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Re: How to switch two strings?

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  • Christian Brabandt
    Hi Peng! ... fu! SwapWords(...) range if len(a:000)!= 2 echomsg SwapWords has to be called with 2 Arguments! return elseif (search(a:1 , n ) == 0 ||
    Message 1 of 7 , Dec 1, 2009
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      Hi Peng!

      On Di, 01 Dez 2009, Peng Yu wrote:

      > I frequently need to switch two strings. For example, if I want to
      > switch 'a' and 'b', I shall use the following three commands. I'm
      > wondering if there is a more convenient way to do so.
      >
      > :%s/b/c/g
      > :%s/a/b/g
      > :%s/c/a/g
      >
      fu! <SID>SwapWords(...) range
      if len(a:000)!= 2
      echomsg "SwapWords has to be called with 2 Arguments!"
      return
      elseif (search(a:1 ,'n') == 0 || search(a:2, 'n') == 0)
      echomsg "not both args found"
      return
      endif

      let pat=join(map(copy(a:000), '"\\%(" .v:val. "\\)"'), '\|')
      :exe a:firstline . ',' . a:lastline . 's/'.pat. '/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'
      endfu

      com! -nargs=+ -range=% Swap :<line1>,<line2>call <SID>SwapWords(<f-args>)

      :Swap a b

      regards,
      Christian
      --
      :wq

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    • Peng Yu
      ... I try the above command in a file that has on the following line. a b But it only replaces a with b but not b with a . -- You received this message
      Message 2 of 7 , Dec 1, 2009
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        On Dec 1, 11:12 am, Christian Brabandt <cbli...@...> wrote:
        > Hi Peng!
        >
        > On Di, 01 Dez 2009, Peng Yu wrote:
        >
        > > I frequently need to switch two strings. For example, if I want to
        > > switch 'a' and 'b', I shall use the following three commands. I'm
        > > wondering if there is a more convenient way to do so.
        >
        > > :%s/b/c/g
        > > :%s/a/b/g
        > > :%s/c/a/g
        >
        > fu! <SID>SwapWords(...) range
        >     if len(a:000)!= 2
        >         echomsg "SwapWords has to be called with 2 Arguments!"
        >         return
        >     elseif (search(a:1 ,'n') == 0 || search(a:2, 'n') == 0)
        >         echomsg "not both args found"
        >         return
        >     endif
        >
        >     let pat=join(map(copy(a:000), '"\\%(" .v:val. "\\)"'), '\|')
        >     :exe a:firstline . ',' . a:lastline . 's/'.pat. '/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'
        > endfu
        >
        > com! -nargs=+ -range=% Swap :<line1>,<line2>call <SID>SwapWords(<f-args>)
        >
        > :Swap a b

        I try the above command in a file that has on the following line.

        a b

        But it only replaces 'a' with 'b' but not 'b' with 'a'.

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      • Christian Brabandt
        ... Oh yes, ... s/ .pat. / =printf( %s ,submatch(0)==a:1 ? a:2 : a:1 )/ to ... s/ .pat. / =printf( %s ,submatch(0)==a:1 ? a:2 : a:1 )/g regards, Christian
        Message 3 of 7 , Dec 1, 2009
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          On Wed, December 2, 2009 3:14 am, Peng Yu wrote:
          >
          >
          > On Dec 1, 11:12 am, Christian Brabandt <cbli...@...> wrote:
          >> Hi Peng!
          >>
          >> On Di, 01 Dez 2009, Peng Yu wrote:
          >>
          >> > I frequently need to switch two strings. For example, if I want to
          >> > switch 'a' and 'b', I shall use the following three commands. I'm
          >> > wondering if there is a more convenient way to do so.
          >>
          >> > :%s/b/c/g
          >> > :%s/a/b/g
          >> > :%s/c/a/g
          >>
          >> fu! <SID>SwapWords(...) range
          >>     if len(a:000)!= 2
          >>         echomsg "SwapWords has to be called with 2 Arguments!"
          >>         return
          >>     elseif (search(a:1 ,'n') == 0 || search(a:2, 'n') == 0)
          >>         echomsg "not both args found"
          >>         return
          >>     endif
          >>
          >>     let pat=join(map(copy(a:000), '"\\%(" .v:val. "\\)"'), '\|')
          >>     :exe a:firstline . ',' . a:lastline . 's/'.pat.
          >> '/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'
          >> endfu
          >>
          >> com! -nargs=+ -range=% Swap :<line1>,<line2>call
          >> <SID>SwapWords(<f-args>)
          >>
          >> :Swap a b
          >
          > I try the above command in a file that has on the following line.
          >
          > a b
          >
          > But it only replaces 'a' with 'b' but not 'b' with 'a'.

