Problems reading MongoDb collection with Node.js

[Luis Alberto Grijalva Romero]

I have problems reading this collection with mongoose and Node.js:

I have one JSON inside my Collection and i try to read this with this code:

materias.find().exec(function(err1,materias){
        if(err1){console.log(err1); return next();}
        for(x=0;x<materias.length;x++){
            //console.log(materias[x].Nombre);
            //var arreglo=materias[x].Horario[0].Dia; // TRY ONE
            var arreglo=JSON.parse(materias[x].Horario[0]); // TRY TWO
            console.log(arreglo[0]);

        }
         //RESPONSE TRY ONE
         console.log(arreglo) UNDEFINED
         //RESPONSE TRY TWO
         undefined [ 
         //if I use JSON.stringify the response is {[object][object]...

Suggestions...

[Anthony Ettinger]

materias is not an array, given your example.

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[Luis Alberto Grijalva Romero]

is not an array but if i try with this:

var arreglo = materias[x].Horario[0]; console.log(arreglo); //Response: [[
console.log(materias[x].Nombre)// Response: Tópicos Selectos de Programación
console.log(materias[x].Horario) // Response: [object Object],[object Object],[object Object],[object Object],
console.log(materias[x].Horario[0].Dia); // Response: Undefined
console.log(materias[x].Horario.Dia[0]) // Response: Cannot read property '0' of undefined