Preventing the join() command from adding extra space

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I am trying to use the join command to join multiple strings. The join command seems to add one character of space in between each of the strings. But I don't want any space added.



As an example, I'm working on a function that finds the associated .pdf file of a .tex file. So if I'm editing the file /home/user/paper.tex, I would like to create the string /home/user/paper.pdf. My attempt is



join([expand('%:p:r'), '.pdf'])


which returns /home/user/paper .pdf






whitespace join







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    up vote
    1
    down vote

    favorite












    I am trying to use the join command to join multiple strings. The join command seems to add one character of space in between each of the strings. But I don't want any space added.



    As an example, I'm working on a function that finds the associated .pdf file of a .tex file. So if I'm editing the file /home/user/paper.tex, I would like to create the string /home/user/paper.pdf. My attempt is



    join([expand('%:p:r'), '.pdf'])


    which returns /home/user/paper .pdf






    whitespace join







    share|improve this question























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I am trying to use the join command to join multiple strings. The join command seems to add one character of space in between each of the strings. But I don't want any space added.



      As an example, I'm working on a function that finds the associated .pdf file of a .tex file. So if I'm editing the file /home/user/paper.tex, I would like to create the string /home/user/paper.pdf. My attempt is



      join([expand('%:p:r'), '.pdf'])


      which returns /home/user/paper .pdf






      whitespace join







      share|improve this question













      I am trying to use the join command to join multiple strings. The join command seems to add one character of space in between each of the strings. But I don't want any space added.



      As an example, I'm working on a function that finds the associated .pdf file of a .tex file. So if I'm editing the file /home/user/paper.tex, I would like to create the string /home/user/paper.pdf. My attempt is



      join([expand('%:p:r'), '.pdf'])


      which returns /home/user/paper .pdf






      whitespace join




      whitespace join






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked yesterday









      wxyz

      204




      204




















          1 Answer
          1






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          up vote
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          down vote



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          From :help join():



          join(list [, sep])

           [..]

           When sep is specified it is put in between the items. If
           sep is omitted a single space is used.

           [..]


          So the solution is to add an empty string in the second sep parameter:



          :echo join([expand('%:p:r'), '.pdf'])
          /usr/share/vim/vim81/doc/eval .pdf

          :echo join([expand('%:p:r'), '.pdf'], '')
          /usr/share/vim/vim81/doc/eval.pdf


          In this case you don't really need to use join() by the way, and could just use:



          :echo expand('%:p:r') . '.pdf'





          share|improve this answer




















          • Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
            – wxyz
            yesterday






          • 2




            See :help expression-syntax . In this context '.' is string concatenation.
            – wbogacz
            yesterday











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          1 Answer
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          1 Answer
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          up vote
          4
          down vote



          accepted










          From :help join():



          join(list [, sep])

           [..]

           When sep is specified it is put in between the items. If
           sep is omitted a single space is used.

           [..]


          So the solution is to add an empty string in the second sep parameter:



          :echo join([expand('%:p:r'), '.pdf'])
          /usr/share/vim/vim81/doc/eval .pdf

          :echo join([expand('%:p:r'), '.pdf'], '')
          /usr/share/vim/vim81/doc/eval.pdf


          In this case you don't really need to use join() by the way, and could just use:



          :echo expand('%:p:r') . '.pdf'





          share|improve this answer




















          • Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
            – wxyz
            yesterday






          • 2




            See :help expression-syntax . In this context '.' is string concatenation.
            – wbogacz
            yesterday















          up vote
          4
          down vote



          accepted










          From :help join():



          join(list [, sep])

           [..]

           When sep is specified it is put in between the items. If
           sep is omitted a single space is used.

           [..]


          So the solution is to add an empty string in the second sep parameter:



          :echo join([expand('%:p:r'), '.pdf'])
          /usr/share/vim/vim81/doc/eval .pdf

          :echo join([expand('%:p:r'), '.pdf'], '')
          /usr/share/vim/vim81/doc/eval.pdf


          In this case you don't really need to use join() by the way, and could just use:



          :echo expand('%:p:r') . '.pdf'





          share|improve this answer




















          • Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
            – wxyz
            yesterday






          • 2




            See :help expression-syntax . In this context '.' is string concatenation.
            – wbogacz
            yesterday













          up vote
          4
          down vote



          accepted







          up vote
          4
          down vote



          accepted






          From :help join():



          join(list [, sep])

           [..]

           When sep is specified it is put in between the items. If
           sep is omitted a single space is used.

           [..]


          So the solution is to add an empty string in the second sep parameter:



          :echo join([expand('%:p:r'), '.pdf'])
          /usr/share/vim/vim81/doc/eval .pdf

          :echo join([expand('%:p:r'), '.pdf'], '')
          /usr/share/vim/vim81/doc/eval.pdf


          In this case you don't really need to use join() by the way, and could just use:



          :echo expand('%:p:r') . '.pdf'





          share|improve this answer












          From :help join():



          join(list [, sep])

           [..]

           When sep is specified it is put in between the items. If
           sep is omitted a single space is used.

           [..]


          So the solution is to add an empty string in the second sep parameter:



          :echo join([expand('%:p:r'), '.pdf'])
          /usr/share/vim/vim81/doc/eval .pdf

          :echo join([expand('%:p:r'), '.pdf'], '')
          /usr/share/vim/vim81/doc/eval.pdf


          In this case you don't really need to use join() by the way, and could just use:



          :echo expand('%:p:r') . '.pdf'






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered yesterday









          Martin Tournoij♦

          33.1k11101176




          33.1k11101176











          • Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
            – wxyz
            yesterday






          • 2




            See :help expression-syntax . In this context '.' is string concatenation.
            – wbogacz
            yesterday

















          • Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
            – wxyz
            yesterday






          • 2




            See :help expression-syntax . In this context '.' is string concatenation.
            – wbogacz
            yesterday
















          Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
          – wxyz
          yesterday




          Thanks. So in your last command, you have a period between the strings. I've seen a period used like that before, but I don't understand, what does it do?
          – wxyz
          yesterday




          2




          2




          See :help expression-syntax . In this context '.' is string concatenation.
          – wbogacz
          yesterday





          See :help expression-syntax . In this context '.' is string concatenation.
          – wbogacz
          yesterday


















           

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