          Oh yes,
          Change this line:
          :exe a:firstline . ',' . a:lastline .
          's/'.pat.'/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'

          to

          :exe a:firstline . ',' . a:lastline .
          's/'.pat.'/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/g'

          regards,
          Christian

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        • redspider red
          Why not use macro? ... -- ... PDF ¸ñʽÊÇÊý×Ö»¯ÎĵµÊÂʵÉϵĹ¤Òµ±ê×¼£¬Ëü¿ÉÒÔ½«ÎÄ×Ö¡¢
          Message 4 of 7 , Dec 2, 2009
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            Why not use macro?

            2009/12/2 Christian Brabandt <cblists@...>:
            > On Wed, December 2, 2009 3:14 am, Peng Yu wrote:
            >>
            >>
            >> On Dec 1, 11:12 am, Christian Brabandt <cbli...@...> wrote:
            >>> Hi Peng!
            >>>
            >>> On Di, 01 Dez 2009, Peng Yu wrote:
            >>>
            >>> > I frequently need to switch two strings. For example, if I want to
            >>> > switch 'a' and 'b', I shall use the following three commands. I'm
            >>> > wondering if there is a more convenient way to do so.
            >>>
            >>> > :%s/b/c/g
            >>> > :%s/a/b/g
            >>> > :%s/c/a/g
            >>>
            >>> fu! <SID>SwapWords(...) range
            >>> if len(a:000)!= 2
            >>> echomsg "SwapWords has to be called with 2 Arguments!"
            >>> return
            >>> elseif (search(a:1 ,'n') == 0 || search(a:2, 'n') == 0)
            >>> echomsg "not both args found"
            >>> return
            >>> endif
            >>>
            >>> let pat=join(map(copy(a:000), '"\\%(" .v:val. "\\)"'), '\|')
            >>> :exe a:firstline . ',' . a:lastline . 's/'.pat.
            >>> '/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'
            >>> endfu
            >>>
            >>> com! -nargs=+ -range=% Swap :<line1>,<line2>call
            >>> <SID>SwapWords(<f-args>)
            >>>
            >>> :Swap a b
            >>
            >> I try the above command in a file that has on the following line.
            >>
            >> a b
            >>
            >> But it only replaces 'a' with 'b' but not 'b' with 'a'.
            >
            > Oh yes,
            > Change this line:
            > :exe a:firstline . ',' . a:lastline .
            > 's/'.pat.'/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/'
            >
            > to
            >
            > :exe a:firstline . ',' . a:lastline .
            > 's/'.pat.'/\=printf("%s",submatch(0)==a:1 ? a:2 : a:1 )/g'
            >
            > regards,
            > Christian
            >
            > --
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            > For more information, visit http://www.vim.org/maillist.php



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          • Christian Brabandt
            ... Because I like the flexibility, that a User command provides ( It has a name I can remember, allows to use tab completion and is more intuitive to use).
            Message 5 of 7 , Dec 2, 2009
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              On Thu, December 3, 2009 2:21 am, redspider red wrote:
              > Why not use macro?

              Because I like the flexibility, that a User command provides (
              It has a name I can remember, allows to use tab completion and
              is more intuitive to use).
              Plus I personally am too lazy to record and replay a macro each
              time I need it and generally think, user-defined functions are
              easier to understand.

              Oh and BTW: Please don't top post.

              regards,
              Christian
              --
              :wq

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