How to understand the command awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
0
down vote

favorite












I'm new in awk so maybe my question might seem very basic but I need some help here, please



Command:



awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do:



awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file








share







New contributor




Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.























    up vote
    0
    down vote

    favorite












    I'm new in awk so maybe my question might seem very basic but I need some help here, please



    Command:



    awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


    I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



    Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do:



    awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file








    share







    New contributor




    Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm new in awk so maybe my question might seem very basic but I need some help here, please



      Command:



      awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


      I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



      Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do:



      awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file








      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I'm new in awk so maybe my question might seem very basic but I need some help here, please



      Command:



      awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


      I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



      Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do:



      awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file






      awk





      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share



      share






      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 1 min ago









      Zeineb Si Chaib

      1




      1




      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.

























          active

          oldest

          votes











          Your Answer







          StackExchange.ready(function()
          var channelOptions =
          tags: "".split(" "),
          id: "106"
          ;
          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',
          convertImagesToLinks: false,
          noModals: false,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: null,
          bindNavPrevention: true,
          postfix: "",
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          );



          );






          Zeineb Si Chaib is a new contributor. Be nice, and check out our Code of Conduct.









           

          draft saved


          draft discarded


















          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f474905%2fhow-to-understand-the-command-awk-forx-1x-nfxifx-0-00000-sub-0-00%23new-answer', 'question_page');

          );

          Post as a guest



































          active

          oldest

          votes













          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes








          Zeineb Si Chaib is a new contributor. Be nice, and check out our Code of Conduct.









           

          draft saved


          draft discarded


















          Zeineb Si Chaib is a new contributor. Be nice, and check out our Code of Conduct.












          Zeineb Si Chaib is a new contributor. Be nice, and check out our Code of Conduct.











          Zeineb Si Chaib is a new contributor. Be nice, and check out our Code of Conduct.













           


          draft saved


          draft discarded














          StackExchange.ready(
          function ()
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f474905%2fhow-to-understand-the-command-awk-forx-1x-nfxifx-0-00000-sub-0-00%23new-answer', 'question_page');

          );

          Post as a guest













































































          Popular posts from this blog

          How to check contact read email or not when send email to Individual?

          Displaying single band from multi-band raster using QGIS

          How many registers does an x86_64 CPU actually have?