Examples/javascript/reference/runme.js

// This file illustrates the manipulation of C++ references in Javascript.
var example = require("example");

// ----- Object creation -----

console.log("Creating some objects:");
a = new example.Vector(3,4,5);
b = new example.Vector(10,11,12);

console.log("   created" + a.print());
console.log("   created" + b.print());

// ----- Call an overloaded operator -----

// This calls the wrapper we placed around operator+(const Vector &a, const Vector &) 
// It returns a new allocated object.

console.log("Adding a+b");
c = example.addv(a, b);
console.log("a+b = " + c.print());


// TODO: Note: Unless we free the result, a memory leak will occur
//delete_Vector(c);

// ----- Create a vector array -----

// Note: Using the high-level interface here
console.log("Creating an array of vectors");
va = new example.VectorArray(10);
console.log("va = " + va);	 

// ----- Set some values in the array -----

// These operators copy the value of a and b to the vector array
va.set(0,a);
va.set(1,b);

// This will work, but it will cause a memory leak!
va.set(2,example.addv(a,b));

// The non-leaky way to do it
//c = addv(a,b);
//va.set(3,c);
//delete_Vector(c);

// Get some values from the array

console.log("Getting some array values");
for (i = 0; i < 5; i++) {
	temp = va.get(i);
    console.log(i,temp.print());
}

// Watch under resource meter to check on this
console.log("Making sure we don't leak memory.");
for (i = 0; i < 1000000; i++) {
    c = va.get(i % 10);
}
//---------TODO---------
//----- Clean up -----
//console.log("Cleaning up");

//example.delete_VectorArray(va);
//example.delete_Vector(a);
//example.delete_Vector(b);