My Code

for ( var i = 0; i < response.length; ++i ) {
        str = response[i].judul;
        str2 = response[i].waktu_mulai;
        str3 = response[i].channel_code;

        if(str.lenght === 0){
            alert('Empty')
        }

        //if ( data['items'].length < 1 ) {
        //  alert('Empty')
        //}
}