function isEmpty() {
        if (_valueType === 'string') {
            _valid = _valid && _value === '';
        } else if (_valueType instanceof Array) {
            _valid = _valid && _value.length === 0;
        }
        return _guard;
    }
// Only useful for string / array objects.
Only useful for string / array objects.
Only useful for string / array objects .
function isEmpty() {
        if (_valueType === 'string') {
            _valid = _valid && _value === '';
        } else if (_valueType instanceof Array) {
            _valid = _valid && _value.length === 0;
        }
        return _guard;
    }
function isEmpty ( ) { if ( _valueType === 'string' ) { _valid = _valid && _value === '' ; } else if ( _valueType instanceof Array ) { _valid = _valid && _value . length === 0 ; } return _guard ; }
Only useful for string / array objects.
Only useful for string / array objects .