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Enable Remote Debugging on a Java Server

-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5001

The best documentation on this is available from InformIT. This site details the following parameters:

• -Xdebug : Enables the application to be debugged.
• -Xnoagent : Disables the sun.tools.debug agent so that the JPDA debugger can properly attach its own agent.
• -Djava.compiler=NONE : Disables the JIT (Just-In-Time) compiler.
• -Xrunjdwp : Loads the reference implementation of the Java Debug Wire Protocol, which enables remote debugging.

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/*
    Notes on Collections
	
    By default, Scala uses immutable collections. However, there are mutable 
    versions available (in the scala.collection.mutable package). The most common
    collections are List, Set, and Map.	
*/

// Declaring a set
val urls = Set("google.com", "yahoo.com", "nytimes.com")

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/*
	Playing with Scala Traits, a nice way to add (mixin) functionality 
	to classes using the decorator pattern.
	
	With traits, the evaluation occurs left to right. Traits can be 
	applied to class/trait definitions in addition to objects, as
	demonstrated by the class ContinuousIntegration
*/
class Test {
	def test() : String = "Testing... "

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#
# Check if files/directories exist
if [ -f file ]; then
  echo "file exists"
fi

if [ -d dir ]; then
  echo "dir exists"
fi

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# Create an associative array of options/values
@options = {"Select Something" => 0, "Cat" => 1, 
  "Dog" => 2}
@value = 1

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$ rsync -avz -e ssh username@remote.server:/remote/dir /local/dir

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$ svnadmin dump /repo/dir > repo.dump

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# Change VBox UUID
$ VBoxManage internalcommands setvdiuuid diskName.vdi

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###
# Migrations
# data_types = {:string, :text, :integer, :float, :decimal, :datetime, :timestamp,
#               :time, :date, :binary, :boolean }

# Add a Column
add_column :table_name, :column_name, :data_type, :options

# Remove a Column
remove_column :table_name, :column_name

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In rails, -%> can remove any newline that follows the output.