Errata for Programming Groovy

#38828: I'm reading the mobi version of the book on my kindle, so I don't have a page number. The kindle reports it as location 480-89. The section entitled "Groovy as Lightweight Java" seems to be missing an example after the last bullet point. It reads "For example in the following code, the learn methods return the class so you can chain calls to learn methods:". But there is no example. The Javabeans section begins immediately after the colon. I assume this is an issue with the mobi formatting, but haven't verified.--Bryan Young

#40149: Running the code in Groovy I get an error (book says it will run)

1
2
hello
Exception in thread "main" org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast object '3hello' with class 'java.lang.String' to class 'java.lang.Integer'
at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToNumber(DefaultTypeTransformation.java:127)
at org.codehaus.groovy.runtime.typehandling.DefaultTypeTransformation.castToType(DefaultTypeTransformation.java:256)
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.castToType(ScriptBytecodeAdapter.java:598)
at Generics.main(GTest.groovy:18)

I am running:
Groovy Version: 1.6.3 JVM: 1.5.0_17--Sean M

#32254: "Here's an example: friends refers to a map"

Friends is a list, not a map. Also, the short names in the list definition (e.g. briang) are never used.
--Alan Thompson

#36280: The code works with 1.5.6, JVM: 1.5.0_17-b04 on Ubuntu 8.10
I haven't found a jvm that works with Groovy 1.5.7. If I use 1.5.7 to run UsingDOMCategory.groovy I get
Caught: java.lang.StackOverflowError

The languages.xml file in the code download differs from the example in the book on page 148. The xml file in the book works fine, but the one in the download returns empty results.

#32015: The code:
langs = ['C++' : 'Stroustrup' , 'Java' : 'Gosling' , 'Lisp' : 'McCarthy' ]
xmlDocument = new groovy.xml.StreamingMarkupBuilder().bind {
mkp.xmlDeclaration()
mkp.declareNamespace(computer: "Computer" )
languages {
comment << "Created using StreamingMarkupBuilder"
langs.each { key, value ->
computer.language(name: key) {
author (value)
}
}
}
}
println xmlDocument

Does not produce an indented xml document, but a single line string. This is really important to mention and confusing. I don't think there is a way to make the output indented with that Builder.--Fred Janon