문자열 정렬에 대해서는 DohyunKim 님의 http://www.ktug.or.kr/xe/index.php?document_srl=33728 이 있다.

다음 소스는 xfor 패키지에서 가져온 것으로 원래 숫자에 대해서만 삽입정렬하게 한 것인데 윗글의 \pdfstrcmp를 이용하여 문자열 정렬을 시도해보았다.

정렬 방식은 삽입정렬(insertion sort)

\documentclass{oblivoir}

\usepackage{xfor}

\makeatletter

\newcommand{\insertinto}[2]{%

\def\nlst{}% new list initially empty

\@for\n:=#2\do{%

% store new list in \toks@

\expandafter\toks@\expandafter{\nlst}%

% test current value against new value

%%%\ifnum\n>#1\relax %%%

\ifnum\pdfstrcmp{\n}{#1}=1\relax

% new value needs to be inserted before current value

\edef\newstuff{#1,\n}%

% end for loop at the end of this iteration

\@endfortrue

\else

\edef\newstuff{\n}%

\fi

% append new stuff to new list

\ifx\nlst\@empty

\edef\nlst{\newstuff}%

\else

\edef\nlst{\the\toks@,\newstuff}%

\fi

}%

% check to see if for loop was prematurely terminated

\if@endfor

% loop may have been terminated during final iteration, in

% which case \@forremainder is empty.

\ifx\@forremainder\@empty

% do nothing

\else

% loop prematurely ended, append remainder of original list

% to new list

\expandafter\toks@\expandafter{\nlst}%

\edef\nlst{\the\toks@,\@forremainder}%

\fi

\else

% wasn't prematurely terminated, so new value hasn't been added

% so add now.

\expandafter\toks@\expandafter{\nlst}%

\ifx\nlst\@empty

\edef\nlst{#1}%

\else

\edef\nlst{\the\toks@,#1}%

\fi

\fi

\global\let#2=\nlst

}

\newcommand*{\insertionsort}[1]{%

\def\sortedlist{}%

\@for\val:=#1\do{{\insertinto{\val}{\sortedlist}}}%

\let#1=\sortedlist

}

\makeatother

\begin{document}

\def\chlist{받,은,편,지,함,의,메,일,을,모,두,읽,으,셨,습,니,다}

\insertionsort{\chlist}

\chlist

\def\chlist{{독도는},{우리},{땅이다},{민족},{국가},{자유}}

\insertionsort{\chlist}

\chlist

\end{document}

결과: