Manning Publications Co., 2013. — 369 p. — ISBN: 978-1935182948. You don’t need the full force of Java when you’re writing a build script, a simple system utility, or a lightweight web app — but that’s where Groovy shines brightest. This elegant JVM-based dynamic language extends and simplifies Java so you can concentrate on the task at hand instead of managing minute details...
Second Edition. — The Pragmatic Programmers, LLC, 2013. — 357 p. — ISBN: 1937785300. Much has evolved in the Groovy language since the publication of the first edition of Programming Groovy. Programming Groovy 2 will help you learn and apply Groovy's new features. Creating DSLs is easier now, and Groovy's already-powerful metaprogramming facilities have improved even more....
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