You will receive a string of comma-separated integers whose elements have both a negative and a positive value, except for one integer that is either only negative or only positive, our challenge will be to find that integer.
As usual shortest solution wins.





3 has no matching negative appearance

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A quine is a computer program which takes no input and produces a copy of its own source code as its only output.


How about a fun challenge?

The task is to write a quine in InterSystems ObjectScript. It can be a class, or a method, or a routine, or just a line to be executed in a terminal. You decide!

Here's some resources you might consider useful:

Hard mode: do not use source code access functions.

Here's my (extremely uninspired, I know) attempt:

Class User.Quine

/// do ##class(User.Quine).Test()
ClassMethod Test()
    set sc = ##class(%Compiler.UDL.TextServices).GetTextAsString($namespace, $classname(), .str)
    write str


It produces this output:

How many different ways of producing a quine are there in ObjectScript?

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Eduard Lebedyuk · Oct 8, 2021
Code Golf: Just add water...

Have you ever seen those vaccum compressed towels, that look like a pill and after you add water became a towel?

That's our challenge for today. As usual shortest solution wins.


You will receive an integer number and you will return a new number where each digit is repeated a number of times equals to its value.






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This year at Global Summit we will have several members of the InterSystems internal applications team (AppServices) on site to present topics of interest to developers.  There will be General Sessions that we teach on a number of topics related to tools we're launching to the OEX, knowledge gained based on migrating our Caché app portfolio to InterSystems IRIS, best practices for following OWASP Top 10 with ObjectScript, and a survey of the application landscape offering services to our customers and prospects.  

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The goal is to construct a comma separated string, using a loop but the same way $listtostring(var,",") would do (i.e. "a,b,c,d,e,f,g,h" without starting or ending comma).

What is the best way to do it, concerning the readability of the code and its performances?

To do so, there are more than 5 methods, but in this example we will test 4 :

1) using a "if" in the loop

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Eduard Lebedyuk · Nov 17, 2021
Code Golf - Encoder

We need to send some coordinates to a spaceship through a laser beam.
To do that we have to encode it, and beam it out into space.
Your mission is to implement the encoder with a compression standard.
As usual shortest solution wins.


You will receive a string of comma-separated integers and you will return a new string of comma-separated integers and sequence descriptors.





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Hi, Community!

Open Exchange (OEX) is getting more and more popular and more and more developers consider publishing their apps in the public package manager registry.

This is really great!

So the topic of thoughtful naming convention is getting more important and even critical.  Let's discuss?

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I am sure I came across this in the past with Cache and just saw this again in IRIS.

When rebuilding or swapping a DAT file for a database it retains the Resource of the DAT file, not the Resource of the Database it is being used for.

For instance, if I have a local Database called APP with a resource %DB_APP and I want to refresh the data from another Database called TEST that has a Resource %DB_TEST I can just copy the DAT file from the TEST folder to the APP folder.

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For me the best moments were:

1 - Global Masters WON the 2021 Influitive BAMMIE Award for Most Passionate Community

2 - Tech Article contests

3 - InterSystems Programming Contests

4 - 10,000+ DC members

5 - Partner directory and business services

6 - 500+ applications on OEX

7 - Open Virtual Summits

8 - Prizes from GM points

9  - Free online learning courses

10 - Discord channels

11 - Innovations from IRIS Data Platform

12 - Multilanguage communities, including portuguese, spanish and chinese community

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New month, new code golf!

You will receive a string with a label code with numbers and letters.
Our challenge is to check if this code begins with 1, 2, or 3 and ends with A, B, C, S, or R.
It should return true(1) if so or return false(0) otherwise.
As usual shortest solution wins.





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Evgeny Shvarov · Dec 28, 2021
On Datasets Licensing

Hi developers!

We launched the datasets contest.

And one of the important questions that need to be covered is dataset licensing.

There are two general cases:

a) a dataset you take from another place in public Internet or private network/person.

b) a dataset you create by yourself or own for any other reason.

We decided to follow the principles and considerations that site introduces for datasets' licensing.

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For all docker versions we have direct download links.

Like on our repository or on docker hub :

However, there is no direct link to download the installable (non docker) versions.

I propose you these two scripts to solve this need, the first one is with the wget command, the other one in curl.

5 1
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Carlos Sabel · Nov 19, 2021
Low-Code Platform

Intersystems recently announced a partnership with unqork. I would like to know if someone already used this tool, or another tool, and how was the experience. Is there within the intersystems ecosystem (partners) any low-code tool that generates COS? Tks

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Dmitry Maslennikov · Dec 15, 2021
UAE let’s meet

Hi, I’m recently decided to stay for some months in Dubai. And looking for new opportunities here, as well as even would like to meet in person with local people who works with InterSystems. I can share my knowledge and experience. What do you think? Do we have somebody from Dubai, or other from other parts of UAE?

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