An alternative might be:
var tasks = [f1];
if(myBool){
tasks.push(f2);
}
tasks.push(f3);
async.waterfall(tasks, function(err, result){
});
where f1
, f2
, and f3
are your functions.
other than that, you're better off doing it explicitly, avoid making your code overly complicated, simpler is usually better
update:
function f1(done){
if(myBool){
f2(done);
}else{
done();
}
}
function f2(done){
async.nextTick(function(){
// stuff
done();
});
}
async.waterfall([f1,f3],function(err,result){
// foo
});