Detect empty or null output from xstring's StrBetween












0















I have some code for formatting names. However, the ifempty macro from xifthen is unable to detect empty/null output from xstring macros such as StrBetween. The same goes for the equal {} method. How can I detect empty output from StrBetween? The below code for some reason compiles and does not work.



documentclass{article}

usepackage{xstring}
usepackage{xifthen}

newcommand{name}{John Doe}

newcommand{middleinitial}{%
StrBetween{name}{ }{.}
}

newcommand{test}{%
ifthenelse{isempty{middleinitial}}%
{Whoo hoo!}%
{Fvck!}
}

begin{document}

test

end{document}


Any ideas?









share



























    0















    I have some code for formatting names. However, the ifempty macro from xifthen is unable to detect empty/null output from xstring macros such as StrBetween. The same goes for the equal {} method. How can I detect empty output from StrBetween? The below code for some reason compiles and does not work.



    documentclass{article}

    usepackage{xstring}
    usepackage{xifthen}

    newcommand{name}{John Doe}

    newcommand{middleinitial}{%
    StrBetween{name}{ }{.}
    }

    newcommand{test}{%
    ifthenelse{isempty{middleinitial}}%
    {Whoo hoo!}%
    {Fvck!}
    }

    begin{document}

    test

    end{document}


    Any ideas?









    share

























      0












      0








      0








      I have some code for formatting names. However, the ifempty macro from xifthen is unable to detect empty/null output from xstring macros such as StrBetween. The same goes for the equal {} method. How can I detect empty output from StrBetween? The below code for some reason compiles and does not work.



      documentclass{article}

      usepackage{xstring}
      usepackage{xifthen}

      newcommand{name}{John Doe}

      newcommand{middleinitial}{%
      StrBetween{name}{ }{.}
      }

      newcommand{test}{%
      ifthenelse{isempty{middleinitial}}%
      {Whoo hoo!}%
      {Fvck!}
      }

      begin{document}

      test

      end{document}


      Any ideas?









      share














      I have some code for formatting names. However, the ifempty macro from xifthen is unable to detect empty/null output from xstring macros such as StrBetween. The same goes for the equal {} method. How can I detect empty output from StrBetween? The below code for some reason compiles and does not work.



      documentclass{article}

      usepackage{xstring}
      usepackage{xifthen}

      newcommand{name}{John Doe}

      newcommand{middleinitial}{%
      StrBetween{name}{ }{.}
      }

      newcommand{test}{%
      ifthenelse{isempty{middleinitial}}%
      {Whoo hoo!}%
      {Fvck!}
      }

      begin{document}

      test

      end{document}


      Any ideas?







      xstring xifthen





      share












      share










      share



      share










      asked 6 mins ago









      Adam EricksonAdam Erickson

      1438




      1438






















          0






          active

          oldest

          votes











          Your Answer








          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "85"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: false,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f469915%2fdetect-empty-or-null-output-from-xstrings-strbetween%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          0






          active

          oldest

          votes








          0






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes
















          draft saved

          draft discarded




















































          Thanks for contributing an answer to TeX - LaTeX Stack Exchange!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2ftex.stackexchange.com%2fquestions%2f469915%2fdetect-empty-or-null-output-from-xstrings-strbetween%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          サソリ

          広島県道265号伴広島線

          Setup Asymptote in Texstudio