#Beginner

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Beginner tag unites articles and questions for those who are getting started with InterSystems Data Platform

Hello dear developers,

I am currently doing an internship and learning about InterSystems IRIS and ObjectScript and have downloaded and installed the community version of IRIS.

I have not made any changes in the Management Portal.
In Visual Studio Code I have loaded the InterSystems ObjectScript Extension Pack.

If I now want to compile a file, VSC throws an error:
"ERROR #16006: Document name 'x.csp' is invalid"

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Currently to check if the class is mapped I call:

ClassMethod IsClassMapped(class) As %Boolean

{
  set sc = $system.OBJ.GetClassList(.classes,"/system=0 /percent=0 /mapped=0")
  quit $data(classes(class))
}

And it works, but I'm interested if there is a simpler approach out there?

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Hello,

I was wondering if there is a way to maybe temporarily alter the [Private] tag dynamically or any other way to run a Unit test against class method, which has been labeled as [Private]?

I mean, I understand there is a workaround to create a non private class method inside this class, which will in turn call this private method and run a Unit test on the non private method, but I am looking for a way to do this without altering the original class.

Thank you,

Alex

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Today in docs I found this example using NULL:

 WRITE $LISTVALID($LB(NULL)),!

simplified

zzdump $LB(NULL)

and NULL can be case-insensitive:

zzdump $LB(null)

seems the same as just:

zzdump $LB()

But if null variable is defined then list would contain value from variable. Case sensitive in that situation.

Does anyone have any Idea what is this? Is NULL used anywhere besides as a list element?

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NewBie's Corner Session 20 Parameters and Status Part I

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

Parameters

Parameters are another name for Variables when used in passing data from one Routine to another.

Let us say we have 2 routines (RtnA and RtnB), and we want to pass 3 parameters (Parm1, Parm2, Parm3) from RtnA to RtnB.

RtnA would look like:

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I am trying to create a query that returns the best and worst performing products for a given customer, based on this year's net sales versus last year's net sales, weighted by the total net sales for all of the products sold to this customer in the last two years.

I have created Last Year Net Sales (up to the last month end): AGGREGATE(PERIODSTODATE([Invoice Date].[H1].[YEAR],[Invoice Date].[H1].[Month].[NOW-13]),measures.[Net Sales])

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Question
· Oct 17, 2016
Are we using callin API?

Hello community; this may seem odd, but I need to know if there's any way we could be using callin functions from a C application without knowing? e.g. if other developers created some C programs that call in to Caché that we don't realize are running. Is that possible? If so, where would I look to see these programs? Perhaps the server's task manager?

Thanks --Laura

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When starting a post, especially for the beginner there are a lot of buttons, check marks, icons etc. On some of them when you hover you get a very brief descriptions. In reading through some of the responses to the Developer Community Feedback there is a lot of good information.

Could one of the moderators, who know all the tricks put together a one or two page "cheat sheet?" or beginner guide?

This "Cheat Sheet" would be of great help!

I get the impression that there is a great push to encourage others to use the Developers Community.

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NewBie's Corner Session 26 Globals and Arrays Part 2

Welcome to NewBie's Corner, a weekly or biweekly post covering basic Caché Material.

Globals, Arrays, and Variables Part 2

A thorough understanding of Globals, Arrays, and Variables is foundational for every Caché developer.

Uniqueness of the Caché Global Structure or database

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Hello community,

I would like to know answer to the question: What would be an optimal way to connect an Ensemble and a pure Caché server? Optimally in such a way for the Caché system to be able to fire Ensemble processes and the Ensemble server to call Caché server functions.

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Several $System.OBJ methods have ByRef errorlog argument:

Compile(ByRef classes As %String = "", qspec As %String = "", ByRef errorlog As %String, recurse As %Boolean = 0)

ImportDir(dir As %String = "", wildcards As %String, qspec As %String = "", ByRef errorlog As %String, recurse As %Boolean = 0, ByRef imported As %String, listonly As %Boolean, ByRef selectedlist As %String)

What's the best approach of working with errorlog?

Do you convert it to status? If so - how? Manual iteration over local?

Is there some system method to convert it into %Status?

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