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--- tex:triky [2009/12/14 17:55]
bejcek vytvořeno: headers, lists
+++ tex:triky [2010/07/12 11:21]
bejcek latex packages
@@ Line 10: / Line 10: @@
   * Useful page (and a figure) for **lists**:
     * http://latex.computersci.org/Reference/ListEnvironments
+  * The **if** condition in TeX:
+    * construction **if ''\variable'' is empty**:
+      * ''The variable \if#\variable# is empty.\else contains \variable.\fi''\\ (''\variable'' naturally cannot contain '''#'****'')
+      * ''The variable \ifx\@empty\variable is empty.\else contains \variable.\fi''
+    * **comparing** two strings:\\ ''\newif\ifsame\\ \newcommand{\strcfstr}[2]{%\\ \ \samefalse\\ \ \begingroup\\ \ \ \def\1{#1}\def\2{#2}%\\ \ \ \ifx\1\2\endgroup \sametrue\\ \ \ \else   \endgroup\\ \ \ \fi}''
+      * (The grouping is needed there to make '\1' and '\2' local but '\sametrue' global.)
+      * [[http://www.tug.org/TUGboat/Articles/tb22-4/tb72wilson.pdf|(source, Peter Wilson)]]
+    * allocator **''\newif''** is used in a sequention:\\ a declaration ''\newif\ifsomething''\\ setting either ''\somethingtrue'' or ''\somethingfalse''\\ and asking ''\ifsomething YES\else NO\fi''
+  * **foreach** in TeX <html><font color="gray" size="-5">(thanks to TMA)</font></html>:
+    * If you want to ''\dothis{}'' with each word in ''\foreach{Peter, Paul, John, Ringo}'', you can do this as follows:
+      * ''\def\foreach#1{\first#1,,}''
+      * ''\def\first#1,{\if,#1,\else\dothis{#1}\expandafter\first\fi}''
+    * and then write something here:
+      * ''\def\dothis#1{ ... whatever #1 ... }''
+  * **Aligning an element** in the line according to whether it fits in the rest of the line (TeX)
+      * always right-aligned <html><font color="gray" size="-5">(from Petr Olšák's TeXbook naruby)</font></html>:
+<code>       \def\alignelemright #1\par{\unskip
+          \nobreak\hfill\penalty71\hskip2em\hbox{}\nobreak\hfill
+          \hbox{#1}\par}</code>
+        * always left-aligned:
+<code>        \def\alignelemleft #1\par{\unskip
+          \hbox{} \hskip 0pt plus 1fil \penalty0
+          \hbox{#1}\hskip 0pt plus 1fill\hbox{}\par}</code>
+      * align to the right, if it fits, or to the left in the new line:
+<code>       \def\alignelemrightorleft #1\par{\unskip
+          \nobreak\hfill\penalty71\hskip2em
+          \hbox{#1}\par}</code>
+  * Useful **packages**:
+    * Source printing: //''fancyvrb''//, //''listings''//
+    * //''fancyhdr''//
+    * pseudocode //''algorithmicx''//
+==== počítání slov (a dalších věcí) ====
+<code>texcount soubor.tex</code>
+''texcount -inc soubor.tex'' ... započítá správně slova i v souborech vložených v hlavním souboru pomocí ''\include''
+Podrobnosti v dokumentaci: ''texdoc texcount''

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