AllAccepted answers
Robert Cemper · Mar 30, 2020

PARAMETER and DISPLAYLIST are both compiler directives and you can't mix them.

But you may workaround it by writing your own pair of DisplayToLogical /  LogicalToDisplay ClassMethods for this property´.


Parameter Active = 1;
Parameter Inactive =2;
Parameter Production = 3;
Parameter Upkeep 4;

/// DISPLAYLIST = ", Active, Inactive, Production, Upkeep",
Property Status As %String(VALUELIST = ",1,2,3,4") [ Required ];

ClassMethod StatusDisplayToLogical(%val) As %String
{ Quit $case(%val,..#Active:1,..#Inactive:2,..#Production:3,..#Upkeep:4,:"") }

ClassMethod StatusLogicalToDisplay(%val) As %String
{ Quit $case(%val,1:..#Active,2:..#Inactive,3:..#Production,4:..#Upkeep,:"") }
 
Robert Cemper · Mar 30, 2020

Hi Nigel,
About a year ago a faced a similar problem and found 2 possible workarounds.

Instead of writing a WS client a delegated it out to JavaScript.
#1)  Using CSP
#2) my preferred one with node.js
Both examples are available on OpenExchange 

Client for WebSockets based on CSP

Client for WebSockets based on Node.js

as Websockets ar so natural to JavaScript the result is no rocket science.

Stay healthy 

Robert Cemper · Mar 29, 2020

@Julius Kavay is fully correct.

The compiler was first written ~10 years before the idea of LLVM started  @ University of  Illinois.
Various interfaces allow your development very close to the data store. 

I'd suggest you contact your Sales Engineer @ InterSystems (Darmstadt ?) for disclosure of internals. 
 

Robert Cemper · Mar 27, 2020

it is an IRIS export

<?xml version="1.0" encoding="UTF-8"?>

<Export generator="IRIS" version="26" zv="IRIS for Windows (x86-64) 2019.1.1 (Build 609U)" ts="2020-03-22 18:56:51">

 

while for Cache it ooks like this:

<?xml version="1.0" encoding="UTF-8"?>
<Export generator="Cache" version="25">
 

it might be sufficient to change 26 to 25 to make your Caché happy

Robert Cemper · Mar 27, 2020

I don't know of reverse  order

BUT if you have some idea of the last subscript you may enter the starting  subscript.

instead of seeing the whole Global ^CONFIG

just one specific  subscript ^CONFIG("Telnet"

os starting from a specific subscript ^CONFIG("Telnet":

or from:to subscript ^CONFIG("ECP":"Journal"

or just the select subscript level with a closing bracket ^CONFIG("ECP":"Journal")

Basically it is the same behavior  of the ancient (not to say antique) routine ^%G

When it was written traversing a Global in reverse order was not implemented in Caché nor ist'S predecessors.
So no reverse display

It has a help function that tells you it's capabilities  DO HELP^%G

The %G utility displays global nodes. A "?" at the "Global ^" prompt
displays the global directory. If you enter just the name of a global,
%G displays the entire global. You may also display a portion of the
global at different subscript levels or specific nodes.
 
A complete global reference, such as ^GLO(3,"BED",5) will display
only that particular node. You may specify a subtree, such as
^GLO(3,"BED", to display all descendants of that node. To display
both the node and its descendants, do not end your entry with a
comma or a right parenthesis.
 
You can leave a subscript field empty when you specify the subtree and
the %G utility displays any nodes matching the other subscripts:
^GLO(,"BED") will match any nodes with 'BED' as the second subscript.
 
You can specify a range of subscripts for a particular subscript
level by inserting a colon between the first and last subscript in the
range: ^PT(1,"ACC":"BIRTH"
 
You can use variables and simple expressions in a subscript
specification by assigning a value to the variable before calling %G.
For example SET ID=214 and enter something like ^PT(ID,0).
 
Robert Cemper · Mar 26, 2020

Hi Jenna,

my personal experience with binary over HTTP is painful.

I'd suggest using Base64-Encoding (which means ASCII readable Characters only)
The downside is you have to decode it at the receiver side.
But that way it should be foolproof over across all proxy-, web- and other servers in between. 
HTTP was invented when there was EBCDIC for 8 bit and ASCII for 7 bit.  And some transport software hasn't improved since. sad 
 

Robert Cemper · Mar 14, 2020

make your formula  f = x + 20(y*y) > z
a calculated, SQLcomputed property in your TABLE
and provide it with a bitmap index and it will run distributed and be incredible fast 

docs: 

https://docs.intersystems.com/iris20192/csp/docbook/DocBook.UI.Page.cls?KEY=GOBJ_proplit#GOBJ_proplit_computed
https://docs.intersystems.com/iris20192/csp/docbook/Doc.View.cls?KEY=RSQL_C145362