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====== Groovy Closure ======
  * [[http://examples.javacodegeeks.com/core-java/groovy-closure-example-2/|Groovy Closure Example]]
  * [[https://dzone.com/articles/functional-programming-groovy|Functional Programming with Groovy]]
  * [[http://mrhaki.blogspot.kr/2009/09/groovy-goodness-using-inject-method.html|Groovy Goodness: Using the Inject Method]] : ''inject'' is ''reduce''
  * [[https://tedvinke.wordpress.com/2015/08/16/groovy-weekend-collections-injecting-or-map-reduce/|Groovy Weekend – Collections: Injecting or Map Reduce]]

====== Method Reference ======
  * [[http://mrhaki.blogspot.com/2009/08/groovy-goodness-turn-methods-into.html|Groovy Goodness: Turn Methods into Closures]]
<code groovy>
public class JavaObject {
 public static void javaSays(final String s) {
  System.out.println("Java says: Hello " + s + "!");
 }
}

// Groovy method to convert to closure.
def groovySays(s) {
 "Groovy says: Hello ${s}!"
}
// Use .& syntax to convert method to closure.
names.each(this.&groovySays)
 
// Convert Java method to closure and use it.
def javaSays = JavaObject.&javaSays
names.each javaSays
</code>

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