Number.prototype.toFixedDown = function (digits) {
    var re = new RegExp("(\\d+\\.\\d{" + digits + "})(\\d)");
    var m = this.toString().match(re);
    return m ? parseFloat(m[1]) : this.valueOf();
};

Number.prototype.truncate = function (digits) {
    var num = this.valueOf().toFixedDown(digits);
    num = num.toString();
    var intero = String(num.split('.')[0]);
    var fraction = String(num.split('.')[1]);
    var padding = '';
    if (isNaN(intero)) return '';

    if (fraction == 'undefined') {
        fraction = '';
        padding = new Array(Math.max(digits - fraction.length, 0) + 1).join('0');
        if (digits > 0) {
            num += '.' + padding;
        }
    } else {
        padding = new Array(Math.max(digits - fraction.length, 0) + 1).join('0');
        num += padding;
    }
    return num;
};

//funzione per l'arrotondamento delle cifre decimali in eccesso dal 5
Number.prototype.toFixedExcess = function(precision){
    precision = (parseInt(precision) == 0) ? 0:(parseInt(precision) || 2);
    var num = this.valueOf();
    var pow = Math.pow(10,precision);
    return (Math.round( num * pow ) / pow).toFixed(precision);
};

//Funzione per arrotondare correttamente i numeri in modo da correggere l'errore delle somme e differenze
function myParseFloat(number){
    //console.log("MyParseFloat-Old: "+number);
    var newnumber = new Number(number+'').toFixed(12);
    //console.log("MyParseFloat-New: "+newnumber);
    return parseFloat(newnumber);
}

//Funzione che implementa il pad left di una stringa
Number.prototype.padLeft = function (n,str) {
    return (this < 0 ? '-' : '') +
        Array(n-String(Math.abs(this)).length+1)
            .join(str||'0') +
        (Math.abs(this));
};

const checkIfAddressIsInArea = (location, area) => {
    if (google.maps.geometry.poly.containsLocation(location, area)){
        return true;
    } else {
        return false;
    }
}

const checkIfAddressIsInAreaLatLon = (lat, lon) => {
    const location = new google.maps.LatLng(lat, lon);
    if (google.maps.geometry.poly.containsLocation(location, area)){
        return true;
    } else {
        return false;
    }
}