11.32.1 Top new questions this week

11.32.1.1 Single $ sign fixes an error in NewDocumentCommand

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742265

For some reason, this macro creates no error 
\documentclass{article} 
\usepackage{xparse} 
\usepackage{amsmath} 
\NewDocumentCommand{\ex}{e{!}m}{ 
\exists\IfValueTF{#1}{!#1$}{#2} 
} 
\begin{document} 
$\... 
[macros] [xparse]
 

asked by Nolord https://tex.stackexchange.com/landing/r/digest?cta=user&id=278044 Score of 10

answered by cfr https://tex.stackexchange.com/landing/r/digest?cta=user&id=39222 Score of 9

11.32.1.2 Recommended practices when creating CTAN archives for packages for inclusion in multiple TeX distributions?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742374

How can I adapt the archives I upload to CTAN to avoid problems in MikTeX, while adhering to CTAN requirements and TeX Live recommendations? 
Judging by the issues tracker on GitHub, I am not the only ... 
[packages] [miktex] [texlive] [package-writing] [ctan]
 

asked by cfr https://tex.stackexchange.com/landing/r/digest?cta=user&id=39222 Score of 9

11.32.1.3 Make a square frame of equal size around some distinct characters

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742393

In order to display cards (AKQJT98765432) in a frame I have macro Fbox. 
The frames should be quadratic and all of the same size, adapted to the fontsize. 
I encounter 2 problems: 
The a^\200\230Qa^\200\231 has a depth ... 
[spacing] [fbox] [frame] [cards]
 

asked by Jack https://tex.stackexchange.com/landing/r/digest?cta=user&id=33338 Score of 8

answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 6

11.32.1.4 Add new glyph into an existing math font

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742429

I want to create a new glyph (parallel and equal to) into the Cambria Math font. So I proceed as follows: 
Copy Cambria Math.ttf 
Open it via fontforge 
Create a glyph in slot U+2427 (I don't know ... 
[unicode-math] [math-fonts]
 

asked by Stephen https://tex.stackexchange.com/landing/r/digest?cta=user&id=241621 Score of 8

answered by Khaled Hosny https://tex.stackexchange.com/landing/r/digest?cta=user&id=729 Score of 5

11.32.1.5 How to draw variations of tikz pictures without copy and pasting?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742558

I want to create the following tikz images: 
For now, I've just copy and pasted variations of the code below: 
\begin{tikzpicture}[scale=0.5] 
\tikzstyle{vertex}=[circle,draw,minimum size=10pt,... 
[tikz-pgf] [macros]
 

asked by Kenya https://tex.stackexchange.com/landing/r/digest?cta=user&id=394480 Score of 6

answered by DrM https://tex.stackexchange.com/landing/r/digest?cta=user&id=283669 Score of 9

11.32.1.6 Knuthian environment and Xparse

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742469

Consider the following code which creates a delimited command that creates a "Knuthian environment". In days bygone the argument against this type of construction was it could consume to ... 
[environments] [xparse]
 

asked by yannisl https://tex.stackexchange.com/landing/r/digest?cta=user&id=963 Score of 6

answered by Cicada https://tex.stackexchange.com/landing/r/digest?cta=user&id=316086 Score of 4

11.32.1.7 How can I adhere to the best practices when handling math for TikZ with Lua?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=742367

I use pgfmath for making 3D illustrations with TikZ, but want to convert it to Lua. 
I was informed that many people do not adhere to the most "bureaucratic" approach when incorporating Lua ... 
[tikz-pgf] [luatex] [best-practices] [directlua] [luatexbase]
 

asked by Jasper https://tex.stackexchange.com/landing/r/digest?cta=user&id=319072 Score of 6

answered by yannisl https://tex.stackexchange.com/landing/r/digest?cta=user&id=963 Score of 3