sed : replace 1 word without repeating the rest of the sentence

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1
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I have the following pattern :



foo bar


with foo being always the same, but bar can change. I have an hash table that, for each value of bar, has a new one. What I do now is:



sed -i 's/foo bar/foo new_value/g' file


I am pretty sure there is a way to avoid repeating the foo in the replacement string. Does sed provide something like this ? Like



sed -i 's/foo @@bar@@/new_value/g' file


@@string@@ being the value that has to be replaced.










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    up vote
    1
    down vote

    favorite












    I have the following pattern :



    foo bar


    with foo being always the same, but bar can change. I have an hash table that, for each value of bar, has a new one. What I do now is:



    sed -i 's/foo bar/foo new_value/g' file


    I am pretty sure there is a way to avoid repeating the foo in the replacement string. Does sed provide something like this ? Like



    sed -i 's/foo @@bar@@/new_value/g' file


    @@string@@ being the value that has to be replaced.










    share|improve this question

























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      I have the following pattern :



      foo bar


      with foo being always the same, but bar can change. I have an hash table that, for each value of bar, has a new one. What I do now is:



      sed -i 's/foo bar/foo new_value/g' file


      I am pretty sure there is a way to avoid repeating the foo in the replacement string. Does sed provide something like this ? Like



      sed -i 's/foo @@bar@@/new_value/g' file


      @@string@@ being the value that has to be replaced.










      share|improve this question















      I have the following pattern :



      foo bar


      with foo being always the same, but bar can change. I have an hash table that, for each value of bar, has a new one. What I do now is:



      sed -i 's/foo bar/foo new_value/g' file


      I am pretty sure there is a way to avoid repeating the foo in the replacement string. Does sed provide something like this ? Like



      sed -i 's/foo @@bar@@/new_value/g' file


      @@string@@ being the value that has to be replaced.







      sed






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 25 at 15:13









      Rui F Ribeiro

      38.3k1476127




      38.3k1476127










      asked Oct 24 '14 at 9:07









      EddaSnorra

      1132




      1132




















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          sed -i 's/(foo )bar/1new_value/g' file



          The ( )sequence "captures" the text which then can be placed in the replacement string as 1. This can be done multiple times, the digit in 1 indicates which captured text to use. Captured text is counted in order of ( order.






          share|improve this answer




















          • Please mark the answer as correct if it works for you :-)
            – wurtel
            Oct 24 '14 at 9:13










          • I will as soon as I can (10 minute delay).
            – EddaSnorra
            Oct 24 '14 at 9:17










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          1 Answer
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          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          up vote
          0
          down vote



          accepted










          sed -i 's/(foo )bar/1new_value/g' file



          The ( )sequence "captures" the text which then can be placed in the replacement string as 1. This can be done multiple times, the digit in 1 indicates which captured text to use. Captured text is counted in order of ( order.






          share|improve this answer




















          • Please mark the answer as correct if it works for you :-)
            – wurtel
            Oct 24 '14 at 9:13










          • I will as soon as I can (10 minute delay).
            – EddaSnorra
            Oct 24 '14 at 9:17














          up vote
          0
          down vote



          accepted










          sed -i 's/(foo )bar/1new_value/g' file



          The ( )sequence "captures" the text which then can be placed in the replacement string as 1. This can be done multiple times, the digit in 1 indicates which captured text to use. Captured text is counted in order of ( order.






          share|improve this answer




















          • Please mark the answer as correct if it works for you :-)
            – wurtel
            Oct 24 '14 at 9:13










          • I will as soon as I can (10 minute delay).
            – EddaSnorra
            Oct 24 '14 at 9:17












          up vote
          0
          down vote



          accepted







          up vote
          0
          down vote



          accepted






          sed -i 's/(foo )bar/1new_value/g' file



          The ( )sequence "captures" the text which then can be placed in the replacement string as 1. This can be done multiple times, the digit in 1 indicates which captured text to use. Captured text is counted in order of ( order.






          share|improve this answer












          sed -i 's/(foo )bar/1new_value/g' file



          The ( )sequence "captures" the text which then can be placed in the replacement string as 1. This can be done multiple times, the digit in 1 indicates which captured text to use. Captured text is counted in order of ( order.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Oct 24 '14 at 9:10









          wurtel

          9,66011325




          9,66011325











          • Please mark the answer as correct if it works for you :-)
            – wurtel
            Oct 24 '14 at 9:13










          • I will as soon as I can (10 minute delay).
            – EddaSnorra
            Oct 24 '14 at 9:17
















          • Please mark the answer as correct if it works for you :-)
            – wurtel
            Oct 24 '14 at 9:13










          • I will as soon as I can (10 minute delay).
            – EddaSnorra
            Oct 24 '14 at 9:17















          Please mark the answer as correct if it works for you :-)
          – wurtel
          Oct 24 '14 at 9:13




          Please mark the answer as correct if it works for you :-)
          – wurtel
          Oct 24 '14 at 9:13












          I will as soon as I can (10 minute delay).
          – EddaSnorra
          Oct 24 '14 at 9:17




          I will as soon as I can (10 minute delay).
          – EddaSnorra
          Oct 24 '14 at 9:17

















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