> For the complete documentation index, see [llms.txt](https://certil-remy.gitbook.io/learn/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://certil-remy.gitbook.io/learn/oop-ruby/untitled-16.md). # Video Review: Object Models [Permalink](https://github.com/learn-co-curriculum/oo-ruby-video-review-object-models/blob/de45ef2f5c1f221027b27ea58536826ef9b15e87/README.md) ### Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. [Sign up](https://github.com/join?source=prompt-blob-show\&source_repo=learn-co-curriculum%2Foo-ruby-video-review-object-models) 24 lines (17 sloc) 1.35 KB ## Overview This video gives an overview of object models and how to make our classes more powerful. ## Objectives * Create a class and add reader and writer methods * Define class methods with an explicit `self` receiver * Capture new instances of `self` in the `initialize` method * Use a class variable or constant to hold the instances of the class * Explain why we avoid using the `return` keyword from within a loop * Define a `find_by_location` method to find a particular instance of a class * Abstract the logic of the `find_by_location` method to a `detect` enumerable method * Define a class method `find_all_by_location` to find all instances with that location using the `select` enumerable method * Define a custom constructor method to create instances from attributes scraped from a website \ ## Resources [Additional Video on Object Models](https://www.youtube.com/watch?v=vXz6ExSdm94) * This video also covers many of the above topics in the main lesson video. Feel free to use this as another refresher on object models. View [OO Ruby Video Review: Object Models](https://learn.co/lessons/oo-ruby-video-review-object-models) on Learn.co and start learning to code for free.