All Questions
Tagged with undocumented list-manipulation
10
questions
11
votes
2
answers
475
views
How can I create an atomic head or treat some head as atomic during Map?
For example,
Map[g, {0, {h[1, 2, 3]}}, {-1}]
gives
{g[0], {h[g[1], g[2], g[3]]}}
I want a ...
- 17.2k
2
votes
1
answer
276
views
Internal`CopyListStructure makes fatal error sometimes
Warning : At least in my PC (windows 10, mathematica V12.2), some of the codes here led to fatal error.
Fatal means mathematica will freeze + 'Abort Evaluation' will not work. I had to quit the kernel ...
- 4,315
13
votes
1
answer
197
views
Can't make more than 249 Internal`Bags in a Table
I need a lot of Internal`Bags so I made them with Table. It works fine for 249 or fewer Bags...
- 20.3k
13
votes
1
answer
484
views
Undocumented TableView function
Seeking information on undocumented function TableView. Exempli gratia,
tab=Table[Table[If[Mod[i,Prime[j]]==1,1,0],{i,1,10}],{j,1,2}]
tab//TableView
$ $
...
- 717
8
votes
2
answers
348
views
How to convert a RawArray of bytes to ByteArray?
A ByteArray can be converted to a RawArray:
...
- 236k
35
votes
1
answer
1k
views
How can I work with RawArray?
RawArray seems to be able to efficiently hold integer and floating point data of various sizes.
What is RawArray good for? How ...
- 236k
10
votes
1
answer
1k
views
Pareto optimal fronts using internal function?
Reading this question:
How do I estimate the Pareto front in my multiobjective optimization problem?
I found @Daniel Lichtbau's interesting answer. Yet I don't know how such an "internal function" ...
- 2,202
13
votes
2
answers
426
views
What does IndexBy do and how exactly does it work?
I just saw the function IndexBy in the autocomplete suggestions and I was curious to know exactly how it works. Unfortunately, there's no trace of it in the ...
- 10.3k
27
votes
1
answer
787
views
Undocumented form for Extract
Prompted by a comments conversation here, here's an interesting (and often performance enhancing) use of Extract:
...
- 25.9k
5
votes
0
answers
319
views
Strange behavior of undocumented RawArray and ArrayObject expressions [duplicate]
I discovered several strange results and inconsistencies while trying to understand what undocumented RawArray and ArrayObject ...
- 7,273