for(var i=0;i<settingData.length;i++){
        if(settingData[i].a !== '' && $scope.settingData[i].b){
save();
}else{
alert('missing fields');
}
}

for(var i=0;i<settingData.length;i++){
    if(settingData[i].a !== '' && $scope.settingData[i].b){
        save();
        break;
    }else{
        alert('missing fields');
    }
}