angular.module('focaDirectivas')
    .directive('stringToNumber', function () {
        return {
            require: 'ngModel',
            link: function (scope, element, attrs, ngModel) {
                ngModel.$parsers.push(function (value) {
                    return '' + value;
                });
                ngModel.$formatters.push(function (value) {
                    return parseFloat(value);
                });
            }
        };
    });