call frege from groovy via jsr223 integration

CallJSR223.groovy

package com.canoo

import javax.script.*

//Get the Frege Script Engine
final frege = new ScriptEngineManager().getEngineByName("frege")

//Evaluate an expression
println frege.eval('show $ take 10 [2,4..]')

//Bind a value
frege.eval "x=5"
println frege.eval("x")

//Pass some objects from host to scripting environment
frege.put "foo::String", "I am foo"
frege.put "bar::Integer", 1234567890123456789g

//Use the objects from host environment
println frege.eval('"Hello World, " ++ foo')
println frege.eval("bar + big 5")

/*
 * Frege Script Engine is `Compilable` too. So scripts can be compiled
 * and then executed later.
 */
final compiled = frege.compile("fib = 0 : 1 : zipWith (+) fib fib.tail")
compiled.eval() //Evaluate the compiled script
//use compiled script
println frege.eval('show $ take 6 fib')