Problem with dictionary addon

[Devon McCormick]

Hi - I was putting together an intro to the new dictionary addon, at the latest NYCJUG meeting - https://code.jsoftware.com/wiki/NYCJUG/2026-01-13#Populating_a_Dictionary - and ran into some problems.

I want to build a dictionary with extended integers as a key and the factors of that integer as the corresponding value. However, specifying ('keytype'; 'extended') did not allow me load my data. As a work-around, I specified both key and value as type "boxed" and was able to populate the dictionary but retrieval failed. I also converted the numbers to characters as boxed numbers did not appear to work.

Most puzzlingly, it did not fail for every case so I must have done something right, or at least half-right. Here's how to reproduce the issue:

   ]nums=. 1+10^i.5x
2 11 101 1001 10001
   ]factors=. q:&.>nums
+-+--+---+-------+------+
|2|11|101|7 11 13|73 137|
+-+--+---+-------+------+
   params=: 'tree',&< ('keytype'; 'boxed') ,: ('valuetype'; 'boxed')
   prms=: params conew 'jdictionary'
   (":&.>nums) put__prms ":&.>factors    NB. Populate
   get__prms <":0{nums
+-+
|2|
+-+
   get__prms <":1{nums
+--+
|11|
+--+
   get__prms <":2{nums
+---+
|101|
+---+
   get__prms <":3{nums
|index error: get__prms
|get__prms[0]
      13!:19''
   get__prms <":4{nums
|index error: get__prms
|get__prms[0]
      13!:19''
   get__prms <":1{nums    NB. make sure this still works
+--+
|11|
+--+

Even more interestingly, when I did this same exercise with nums=. 1+10^i.10x, only the gets for 1 & 2 worked - 0 failed.

Please let me know what you think.

Devon McCormick

[Devon McCormick]

I just encountered this after defining a dictionary as

   prms=: ('tree',&< ('keytype'; 'extended') ,: ('valuetype'; 'boxed')) conew 'jdictionary'

When I entered put__prms for display, my session crashed:

      put__prms

Process shell<1> exited abnormally with code 5

[Marcin Żołek]

Great to see dictionaries featured in NYCJUG!

Regarding the first issue, the verbs put, get, has, and del take key(s) as their right argument. In put, the numbers and factors are swapped (factors are keys), so only prime numbers ended up with the same key and value in the dictionary.

Extended integers can be used as keys as well:

   ]nums=: 1+10^i.5x

2 11 101 1001 10001
   ]factors=. q:&.>nums

┌─┬──┬───┬───────┬──────┐
│2│11│101│7 11 13│73 137│
└─┴──┴───┴───────┴──────┘
   load 'dictionary'
   prms=: 'jdictionary' conew~ 'tree' ,&< ('keytype' ; 'extended') ,: 'valuetype' ; 'boxed'
   factors put__prms nums
   get__prms 2
┌─┐
│2│
└─┘
   get__prms _2 {. nums
┌───────┬──────┐
│7 11 13│73 137│
└───────┴──────┘

 

Marcin