math_example_vrs/lib/simple_math.js

An example of creating a package

var call_counter = require('./call_counter');
function add(x, y){
	call_counter();
	return x + y;
}
function subtract(x, y){
	call_counter();
	return x - y;
}
module.exports = {
	addition: add,
	subtraction: subtract
}