Ruby Guides 
Ruby Guides
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Testing Ruby Applications: Unit Testing and Test-Driven Development (TDD)
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Working with Dates and Times in Ruby: From Simple Calculations to Time Zones
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Integrating Ruby with Other Languages: Interoperability Techniques
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Creating RESTful APIs with Ruby: Building Robust Web Services
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Concurrency in Ruby: Parallel Execution with Parallel, Concurrent Ruby, and More
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Exploring Ruby’s File Manipulation Functions: Reading, Writing, and Beyond
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Deploying Ruby Applications: Strategies and Deployment Tools
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Ruby for Web Scraping: Extracting Data from Websites
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