Software as a Service (SaaS) and Platform as a Service (PaaS).
RoR can be used as a Development as a Service platform by providing a hosted environment where developers can build and deploy their applications. This approach can be beneficial for businesses that do not have the resources or expertise to build and maintain their own development environment.
There are several companies that provide RoR Development as a Service, such as Heroku, Engine Yard, and AWS Elastic Beanstalk. These services provide a scalable and secure environment for developers to build and deploy their applications, while also providing additional features such as automated scaling, monitoring, and backups.