Better practice to store a collection of data

[bltdavid]

If I would like to copy a ListSeries<int> form one to another Indicator.
What would be the Syntax to achieve it??

I'll respond before today is over.

As a quick answer, if you make your ListSeries public, other indys and
strats can easily get to that data.

Examples soon ...

[efeuvejota01]

Thank you bltdavid,!! No worries!!

[efeuvejota01]

Hello bltdavid, I am sorry to say this, but I really need a way to remove, in some cases, the last two Pivots. I tried replace the value with "0" (zero), but the logic and the code get creasy.
Please!! enable the RemoveAt() feature.....
Sincerely FVJ

[QuantKey_Bruce]

Perhaps just use a List<MyType> here if you want to remove them? Or a Queue or a Stack, if that is appropriate for your usage, though most people just use lists.

[bltdavid]

to communicate between Indicators when there is no other way.
If I would like to copy a ListSeries<int> form one to another Indicator.

I've updated the example file you cited and added some sample
code to help you get started.

This zip file contains a new file called MyCommon.cs, which declares
the namespace 'My.Common'.

Inside the My.Common namespace, you'll find the class definition for
ListSeries<T>.

The point of MyCommon.cs is to address the dilemma discovered
by the OP in post 7 above -- that is, just where the heck does the
class ListSeries<T> live?

It lives in the namespace My.Common in the file MyCommon.cs
located in the Indicators folder.

You gain access to the class definition with 'using My.Common;',
which you add to the top of your Indicator, Strategy, or AddOn script.

Installing the attached zip file will install Indicators/MyCommon.cs.

Enjoy!



PS: My apologies to the OP for not having all this completely fleshed
out when I first introduced ListSeries<T> ...

[bltdavid]

I really need a way to remove, in some cases, the last two Pivots. I tried replace the value with "0" (zero), but the logic and the code get creasy.
Please!! enable the RemoveAt() feature.....

Ok, I gotcha covered ... I needed that later, too, in a different
project. [I was reluctant to muddy the waters too much when
I was first describing ListSeries<T>, my apologies to the OP
who probably/kinda/sorta/maybe needed this as well.]

Yeah, so, what's the best way to do that?
Here's one way, use my ListStack<T> class.

I invented ListStack<T>, which inherits from ListSeries<T>.

Download the attached file MyCommon.cs, and overwrite the
original file you download in the V2 example code in my previous
post.

In your code, you'll want to change every occurrence of the string
'ListSeries' to 'ListStack'.

A ListStack<T> gives you all the features of a ListSeries<T> but
adds 3 additional methods,

Push()
Pop()
Peek()

When you need to remove the last two pivots, you'll call Pop() twice.

Enjoy!



PS: If you feel really bold, you can copy the Pop method from
ListStack and add it to ListSeries, but maybe call it something
like RemoveLast() ... feel free to play with what works best in
your project.

[bltdavid]

Alright, I took my own advice.

This final version of MyCommon.cs has been updated to
do what you (and the OP) have asked for -- I implemented
my suggestion about RemoveLast from my previous post.

This version of ListSeries<T> has a new method called
RemoveLast() -- this method does the 'Pop' operation I
introduced in ListStack<T> in my previous post.

zzBar.Set(CurrentBar);
zzBar.RemoveLast(); // undo the Set

If you need to remove the last two slots, then you would
need to call RemoveLast() twice.

Download the attached file, overriding your previous copy.

Enjoy!

[efeuvejota01]

bltdavid:
Thank you Very Much for all the help...

I hope this is the last question...

how would it be a the syntax of the following sentence of two lists (list01 and list02)

list01 = list00.Cast<int>().ToList();

for a ListSeries<T>???

Is analogue to the question I had related with the lists.... https://forum.ninjatrader.com/forum/...21#post1253521

Thank you very much!!!
FVJ

[bltdavid]

Is analogue to the question I had related with the lists

I've updated the class definition of ListSeries<T>
so that you could use an existing ListSeries variable
when creating a new one,

list01 = new ListSeries<int>(list00);

I've basically added a new constructor that takes an
existing ListSeries<T> and returns a duplicate of it.

[EDIT: This is analogous to Bruce's post here.]

But first, you'll need to download the new MyCommon.cs
file attached below.

[efeuvejota01]

Thank you David!!
Thank you Bruce!!
I will try to finish this!!
FVJ

[efeuvejota01]

Good morning bltdavid,

I am trying to make a new ListSeries<T> but with the source in other indicator

so I tried [CODE]list01 = new ListSeries<int>(NinjaTrader.Ninjascript.Indicators .list00);[/CODE] but it did not compile...

list00 is declared in the other indicator as follows

public static            ListSeries<int>        list00        = new ListSeries<int>()     {Name = "list00"};

Is there any syntax I can improve??

Thank you for your advice!!!
FVJ

[bltdavid]

I am trying to make a new ListSeries<T> but with the source in other indicator

so I tried

list01 = new ListSeries<int>(NinjaTrader.Ninjascript.Indicators.list00);

but it did not compile...

list00 is declared in the other indicator as follows

public static ListSeries<int> list00 = new ListSeries<int>() {Name = "list00"};

Is there any syntax I can improve??

Thank you for your advice!!!

Ok, and what is the class name of that other indicator?
(I think that's your issue)

-=o=-

Here's an example:
Let's say you have two indicators, and their names are,

GoodLine
BetterLine

Let's say the GoodLine indicator has the list00 variable,
per your code above.

Inside BetterLine, you can make a copy of that list00 variable,
using this code,

list01 = new ListSeries<int>(NinjaTrader.NinjaScript.Indicators.GoodLine.list00) { Name = "list01" };

Give that a try.

[efeuvejota01]

Hi!!
I tried as suggested... but no luck!!



Thank you!!!
FVJ

[bltdavid]

Did you download the latest MyCommon.cs?

Do you have 'using My.Common;' in both indicators?

[efeuvejota01]

I had the previous version in the source indicator!!! now is working!!!
Thank you FVJ