Node.js参考错误：类名未定义

Question

I have a file bloom.js which is as follows :

     function Bloom(k, m, n, hashFunction){

        if(!m)
            m = 1000

        this.m = m;

        if(!n)
            n = 100

        this.n = n;

        if(!k)
            k = Math.max(Math.round(m / n * Math.LN2), 1)

        this.k = k


        this.insert = function(string){

            for(var i = 0; i < this.k; i++){

                var index = parseInt(this.hashFunction(i + string), 16) % this.array.length

                this.array[index] = 1;
            }

            return true;
        }





    }
module.exports = Bloom;

In my main.js i am getting errors when doing this :

var Bloom = require("./bloom"); var bloom = new Bloom();

Error :

TypeError: Bloom is not a function
at Object.<anonymous> (J:\code\Main.js:114:13)
at Module._compile (module.js:409:26)

How can i resolve this error ? I tried exporting module too but it didnt worked.

Answer 1

// bloom.js
   function Bloom(k, m, n, hashFunction){

    if(!m)
        m = 1000

    this.m = m;

    if(!n)
        n = 100

    this.n = n;

    if(!k)
        k = Math.max(Math.round(m / n * Math.LN2), 1)

    this.k = k


    this.insert = function(string){

        for(var i = 0; i < this.k; i++){

            var index = parseInt(this.hashFunction(i + string), 16) % this.array.length

            this.array[index] = 1;
        }

        return true;
    }
}
module.exports = Bloom;

Then, in main.js:

// NOTE! the variable name here is what matters, not what you defined in bloom.js
var Bloom = require("./bloom");
var bloom = new Bloom();