Very Easy Question

[futurenets]

I'm probably overtired and doing something silly but can anyone tell me why ...

TestA.efs works ok

TestB.efs doesn't

on eSignal Version 10.6.2415.1208

[futurenets]

still not sure why TestA works and TestB doesn't but this fixes it ..

function main()
{
var vBarState = getBarState();

if(getCurrentBarCount() < 3)
return null;

if (vBarState == BARSTATE_NEWBAR)
{
if (bInit == false)
{

bInit = true;

db("testB1");
db("testB2",getValue("year",-2));
db("testB3",getYear(-2));

}
}

return null;
}

useful to know when debugging.

[futurenets]

Very Easy Question II

Can anyone tell me why I'm able to reference bars using with +ve indexes in the attached TestC.efs.

[waynecd]

Nice catch.
This also interests me so I ran a few tests.

I ran tests on a 3 minute chart of "ES #F".

Conclusion: When more than one function call exists within the bInit conditional , it runs normally until it executes the first function call,
it then retains the functions return value in memory. On this first run it will keep in memory the value of variables before the second function call.
(note that minute 06:36 doesn't change even though the chart advanced to time 07:09 by the time I ran these tests)

Then the bInit conditional runs a second time with the value of bInit it had before the second function call.
If bInit was set to true before the second function call then the bInit condition doesn't run again since now bInt==true;
If bInit was set to true after the second function call then the bInit conditional runs a second time all the way calling the remaining functions.

So if bInit is set to true before the second function call, the bInit conditional will not run the remaining code on the second run.

The fact that the script runs the bInit conditional inside of the "BARSTATE_NEWBAR" conditional, didn't affect the outcome when I tested it with and without the "BARSTATE_NEWBAR" conditional.

The last test below shows that the bInit conditional is only interrupted if there is a second function call since with only one function call all the debugPrintln(...) lines of code below the function call executed.

        if (bInit == false) 
        {
            bInit = true;
            db("testB1");
        debugPrintln("21: bInit = "+bInit);
            db("testB2",getValue("year",-2));     
        debugPrintln("22: bInit = "+bInit);
            db("testB3",getYear(-2));     
        debugPrintln("23: bInit = "+bInit);
        }
    }

//returns the following:
//21: bInit = true
//12 20 14 36 testB1 undefined undefined undefined 

        if (bInit == false) 
        {
            db("testB1");
            bInit = true;
        debugPrintln("21: bInit = "+bInit);
            db("testB2",getValue("year",-2));     
        debugPrintln("22: bInit = "+bInit);
            db("testB3",getYear(-2));     
        debugPrintln("23: bInit = "+bInit);
        }
    }

//returns the following:
//21: bInit = true
//12 20 14 36 testB1 undefined undefined undefined 

        if (bInit == false) 
        {


            db("testB1");
        debugPrintln("21: bInit = "+bInit);
            bInit = true;
            db("testB2",getValue("year",-2));     
        debugPrintln("22: bInit = "+bInit);
            db("testB3",getYear(-2));     
        debugPrintln("23: bInit = "+bInit);
        }
    }
//returns the following:
//21: bInit = false
//12 20 14 36 testB1 undefined undefined undefined 

        if (bInit == false) 
        {
            db("testB1");
        debugPrintln("21: bInit = "+bInit);
            db("testB2",getValue("year",-2));     
            bInit = true;
        debugPrintln("22: bInit = "+bInit);
            db("testB3",getYear(-2));     
        debugPrintln("23: bInit = "+bInit);
        }
    }
//returns the following:
//23: bInit = true
//12 20 14 39 testB3 2012 undefined undefined
//22: bInit = true
//12 20 14 39 testB2 2012 undefined undefined
//21: bInit = false
//12 20 14 39 testB1 undefined undefined undefined
//21: bInit = false
//12 20 14 36 testB1 undefined undefined undefined 

        if (bInit == false) 
        {

            bInit = true;

            db("testB1");
            debugPrintln("21: bInit = "+bInit);
//            bInit = true;
            //db("testB2",getValue("year",-2));     
//            bInit = true;
            debugPrintln("22: bInit = "+bInit);
           // db("testB3",getYear(-2));     
            debugPrintln("23: bInit = "+bInit);
        }
//returns the following:
//23: bInit = true
//22: bInit = true
//21: bInit = true
//12 20 16 9 testB1 undefined undefined undefined 

Wayne

[futurenets]

thanks again Wayne. appreciated.

[waynecd]

You're welcome.

Wayne

[futurenets]

not sure why "Very Easy Question II" (Above) has been merged with this one ... they're unrelated.

[waynecd]

Can anyone tell me why I'm able to reference bars using with +ve indexes in the attached TestC.efs.

I don't know if it helps but within "BARSTATE_ALLBARS" eSignal seems to already know how many bars will be loaded, maybe because of the default or selected Time Template and interval.

Here are the results for "BARSTATE_ALLBARS" and the most current bar. NOTE: I changed "function db(a,b,c,d)" somewhat.

function preMain() {
    setPriceStudy(true);
    setStudyTitle("www.futurenets.co.uk TestC eSignal Version 10.6.2415.1208");
}

var bInit = false;
var Flag = 0;
function main() 
{
    if (getBarState() == BARSTATE_ALLBARS)
    {
        var OldestBar = getOldestBarIndex();
        OldestBar *= -1; //OldestBar is now +ve
        db("testC1",OldestBar);
        db("testC2",getValue("rawtime",OldestBar));
        db("testC3",getValue("year",OldestBar)); 
        debugPrintln();        
    }
    if(getCurrentBarIndex()==0 && getBarState()== BARSTATE_NEWBAR){
        if(Flag!=1){
            var OldestBar1 = getOldestBarIndex();
            OldestBar1 *= -1; //OldestBar1 is now +ve
            db("testC4",OldestBar1);
            db("testC5",OldestBar1,getValue("rawtime",OldestBar1));
            db("testC6",OldestBar1,getValue("year",OldestBar1));        
            Flag=1;
        }
    }
    
    return null;
}

function db(a,b,c,d) {
    debugPrintln(a + "\t1: "+getMonth() + " " + getDay() + " " + getHour() + " " + getMinute() + " " + b + " " + c  + " " + d+"\t"+getCurrentBarCount());
    if(a != "testC1" && a != "testC2" && a != "testC3"){
        debugPrintln("\n"+a + "\t2: "+getMonth(-b) + " " + getDay(-b) + " " + getHour(-b) + " " + getMinute(-b) + " " + b + " " + c  + " " + d+"\t"+getCurrentBarCount());
    }
}
/*
returns:
testC6    2: 12 20 16 57 313 null undefined    314
testC6    1: 12 21 9 21 313 null undefined    314

testC5    2: 12 20 16 57 313 null undefined    314
testC5    1: 12 21 9 21 313 null undefined    314

testC4    2: 12 20 16 57 313 undefined undefined    314
testC4    1: 12 21 9 21 313 undefined undefined    314

testC3    1: 12 20 16 57 2012 undefined undefined    1
testC2    1: 12 20 16 57 1356099660 undefined undefined    1
testC1    1: 12 20 16 57 313 undefined undefined    1
*/