Order items using their references

Question

I try to sort enumerated lists in latex. All I found is how to sort items by their ordinal number (see Order items in enumerate environment automatically):

\documentclass{article}

\usepackage{pgffor}
\makeatletter
\newcounter{SortListTotal}
\newcommand{\sortitem}[1]{\stepcounter{SortListTotal}\expandafter\def\csname SortItem\arabic{SortListTotal}\endcsname{#1}}
\newcommand{\printsortlist}[1]{\@for\currentitem:=#1\do{\item\csname SortItem\currentitem\endcsname}\setcounter{SortListTotal}{0}}
\makeatother

\begin{document}

\begin{enumerate}
\sortitem{This is the third item.}
\sortitem{This is the fourth item.}
\sortitem{This is the first item.}
\sortitem{This is the second item.}
\printsortlist{3,4,1,2}
\end{enumerate}

\end{document}

Could you please help me how to rewrite \sortitem and \printsortlists such that I can use the following code:

\newcommand{\nc}{three,four,one,two}
\begin{enumerate}
\sortitem{one}{This is the third item.}
\sortitem{two}{This is the fourth item.}
\sortitem{three}{This is the first item.}
\sortitem{four}{This is the second item.}
\printsortlist{\nc}
\end{enumerate}

If it is not an easy task, I would also be happy if you provide an alternative solution to this problem.

Hm. You have now two variants, one with numbers and one with keywords. Which one do you really want? — Ulrike Fischer, Dec 03 '18 at 12:44
I would like to use keywords rather than numbers. The code containing numbers is the example which I found in tex.stackexchange.com. — Roloka, Dec 03 '18 at 12:46
I think it should be possible to combine https://tex.stackexchange.com/a/344002/ with your question, I will try it out and write an answer if it works. — Marijn, Dec 03 '18 at 12:49

score 2 · Accepted Answer · answered Dec 03 '18 at 12:51

2

\documentclass{article}

\usepackage{xparse}
\ExplSyntaxOn
\prop_new:N \g__rol_sortlist_prop
\NewDocumentCommand\sortitem { m m }
 {
  \prop_gput:Nnn\g__rol_sortlist_prop { #1 }{ # 2}
 }

\NewDocumentCommand \printsortlist { m }
 {
  \clist_set:No \l_tmpa_clist { #1 }
  \clist_map_inline:Nn \l_tmpa_clist 
   {
    \item \prop_item:Nn \g__rol_sortlist_prop {##1} 
   }       
 }  
\ExplSyntaxOff

\begin{document}

\newcommand{\nc}{three,four,one,two}
\begin{enumerate}
\sortitem{one}{This is the third item.}
\sortitem{two}{This is the fourth item.}
\sortitem{three}{This is the first item.}
\sortitem{four}{This is the second item.}
\printsortlist{\nc}
\end{enumerate}

\end{document}

answered Dec 03 '18 at 12:51

Ulrike Fischer

327,261

Beat me to it :) +1 – Marijn Dec 03 '18 at 12:59
Thank you, it works fine! If I could upvote your answer, I would do it. – Roloka Dec 03 '18 at 13:00
@Roloka why should you not be able to upvote and accept the answer? It is your question. – Ulrike Fischer Dec 03 '18 at 13:03
I received the following message: "Thanks for the feedback! Votes cast by those with less than 15 reputation are recorded, but do not change the publicly displayed post score." – Roloka Dec 03 '18 at 13:07
1

I had forgotten. It should work now. – Ulrike Fischer Dec 03 '18 at 13:08

Order items using their references

1 Answers1