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Pry is the featureful development console for Ruby. From its humble roots as an irb replacement, Pry has grown into an indispensable tool for any Ruby or Rails programmer. Using some real-life examples, I'll explain how to use Pry effectively. We'll start from the beginning, with simple features for exploring libraries and source-code in glorious technicolor. Then we'll move up a level and discuss how to inspect, debug and even modify a program while it is still running. Finally we'll touch on some of Pry's more advanced plugins that can really help you get a feel for what your code is doing. Help us caption & translate this video! http://amara.org/v/FGad/
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In the video titled "Pry-- The Good Parts!" presented by Conrad Irwin at Rails Conf 2013, the focus is on Pry, a powerful development console for Ruby, designed to enhance debugging and code exploration. Irwin emphasizes how essential Pry has become for Ruby and Rails programmers, transforming a simple interactive Ruby shell into a robust tool. The session starts by contrasting Pry with irb, highlighting its improved features: - **Syntax Highlighting:** Pry provides color-coded output, making it easier to read and understand program flow. - **Introspection Commands:** Unique distinct commands, such as `ls`, that offer an intuitive interface to explore methods available on modules quickly. - **Binding.pry Feature:** A crucial aspect of Pry that allows developers to pause execution in a running program, enabling real-time debugging and inspection of variables. Irwin illustrates these features using a fictional blog engine example, detailing how Pry aids in solving various programming problems. He discusses several scenarios where Pry's capabilities significantly enhance the coding experience: - **Exploring Libraries:** Demonstrates using the base64 library where he utilizes commands such as `ls` to find available methods and `question mark` for quick documentation lookup. - **Debugging with Binding Pry:** Describes placing a `binding.pry` statement to pause execution and explore variable states without needing to rerun the entire program. - **Editing Code on the Fly:** Shows how to edit methods directly from Pry using the `edit` command or `edit -x` for the last raised exception, streamlining debugging processes. Additionally, Irwin talks about common tasks like producing user-friendly URLs by implementing safe string replacement methods. Throughout the presentation, he reinforces the importance of using Pry over traditional logging methods, arguing that it saves substantial time in debugging because it allows developers to interactively inspect their code. Finally, the video concludes with Irwin discussing some advanced plugins for Pry, such as Pry-Rails and Pry-Debugger, which further enhance its functionality, emphasizing that addressing debugging early in development can lead to much more efficient coding practices. He reiterates that everything shown is core to Pry and highly beneficial for Ruby developers, encouraging viewers to integrate it into their coding workflows. Overall, the session delivers crucial insights into how Pry can transform the Ruby programming experience, making it indispensable for efficient debugging.
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