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Problem with callback.


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I have a problem with a function that contains a callback. The problem is, when I execute it the first time, it works without no problem, but the second time, the callback is executed twice: first with the first value and later with the second value.


I post the code and an example of running


Code of the function:

function titulo(terminoTitulo) {      console.log("titulo():");      console.log("titulo(): Fuera del callback: " + terminoTitulo);      consultar_titulo(terminoTitulo, function (titulo) {          console.log("titulo(): termino: " + terminoTitulo);          console.log("titulo(): Dentro del Callback");          console.log("titulo(): "+titulo.length);      });

Code of the proxy that receives the parameters and calls to a nodejs server:

function consultar_titulo(titulo_consulta, callback) {    var socket = io.connect('http://localhost:8080');    socket.emit('consultar_titulo', {        "titulo_consulta": titulo_consulta    });    console.log("proxy(): Emitida la consulta");    socket.on('respuesta_consultar_titulo', function (data) {        console.log("proxy(): Estoy en el proxy dentro del callback");        callback(data.respuesta_emit);    });} //consultar_titulo()

Example of running.

titulo():titulo(): Fuera del callback: bbb proxy(): Emitida la consulta proxy(): Estoy en el proxy dentro del callback titulo(): termino: aaa titulo(): Dentro del Callback titulo(): 0 proxy(): Estoy en el proxy dentro del callbacktitulo(): termino: bbb titulo(): Dentro del Callbacktitulo(): 0 
In this example the first time, the user introduced "aaa", and the second time "bbb".
As can see, the function is called once but when the callback is executed two times.
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