Ruby Array and String Cheat Sheet by nirintsoa - Download free from Cheatography - Cheatography.com: Cheat Sheets For Every Occasion
Learning Ruby
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Ruby Cheat Sheet by Ruby Gray - Download free from Cheatography - Cheatography.com: Cheat Sheets For Every Occasion
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ruby on rails - java vs Ruby vs php - learn Ruby - Ruby tutorial - ruby on rails tutorial - rails guides - rails tutorial - ruby rails - By Microsoft Award MVP - Learn in 30sec | wikitechy
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How to Reverse a String [Interview Question + Solution]
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reverse a string in Ruby - Code Snippets with explanation