juanhiennvdm_math_example/lib/simple_math.js

An example of creating a package

var call_counter = require('./call_counter.js');

function add(x, y) {
    call_counter();

    return x + y;
};

function subtract(x, y) {
    call_counter();

    return x - y;
};

module.exports = {
    addition: add,
    subtraction: subtract
};