robhinds

def factorial ={ n ->
  if (n == 0) 1 
  else n * factorial(n - 1)
}

factorial(4)

robhinds

def factorial ={ n, accumulator=1 ->
  if (n == 1) accumulator 
  else factorial(n-1, n*accumulator)
}

factorial(4)

robhinds

def factorial ={ n, accumulator=1 ->
  if (n == 1) accumulator 
  else factorial.trampoline(n-1, n*accumulator)
}.trampoline()

factorial(4)

robhinds

def percentage = { percentage, x ->
  x/100 * percentage
}

robhinds

def tenPercent = percentage.curry(10)

robhinds

def list = ['groovy', 'functional']

//This mutates the original list
list.add('programming')

//This creates a new list leaving the original unchanged
def newList = list.plus(2, 'programming')

robhinds

class UnwelcomeVisitorIterator {
   
  static public traverse( data, visitor ){
    if ( data instanceof Map ){
      data.each{ entrySet ->
        entrySet.value = visitor.visitMap( entrySet.key, entrySet.value )
        entrySet.value = traverse( entrySet.value, visitor )
      }
    } else if ( data instanceof Collection ){
      def processedList = []

robhinds

//This code iterates a nested Map/List structure and converts any Date objects it finds into
// String equivalents.
//def data = [:] - data is some complex nested Map/List data structure
UnwelcomeVisitor.traverse( data, [
  visitMap: { key, value -> 
    if ( value instanceof Date ) value = value.toString()
    value
  },
  visitList: { entry ->
    if ( entry instanceof Date ) entry = entry.toString()

robhinds

Entity people = schema.addEntity("People");
people.addIdProperty();
people.addStringProperty("name").notNull();
people.addStringProperty("emailAddress").notNull();

/*
* The entity for an email
*/
Entity email = schema.addEntity("Email");
email.addIdProperty().getProperty();

robhinds

<plugin>
	<groupId>ro.isdc.wro4j</groupId>
  <artifactId>wro4j-maven-plugin</artifactId>
  <version>1.4.5</version>
  <executions>
      <execution>
          <phase>compile</phase>
          <goals>
              <goal>run</goal>
          </goals>