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I have a bibliography in which URLs are printed with a following "." I would like to omit the URLs to save space and I could do this by redefining the URL command, but this would leave me with a dot. Is there a way to define a command that eats a following "."?

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If all the URLs are in the form \url{...}., then redefine \url with two arguments to do nothing with them. Otherwise something slightly more complicated should be done. –  egreg Nov 14 '12 at 9:28
Maybe you can pick or design a bibliography style that will omit the url fields? That would look like a more natural way of doing it, for example in case you have urls elsewhere in your text. –  T. Verron Nov 14 '12 at 9:35
I have a bibliography that contains URLs they are set like \url{ ... }. I cannot influence this. So I have to redifine the url command to eat this dot. –  Stefan Müller Nov 14 '12 at 9:37
@StefanMüller: but it should be easy to modify your bibliography style file. –  Herbert Nov 14 '12 at 12:04
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2 Answers

up vote 14 down vote accepted
  • The redefinition of \url is not trivial, because the argument might contain the percent character. Therefore the argument needs to be read with verbatim catcodes.

  • The dot can be removed using \@ifnextchar.\@gobble{}. This also catches the case that \url{...} is not followed by a dot. As side effect \@ifnextchar removes spaces. This can be avoided by using \ltx@ifnextchar@nospace of package ltxcmds instead of \@ifnextchar.

Example file:

    % set verbatim catcodes
    % restore catcode of argument braces
    \catcode`\{=1 %
    \catcode`\}=2 %
  % eats the URL in #1
  % skip an optional dot

Normal url:

Skipped urls:


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Great answer (as usual); I've changed \urlgobble into \url in the final example, which seemed to be your intent, as \skipurl was given. –  egreg Nov 14 '12 at 10:31
@egreg Thanks, it was a leftover from testing that I have forgotten to revert. –  Heiko Oberdiek Nov 14 '12 at 10:47
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Works only if the URL has no special characters!




Not printed: \url{http://www.dante.de}.



enter image description here

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