author: Bamboo


Collections for EasyLanguage

Introduction

The ELCollections library supports two kinds of collections: Lists and Maps.

A List is an ordered list of values. Values can be pushed onto the front or back of the list, and they can be popped off the front or back. They can also be inserted or removed at any position in the list. A value can be accessed by an index (like an array), or by looking at the front or back of the list. Lists can be “grown” on demand by adding or inserting values.

A Map associates keys and values. A key is a piece of data for which you want to store an associated value. For example, suppose you want to store the last closing price for each symbol. You can put this information in a map, which can be represented conceptually like this:

CSCO -> 19.74
IBM -> 93.37
MSFT -> 29.77
ORCL -> 13.34

Creating a Collection

There are two ways to create a collection:
the New method and the Share method.

Both of these methods return a numeric ID for the new collection. This ID must be stored in a variable and passed to any functions that operate on the collection.

The New method creates a collection that is visible only to the current study or strategy. It does not take any arguments.

The Share method creates a collection that can be shared by multiple studies or strategies. It takes a single argument, which is a unique name that identifies the collection. If no collection with that name exists, it is created; otherwise, the ID of the existing collection is returned. Note that a collection can only be shared within a single application. Charting, RadarScreen, and OptionStation are different applications, so a collection cannot be shared across them.

Collections of Collections

It is possible to create a collection that contains other collections.
For example, you can create a Map of Lists, a Map of Maps, a List of Maps, or a List of Lists.
This allows you to create sophisticated data structures to solve all kinds of problems.


For MultiCharts users:
Please place the elcollections.dll in the Multicharts.exe program directory (i.e. "C: \Program Files\TS Support\Multicharts\").
Once that it done you can import the "ELCollections.eld" file in the zip with PLEditor and you have ELCollections installed.


Manual & instructions in the zip file.

[Tams]

automatic installation version.

after installation, look under c: \program files\ELCOLLECTIONS for


ELCollections.doc (manual)

and

ELCollections.ELD (functions)


.

[Tams]

companion add-on: ADE
http://www.traderslaboratory.com/for...uage-5934.html

[aaa]

If we insert the value of the cash closed compensation in a list, will this programm able to update all the pivots of charts opened ?

Could it store these values to ?

If yes this is great !

[aaa]

OK, Let's go !!

The setup puts elcollections.dll in CWindows\system32\

Here are

ELCollections.pdf

And the list of 185 Fonctions imported with ELCollections.eld (Compilation takes a long time)

After have reading (quickly) the doc, I'm wondering what could I do with this tool...

Anyway, it's nice from Tams to share all his tools with us.

[ochie]

Originally Posted by aaa »

After have reading (quickly) the doc, I'm wondering what could I do with this tool...

I have used ELCollections API and can give you one example using Market Profile. With functions such as “MapNN.Share” and “MapNN.Put” embedded in the standard 30 min MP chart code, it’s possible to transfer the developing profile levels to plots in other workspaces and their charts (e.g. 1 min 5 min, etc.) using functions such as “MapNN.Get.” Very useful and very good documentation, imo.

[aaa]

embedded in the standard 30 min MP chart code

transfer the developing profile levels

Thank you Ochie for your explanation but, Sorrry, I don't understand it

I have to read carefully the doc.

[ochie]

aaa,

Reference pages 2 and 8 in Word Doc for the examples I mentioned:

MapID = MapNN.Share(“Distribution ”);
Value1 = MapXY.Put(ID, Key, Value);
MyValue = MapXY.Get(ID, Key);

Example of how to pass the variable

MapNQ = MapNN.Share("NQLevel1");
Value4 = MapNN.Put(MapNQ,NQ1,up);

Example of how to receive the variable

MapNQ = MapNN.Share("NQLevel1");
Value4 = MapNN.Get(MapNQ,NQ1);
Plot1( Value4, "MapNQ" ) ;

Hope this helps