# Create a Context
cx = JS.context
p cx
# get the Context's global object
jo = cx.getGlobalObject
# set "a" to "f"
jo[:a] = "f"
jo[:a] #=> "f"
# set "b" to 3.45
jo[:b] = 3.45
jo[:b] #=> 3.45
# set "c" to a function (adds arg1 and arg2)
jo[:c] = Proc.new do |ctx_, this, *o|
  o[0] + o[1]
end
# call a function
jo[:c].call(1,2) #=> 3
# create a Object from a Hash
jo[:d] = {
  :foo  => 3, # Number
  :bar  => Proc.new do |ctx_, this, *args| puts "Called with #{args.length}, args." end, # function
  :quux => [1,2,3] # Array
}
# properties as methods
jo.d.foo
jo.d.quux[2]
jo.d.bar.call(1, 2, "foo")
# Prove JS can reach us
JS.execute(cx, "function moof() {return 5;};this.bar(1,2,3,4,5,6);", jo.d)
# And that we can reach JS
jo.moof.call()
# Have a javascript object wrap a ruby object
class MyObject
  attr_reader :foo
  def initialize
    @foo = 1
  end
  def bang *o
    puts "BANG!"
  end
end
ro = JS::RObject.make(cx, MyObject.new())
cx.getGlobalObject[:myObj] = ro
JS::execute cx, "myObj.bang(); myObj.foo();" #=> 1.0