9.7.1 Top new questions this week

9.7.1.1 Why does Module slow down StringMatchQ by 180 times?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=280064

I knew that  Module  is slower than  With  or  Block , often by several times. But it surprises me ... 
[performance-tuning] [string-manipulation] [scoping] [timing]
 

asked by yurie https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=86893 Score of 10

answered by Lukas Lang https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36508 Score of 5

9.7.1.2 Replacing consecutive empty sublists with their run-lengths

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=280096

I have a list like this: 
... 
[list-manipulation] [replacement] [challenge-community]
 

asked by Giovanni Russo https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=90454 Score of 8

answered by Syed https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81355 Score of 8

9.7.1.3 How can I test if two inequalities have a common part?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=279911

I want to check whether $1 \leq x\leq2$ and $1.5\leq x\leq2.5$ have common part, what function can do this? 
[functions] [regions] [algebraic-manipulation] [inequalities]
 

asked by HANG YU https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=81212 Score of 8

answered by kirma https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=3056 Score of 9

9.7.1.4 How to use MMA to solve the minimal surface?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=279936

There is a great old post, but since MMA greatly improves the ability of solving differential equations, especially the Region can be used to define the range of variables. So I ask it again. As the ... 
[differential-equations] [finite-element-method] [differential-geometry]
 

asked by yode https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=21532 Score of 7

answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111 Score of 9

9.7.1.5 How do I pose Neumann boundary condition to suppress particles flux into zero point?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=279837

This is continuation from my previous post How to ensure for a solution of  NDSolve  to be positive? [https://mathematica.stackexchange.com/questions/278777/how-to-... 
[differential-equations] [finite-element-method] [boundary-condition-at-infinity] [stability]
 

asked by Igor Kotelnikov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=10081 Score of 7

answered by Alex Trounev https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=58388 Score of 2

9.7.1.6 Efficient way to store the terms of a summation in a list?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=279972

I have two matrices,  A  and  B  of the same dimension $Nr\times Nc$, with $Nr\gg Nc$. 
Essentially, I am trying to put all the terms ... 
[matrix] [parallelization]
 

asked by Saúl Herrera https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=90427 Score of 7

answered by Steven Roberts https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=48894 Score of 11

9.7.1.7 Map function with evaluated and unevaluated parameters

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=279840

Let's consider a function with evaluated and unevaluated arguments inside: 
 list1 = {1,2,3} 
list2 = {x,y,z} 
 
fun[list_]:={list,ToString@Unevaluated@list} 
 
When I use ... 
[evaluation] [map] [hold]
 

asked by Lechuu https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72560 Score of 7

answered by Nasser https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70 Score of 7