8.17.1 Top new questions this week

8.17.1.1 What secrets are hidden away in your init.m file and where do you place it? Please do share!
8.17.1.2 Which Mathematica versions have changed WolframLibraryVersion?
8.17.1.3 Fastest way to generate   a,a , a,b , a,c , b,b , b,c , c,c   from  a,b,c
8.17.1.4 Partitioning a list based on a criterion for sublists
8.17.1.5 What is idiomatic way to extract NumericArray from Image?
8.17.1.6 Arithmetic operations on NumericArrays
8.17.1.7 Scalloped edges to Plot3D with Disc domain
8.17.1.1 What secrets are hidden away in your init.m file and where do you place it? Please do share!

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268439

Help Build init.m Best Practices By Sharing or Critiquing Code 
Some of our most essential code is hidden away in a file that we can just drop and forget. Although contents of this infamous file should ... 
[performance-tuning] [programming] [files-and-directories] [kernel-startup] [initialization]
 
asked by Jules Manson https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=37721 Score of 23
answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 11
8.17.1.2 Which Mathematica versions have changed WolframLibraryVersion?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268643

A LibraryLink library compiled with headers having a certain  WolframLibraryVersion  will not work with Mathematica versions that support only earlier ... 
[librarylink]
 
asked by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 Score of 14
answered by Szabolcs https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12 Score of 11
8.17.1.3 Fastest way to generate   a,a , a,b , a,c , b,b , b,c , c,c   from  a,b,c

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268651

What is the fastest way to generate  {{a,a},{a,b},{a,c},{b,b},{b,c},{c,c}}  from  l={a,b,c} ? I've tried 
... 
[list-manipulation]
 
asked by Thrash https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=86530 Score of 13
answered by lericr https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=84894 Score of 19
8.17.1.4 Partitioning a list based on a criterion for sublists

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268488

 SeedRandom[1]; 
alist = RandomInteger[{1, 10}, 20] 
 
 
{2, 5, 1, 8, 1, 1, 9, 7, 1, 5, 2, 9, 6, 2, 2, 2, 4, 3, 2, 7} 
 
I would like to divide this list into sublists (... 
[list-manipulation] [performance-tuning] [programming] [partitions]
 
asked by Syed https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81355 Score of 13
answered by rhermans https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10397 Score of 15
8.17.1.5 What is idiomatic way to extract NumericArray from Image?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268616

It is easy to see that  NumericArray  is a construct underlying  Image : 
... 
[image] [undocumented] [conversion] [numeric-array]
 
asked by Alexey Popkov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=280 Score of 10
answered by Jason B. https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9490 Score of 11
8.17.1.6 Arithmetic operations on NumericArrays

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268633

Currently,  NumericArray s are directly supported by the most important array-related functions, what makes them a very attractive data structure for implementing ... 
[performance-tuning] [undocumented] [arithmetic] [numeric-array]
 
asked by Alexey Popkov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=280 Score of 9
answered by Sjoerd Smit https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=43522 Score of 9
8.17.1.7 Scalloped edges to Plot3D with Disc domain

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=268640

I'm running into problems with a weird edges to my Plot3D with a Disc domain. MWE: 
... 
[plotting]
 
asked by quixot https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=86659 Score of 7
answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 9