Created
October 3, 2017 05:14
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Crystal Lang singleton
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| class Singleton | |
| @@instance : Nil | Singleton | |
| @@instance = nil | |
| def self.new | |
| @@instance ||= Singleton.allocate.tap(&.initialize) | |
| @@instance.as(Singleton) | |
| end | |
| end |
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