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Evaluating Ruby on Rails: Cognitive Dimensions and Development Insights

This evaluation report discusses Ruby on Rails, focusing on its core components: the Ruby language, the Rails framework, and the RadRails IDE. It highlights the strong support for agile development and the application of the model-view-controller design pattern. Key cognitive dimensions such as progressive evaluation, domain correspondence, and abstraction level are explored. The report addresses the effectiveness of Rails in leveraging dynamic language features while also noting the challenges, particularly concerning error prevention. Overall, it illustrates how cognitive dimensions can aid in evaluating Rails.

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Evaluating Ruby on Rails: Cognitive Dimensions and Development Insights

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  1. Ruby on Rails Evaluation –Cognitive Dimensions Joshua Sunshine josh.sunshine@cs.cmu.edu

  2. Ruby on Rails Introduction • Three components discussed in report: • Ruby language: dynamic language, SmallTalk heir • Rails framework: • Designed for web application development • Implements model-view-controller design pattern • Strong support in agile development community • RadRails IDE: • Graphical interface for rails specific features • Ruby language support (e.g. code completion)

  3. Default, Smart Design • Point: Rails provides default design • Model view controller • Create, Read, Update, and Delete (CRUD) pages • Generators • Applies to: Framework • Cognitive Dimension(s): progressive evaluation, domain correspondence

  4. Code completion • Point: Code completion is not specific enough to be useful • Applies to: language, IDE • Cognitive Dimension(s): penetrability

  5. Migrations • Point: Migrations provide high level abstraction for data modeling: • Specialized ruby files for updating the data model • Invertible • Objects not records • Applies to: framework • Cognitive dimension(s): abstraction level

  6. Conclusion • Rails leverages dynamic language yielding excellent domain correspondence, progressive evaluation, and abstraction level easily mitigating penetrability problems. • Cognitive dimensions are an effective way of evaluating rails. • Error prevention is a major missing item. It is also a major drawback of the dynamic approach.

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