Singleton pattern

The Singleton Pattern in Crystal Language

How to implement the Singleton pattern in Crystal with an example of its usage in the Lucky Framework.

I recently started learning the Crystal Language. As a long-time Ruby developer, this language readily caught my attention as a worthy candidate for building applications that needed very fast processing times. One of the first things I kept finding myself in need of was a simple implementation of the Singleton Pattern. Surprisingly, this was harder to achieve than I thought it would be...

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