LaTeX TeXt Placement movements

Question

I have looking for TeXT Placement movememnt in the class file. Requirement is store the value and print in another places.

My LaTeX code is:

\documentclass{threecolumn}
\usepackage{ifthen}
\begin{document}
\jnl{5}
\end{document}

and my class file is

\def\jnl#1{\protected@edef\@jnl{#1}}
\def\@jnl#1{%
\ifthenelse{\equal{#1}{1}}{Sample 1}{}%
\ifthenelse{\equal{#1}{2}}{Sample 2}{}%
\ifthenelse{\equal{#1}{3}}{Sample 3}{}
\ifthenelse{\equal{#1}{4}}{Sample 4}{}
\ifthenelse{\equal{#1}{5}}{Sample 5}{}
}

If \jnl{2} is found need to change the \jnl{Sample 2} and like to place in after \maketitle. How do achieve this in class file?

It is not clear to me what you are asking. Is it general conditional setting of macros, or a construction for case statements or ...? Note that the macros provided by etoolbox are to be preferred over those from ifthen, see http://tex.stackexchange.com/q/13866/15925 — Andrew Swann, Aug 03 '13 at 14:55

score 3 · Accepted Answer · answered Aug 03 '13 at 17:27

You want to use \protected@edef in a different way; with that code the definition of \@jnl will never be used. Moreover, \ifthenelse cannot be used in \protected@edef.

\documentclass{article}

\makeatletter % this shouldn't be used in the class file
\newcommand{\jnl}[1]{%
  \protected@edef\@jnl{%
    \ifcase#1%
     \relax\noexpand\threecolumn@error@jnl{#1}\or
     Sample 1\or
     Sample 2\or
     Sample 3\or
     Sample 4\or
     Sample 5\else
     \relax\noexpand\threecolumn@error@jnl{#1}\fi
  }
}
\newcommand\threecolumn@error@jnl[1]{%
  \ClassError{threecolumn}
    {Invalid argument to \protect\jnl}
    {The argument to \protect\jnl\space should be
     between 1 and 5 (included)}%
}
\makeatother % this shouldn't be used in the class file

\jnl{0}
\jnl{1}
\jnl{5}
\jnl{6}

In the first and last case, \@jnl will raise an error.

LaTeX TeXt Placement movements

1 Answers1