8.12.1 Top new questions this week

8.12.1.1 How can I generate a list of combinations of string joins?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266536

Suppose I have the string lists  {'a','b','c'}  and  {'1','2','3'} . How do I get Mathematica to generate the list ... 
[string-manipulation]
 

asked by Kim Fierens https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5015 Score of 12

answered by ubpdqn https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1997 Score of 17

8.12.1.2 How to use Python functions in Mathematica functions in Python notebooks?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266451

I want to plot things with Mathematica, inside an ipynb Python notebook. I can easily plot functions that are expressed in the Wolfram Language, e.g. with 
... 
[plotting] [python]
 

asked by JEM_Mosig https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=35390 Score of 10

answered by Ben Izd https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=77079 Score of 8

8.12.1.3 Why AppendTo is much faster than Table for tracking object movement

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266462

I need to track some objects, the simplified version something like this 
... 
[list-manipulation] [performance-tuning]
 

asked by matrix89 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=5379 Score of 9

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 13

8.12.1.4 Replace 'n'-th occurence with number 'n'

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266518

How can I replace n-th occurence with number n for string/for list? 
For string : 
... 
[list-manipulation] [function-construction] [replacement] [pattern-matching] [string-manipulation]
 

asked by imida k https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=34532 Score of 8

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 11

8.12.1.5 Quarter a given triangular meshregion

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266505

For a given , examplary simple, triangular meshregion 
... 
[finite-element-method] [mesh]
 

asked by Ulrich Neumann https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53677 Score of 8

answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999 Score of 10

8.12.1.6 How do I flatten a matrix of lists while maintaining the structure of the list?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266380

I have a 2x2 matrix of lists. For example, the matrix I am working with looks like 
 matrix = {{{a,b,c}, {e,f,g}}, {{h,i,j}, {k,l,m}}} 
 
I want to define a function ... 
[list-manipulation] [matrix]
 

asked by xcodeking https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=85962 Score of 8

answered by Coolwater https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9754 Score of 13

8.12.1.7 How to do boolean operations between a large amount of regions

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=266395

I want to do boolean operations between a large amount of regions. 
For convenience, I consider a simplified problem. 
The problem is as follows, digging out a large number of small hemispheres on the ... 
[finite-element-method] [regions] [mesh] [3d-printing] [opencascade]
 

asked by hadesth https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=62891 Score of 8

answered by user21 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=18437 Score of 6