Media praise for Opa: Up and Running

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"You will learn about how to work with Opa "the framework" and about some of the language features. The book achieves this with several hands on projects of varies and increasing complexity. There are only a few chapters that are not practical, ex: explaining the opa type system (chapter 7) and a few short introductory chapters at the beginning of the book. Read those chapters because they are packed with good information on some of Opa's strong points." Full Review >
-- Hernan Garcia,

"Opa is a audacious language that lets developers prototype and develop faster, which is good for experimenting new things." Full Review >
-- Luiz Tiago Alves de Oliveira,