matematicabisao83/lib/matematicaAvancada.js

Um exemplo de projeto node com operações matemáticas

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

function multiply(x, y){    
    call_counter();    
    return x * y; 
} 

function divide(x, y){    
    call_counter();    
    return x / y; 
} 

function fibo(count) {    
    call_counter();    
    return private_fibo(count) 
}

// The fibo function calls the private_fibo function, a recursive function that calls itself until
// the count and counter are equal. The private_fibo function is not exported, so it will be accessible
// only from the fibo function that is exported.
function private_fibo(count, counter, first, second) {    
    if (count == 0) return 0;    
    if (counter == undefined) {        
        counter = 1        
        first = 1;        
        second = 2;    
    }    
    result = first + second;    
    
    if (counter == count) 
        return result;    
        
    private_fibo(count, ++counter, second, result)    
        return result; 
} 

//The advanced_math.js module exports three functions, so an object is created to provide access to these functions. 
module.exports = {    
    multiplication: multiply,    
    division: divide,    
    fibonacci : fibo 
}