\documentclass{article}
\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
\tikzset{bead/.style={circle,fill=black,inner sep=3pt}}

\draw node[bead] {} (0,0)
\foreach \x [remember = \x as \lastx (initially 0)] in {10,40,50,-50,0,150,30,-60,45,45,0}
  { -- ++(\x:0.75) node[bead] {}};
\end{tikzpicture}

\end{document}

\def\angle{0}
\draw node[bead] {} (0,0)
\foreach \stepangle[evaluate=\stepangle as \angle using \angle+\stepangle, remember=\angle] in {10,20,-30,-60,135,-20,-30,0}
  { -- ++(\angle:1) node[bead]{}};

\documentclass{beamer}
\usepackage[T1]{fontenc}
\begin{document}
\begin{frame}[fragile]
\expandafter\detokenize\expandafter{\partlinkshort}

\def\temp#1#2{#2}
\edef\x{\noexpand\temp\partlinkshort{}}

\ifx\relax\x\relax
empty short part
\else
non-empty short part
\fi
\end{frame}

\end{document}

paulo@alexandria src$ texlua dandelion.lua
    _              _     _ _
 __| |__ _ _ _  __| |___| (_)___ _ _
/ _` / _` | ' \/ _` / -_) | / _ \ ' \
\__,_\__,_|_||_\__,_\___|_|_\___/_||_|

Copyright 2013, The LaTeX3 Project
All rights reserved.

             ,%%%%%%%%,
           ,%%/\%%%%/\%%
          ,%%%\c "" J/%%%
 %.       %%%%/ o  o \%%%
 `%%.     %%%%    _  |%%%
  `%%     `%%%%(__Y__)%%'
  //       ;%%%%`\-/%%%'
 ((       /  `%%%%%%%'
  \\    .'          |
   \\  /       \  | |
    \\/         ) | |

if v["author"] == "david" then
    -- there's no need to test,
    -- code works!
    v["passed"] = true
end

Changed serialization of BibTeX entries:

    First, the required, then the optional and then all other fields are written. Thereby, fields are now ordered by name. Except the title, which is written first.
    The second word in of the BibTeX type is capitalized. E.g., Inproceedings got InProceedings
    Configurable: Start field contents in same column. Enabled by default.
    Configurable: Use camel case for field names (e.g., HowPublished instead of howpublished). Enabled by default.
    If no field name is given, then UNKNOWN is used. For instance, = {X} gets UNKNOWN = {X}.

Added new BibTeX label pattern authEtAl
Added new BibTeX label pattern authForeIne, authorLastForeIni, edtrForeIni, and editorLastForeIni

Added Unicode to LaTeX conversion cleanup action

\documentclass{article}
\usepackage{tikz}

\makeatletter
\newcommand\textpalette[1]{%
  {\mathchoice
     {\mbox{\fontsize{\f@size}{\z@}\selectfont#1}}
     {\mbox{\fontsize{\f@size}{\z@}\selectfont#1}}
     {\mbox{\fontsize{\sf@size}{\z@}\selectfont#1}}
     {\mbox{\fontsize{\ssf@size}{\ssf@size}\selectfont#1}}
  }
}
\makeatother
\newcommand{\myarr}{%
  \textpalette{\tikz{ \draw [|->] (0,0) -- (.8em,0); }}%
}

\begin{document}
$V_\myarr$

$\myarr \scriptstyle \myarr \scriptscriptstyle \myarr$
\end{document}

\makeatletter
\newcommand{\code}[1]{$
  \medmuskip=0mu
  \mathcode`\.="2\hexnumber@{\tt@mathgroup\space}2E % period
  \mathcode`\-="2\hexnumber@{\tt@mathgroup\space}2D % hyphen
  \mathgroup\tt@mathgroup#1$}
\sbox0{$\mathtt{\xdef\tt@mathgroup{\the\fam}}$}
\makeatother

\documentclass[pstricks,border=12pt]{standalone}
\usepackage{pstricks-add}

\def\PlotPoints{50}
\def\f(#1){0.25*sin(2*Pi*(#1)/4)}

\psset
{
	plotpoints=\PlotPoints,
	algebraic,
}
\begin{document}
\begin{pspicture}(0,-1)(5,6)
	\psplot{0}{4}{\f(x+0.5)}
\end{pspicture}
\end{document}

\documentclass[pstricks,border=12pt]{standalone}
\usepackage{pstricks-add}

\def\PlotPoints{50}
\def\f(#1){0.25*sin(2*Pi*#1/4)}

\psset
{
	plotpoints=\PlotPoints,
	algebraic,
}
\begin{document}
\begin{pspicture}(0,-1)(5,6)
	\psplot{0}{4}{\f((x+0.5))}
\end{pspicture}
\end{document}