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Crystal programming language

http://crystal-lang.org/

Crystal is a general-purpose, object-oriented programming language designed and developed by Ary Borenszweig and Juan Wajnerman and over one-hundred listed contributors. Crystal is developed as open source software (under the Apache License, Version 2.0) with syntax inspired by Ruby. The language is statically type-checked but does not require that the type of variables or method arguments be specified.

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