3.12.1 Top new questions this week

3.12.1.1 Looping over strings

http://tex.stackexchange.com/questions/359189/looping-over-strings

Having fun with strings, I found three different macros to loop over a string character by character. 
However, I am not very sure how they work exactly. 
Can somebody explain the mechanism of each of  ...
 

- asked by Raoul Kessels (12 votes), answered by David Carlisle (9 votes)

3.12.1.2 Setting up a Sans Serif Document Including Math (in 2017, using pdftex)

http://tex.stackexchange.com/questions/359530/setting-up-a-sans-serif-document-including-math-in-2017-using-pdftex

I try to set up an entire document using sans serif fonts including math. At the moment I would like to use pdftex. 
I searched the relevant questions and answers -- this is what I found: 
[based on  ...
 

- asked by Dr. Manuel Kuehner (12 votes), answered by Mico (7 votes)

3.12.1.3 How to write a macro that takes a variable number of arguments

http://tex.stackexchange.com/questions/359010/how-to-write-a-macro-that-takes-a-variable-number-of-arguments

I am trying to make a new command called \com which can do the following: 
If no argument is provided to \com, $\com$ produces the symbol $\lambda$. 
If one argument is provided, e.g. $\com{f}$, the  ...
 

- asked by user126499 (8 votes), answered by Christian Hupfer (10 votes)

3.12.1.4 biblatex philosophy-modern: a bug?

http://tex.stackexchange.com/questions/359058/biblatex-philosophy-modern-a-bug

I have found that philosophy-modern.bbx fails to start a new line when a translator (or anyone other than the author) is used instead of the author. 
The minimal example is given below. 
...
 

- asked by ashinpan (7 votes), answered by moewe (6 votes)

3.12.1.5 Missing bold and italic font in XeLaTeX

http://tex.stackexchange.com/questions/358900/missing-bold-and-italic-font-in-xelatex

Please see this MWE given below which tries to produce normal, bold and italic text in Bengali. 
\documentclass{article} 
% For a bilingual document 
\RequirePackage{fontspec} 
...
 

- asked by Masroor (7 votes), answered by TeXnician (10 votes)

3.12.1.6 Relational override symbol

http://tex.stackexchange.com/questions/360021/relational-override-symbol

Looking for a way to write the following infix binary operator, meaning "relational override":
 

- asked by Roly (6 votes), answered by egreg (9 votes)

3.12.1.7 Change default font within all tikzpicture environments

http://tex.stackexchange.com/questions/359570/change-default-font-within-all-tikzpicture-environments

I want to have all tikz graphics in \sffamily font. However, I cannot set a base font for tikz, as it will be overridden, whenever I user, e.g., font=\itshape, for a node locally. 
I tried to set a  ...
 

- asked by mr.VVoo (6 votes), answered by Paul Gaborit (3 votes)