how to compare list of functions from 2 files?











up vote
3
down vote

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I wanted to list all functions in 2 files I have, so I used:



cat <file_A> | grep -E "^function"

cat <file_B> | grep -E "^function"


How can I compare the outputs and highlight the similarities?






bash grep







share|improve this question


























    up vote
    3
    down vote

    favorite












    I wanted to list all functions in 2 files I have, so I used:



    cat <file_A> | grep -E "^function"
    
cat <file_B> | grep -E "^function"


    How can I compare the outputs and highlight the similarities?






    bash grep







    share|improve this question
























      up vote
      3
      down vote

      favorite









      up vote
      3
      down vote

      favorite











      I wanted to list all functions in 2 files I have, so I used:



      cat <file_A> | grep -E "^function"
      
cat <file_B> | grep -E "^function"


      How can I compare the outputs and highlight the similarities?






      bash grep







      share|improve this question













      I wanted to list all functions in 2 files I have, so I used:



      cat <file_A> | grep -E "^function"
      
cat <file_B> | grep -E "^function"


      How can I compare the outputs and highlight the similarities?






      bash grep




      bash grep






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 6 hours ago









      CIsForCookies

      1698




      1698






















          2 Answers
          2






          active

          oldest

          votes

















          up vote
          3
          down vote



          accepted










          Two options here:





          • if you need GUI solution - then you can use Meld Merge tool:



            sudo apt install meld
            

            
meld <(grep -E "^function" file_A) <(grep -E "^function" file_B)



          • if you need terminal solution - use power of diff:



            diff <(grep -E "^function" file_A) <(grep -E "^function" file_B)







          share|improve this answer























          • no way of doing so without saving output to files?
            – CIsForCookies
            6 hours ago


















          up vote
          3
          down vote













          You can use the process substitution functionality in this way:



          diff <(cat <file_A> | grep -E "^function") <(cat <file_B> | grep -E "^function")


          You do not need to use cat in this case. Also, there is a nice wrapper of diff called colordiff (it must be installed: sudo apt install colordiff). Here is one of my favorite usages:



          colordiff --side-by-side --left-column --width=180 --show-C-function <(grep -E "^function" <file_A>) <(grep -E "^function" <file_B>)





          share|improve this answer























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            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            3
            down vote



            accepted










            Two options here:





            • if you need GUI solution - then you can use Meld Merge tool:



              sudo apt install meld
              

              
meld <(grep -E "^function" file_A) <(grep -E "^function" file_B)



            • if you need terminal solution - use power of diff:



              diff <(grep -E "^function" file_A) <(grep -E "^function" file_B)







            share|improve this answer























            • no way of doing so without saving output to files?
              – CIsForCookies
              6 hours ago















            up vote
            3
            down vote



            accepted










            Two options here:





            • if you need GUI solution - then you can use Meld Merge tool:



              sudo apt install meld
              

              
meld <(grep -E "^function" file_A) <(grep -E "^function" file_B)



            • if you need terminal solution - use power of diff:



              diff <(grep -E "^function" file_A) <(grep -E "^function" file_B)







            share|improve this answer























            • no way of doing so without saving output to files?
              – CIsForCookies
              6 hours ago













            up vote
            3
            down vote



            accepted







            up vote
            3
            down vote



            accepted






            Two options here:





            • if you need GUI solution - then you can use Meld Merge tool:



              sudo apt install meld
              

              
meld <(grep -E "^function" file_A) <(grep -E "^function" file_B)



            • if you need terminal solution - use power of diff:



              diff <(grep -E "^function" file_A) <(grep -E "^function" file_B)







            share|improve this answer














            Two options here:





            • if you need GUI solution - then you can use Meld Merge tool:



              sudo apt install meld
              

              
meld <(grep -E "^function" file_A) <(grep -E "^function" file_B)



            • if you need terminal solution - use power of diff:



              diff <(grep -E "^function" file_A) <(grep -E "^function" file_B)








            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited 6 hours ago

























            answered 6 hours ago









            N0rbert

            20.2k54493




            20.2k54493












            • no way of doing so without saving output to files?
              – CIsForCookies
              6 hours ago


















            • no way of doing so without saving output to files?
              – CIsForCookies
              6 hours ago
















            no way of doing so without saving output to files?
            – CIsForCookies
            6 hours ago




            no way of doing so without saving output to files?
            – CIsForCookies
            6 hours ago












            up vote
            3
            down vote













            You can use the process substitution functionality in this way:



            diff <(cat <file_A> | grep -E "^function") <(cat <file_B> | grep -E "^function")


            You do not need to use cat in this case. Also, there is a nice wrapper of diff called colordiff (it must be installed: sudo apt install colordiff). Here is one of my favorite usages:



            colordiff --side-by-side --left-column --width=180 --show-C-function <(grep -E "^function" <file_A>) <(grep -E "^function" <file_B>)





            share|improve this answer



























              up vote
              3
              down vote













              You can use the process substitution functionality in this way:



              diff <(cat <file_A> | grep -E "^function") <(cat <file_B> | grep -E "^function")


              You do not need to use cat in this case. Also, there is a nice wrapper of diff called colordiff (it must be installed: sudo apt install colordiff). Here is one of my favorite usages:



              colordiff --side-by-side --left-column --width=180 --show-C-function <(grep -E "^function" <file_A>) <(grep -E "^function" <file_B>)





              share|improve this answer

























                up vote
                3
                down vote










                up vote
                3
                down vote









                You can use the process substitution functionality in this way:



                diff <(cat <file_A> | grep -E "^function") <(cat <file_B> | grep -E "^function")


                You do not need to use cat in this case. Also, there is a nice wrapper of diff called colordiff (it must be installed: sudo apt install colordiff). Here is one of my favorite usages:



                colordiff --side-by-side --left-column --width=180 --show-C-function <(grep -E "^function" <file_A>) <(grep -E "^function" <file_B>)





                share|improve this answer














                You can use the process substitution functionality in this way:



                diff <(cat <file_A> | grep -E "^function") <(cat <file_B> | grep -E "^function")


                You do not need to use cat in this case. Also, there is a nice wrapper of diff called colordiff (it must be installed: sudo apt install colordiff). Here is one of my favorite usages:



                colordiff --side-by-side --left-column --width=180 --show-C-function <(grep -E "^function" <file_A>) <(grep -E "^function" <file_B>)






                share|improve this answer














                share|improve this answer



                share|improve this answer








                edited 5 hours ago

























                answered 6 hours ago









                pa4080

                13.2k52461




                13.2k52461






























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