Différences

Ci-dessous, les différences entre deux révisions de la page.

--- 2_composition:macros:detecter_que_quelque_chose_est_vide [2018/06/02 17:37]
joseph.wright
+++ 2_composition:macros:detecter_que_quelque_chose_est_vide [2018/12/04 00:26]
jejust
@@ Ligne 1: / Ligne 1: @@
----
+====== Detecting that something is empty ======
-title: Detecting that something is empty
-category: programming
-tags: macros
-permalink: /FAQ-empty
-date: 2014-06-10
----
 Suppose you need to know that the argument of your command is empty:
-that is, to distinguish between `\cmd{}`
+that is, to distinguish between ''\cmd{}''
-and `\cmd{blah}`.  This is pretty simple:
+and ''\cmd{blah}''.  This is pretty simple:
-<!-- {% raw %} -->
-```latex
+<code latex>
 \def\cmd#1{%
   \def\tempa{}%
@@ Ligne 21: / Ligne 17: @@
   \fi
 }
-```
+</code>
-<!-- {% endraw %} -->
 The case where you want to ignore an argument that consists of nothing
 but spaces, rather than something completely empty, is more tricky.
-It's solved in the code fragment [`ifmtarg`](https://ctan.org/pkg/ifmtarg), which defines
+It's solved in the code fragment [[ctanpkg>ifmtarg|ifmtarg]], which defines
-commands `\@ifmtarg` and `\@ifnotmtarg`, which examine their
+commands ''\@ifmtarg'' and ''\@ifnotmtarg'', which examine their
 first argument, and select (in opposite directions) their second or
 third argument.  The package's code also appears in the LaTeX
-[`memoir`](https://ctan.org/pkg/memoir) class.
+[[ctanpkg>memoir|memoir]] class.
-[`Ifmtarg`](https://ctan.org/pkg/Ifmtarg) makes challenging reading; there's also a discussion of the
+[[ctanpkg>Ifmtarg|Ifmtarg]] makes challenging reading; there's also a discussion of the
-issue in number two of the ''around the bend'' articles by the late
+issue in number two of the "around the bend" articles by the late
 lamented Mike Downes.
+-----
+//Source:// [[faquk>FAQ-empty|Detecting that something is empty]]
+{{htmlmetatags>metatag-keywords=(LaTeX,programming)
+metatag-og:title=(Detecting that something is empty)
+metatag-og:site_name=(FAQ LaTeX francophone)
+}}