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How do extract the string before the colon?



2019 Community Moderator ElectionHow to validate an email address in JavaScript?How to validate an email address using a regular expression?Regular expression to match a line that doesn't contain a word?How do you access the matched groups in a JavaScript regular expression?How do you use a variable in a regular expression?How do I make the first letter of a string uppercase in JavaScript?How to replace all occurrences of a string in JavaScriptWhat regex will match every character except comma ',' or semi-colon ';'?Python: Extract numbers from a stringHow to extract a substring using regex










-1















How do extract the string before the colon. I don't want the string after the colon.



Sample input:



asfmqwdbd/ilcp:dftqclk_repasfmq


Desired result:



asfmqwdbd/ilcp:dftqclk_rep


My code:



if (m/^(S+))
$inst_name = $1









share|improve this question









New contributor




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




















  • m/^([^s:]+)/ - if you meant before the first colon

    – Wiktor Stribiżew
    Mar 7 at 6:05












  • Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

    – Stefan Becker
    Mar 7 at 6:06











  • Shouldn't the desired result be asfmqwdbd/ilcp?

    – ikegami
    Mar 7 at 7:04















-1















How do extract the string before the colon. I don't want the string after the colon.



Sample input:



asfmqwdbd/ilcp:dftqclk_repasfmq


Desired result:



asfmqwdbd/ilcp:dftqclk_rep


My code:



if (m/^(S+))
$inst_name = $1









share|improve this question









New contributor




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




















  • m/^([^s:]+)/ - if you meant before the first colon

    – Wiktor Stribiżew
    Mar 7 at 6:05












  • Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

    – Stefan Becker
    Mar 7 at 6:06











  • Shouldn't the desired result be asfmqwdbd/ilcp?

    – ikegami
    Mar 7 at 7:04













-1












-1








-1








How do extract the string before the colon. I don't want the string after the colon.



Sample input:



asfmqwdbd/ilcp:dftqclk_repasfmq


Desired result:



asfmqwdbd/ilcp:dftqclk_rep


My code:



if (m/^(S+))
$inst_name = $1









share|improve this question









New contributor




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












How do extract the string before the colon. I don't want the string after the colon.



Sample input:



asfmqwdbd/ilcp:dftqclk_repasfmq


Desired result:



asfmqwdbd/ilcp:dftqclk_rep


My code:



if (m/^(S+))
$inst_name = $1






regex perl






share|improve this question









New contributor




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











share|improve this question









New contributor




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









share|improve this question




share|improve this question








edited Mar 7 at 7:04









ikegami

266k11178401




266k11178401






New contributor




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









asked Mar 7 at 5:07









Thibhika RavichandranThibhika Ravichandran

1




1




New contributor




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





New contributor





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






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












  • m/^([^s:]+)/ - if you meant before the first colon

    – Wiktor Stribiżew
    Mar 7 at 6:05












  • Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

    – Stefan Becker
    Mar 7 at 6:06











  • Shouldn't the desired result be asfmqwdbd/ilcp?

    – ikegami
    Mar 7 at 7:04

















  • m/^([^s:]+)/ - if you meant before the first colon

    – Wiktor Stribiżew
    Mar 7 at 6:05












  • Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

    – Stefan Becker
    Mar 7 at 6:06











  • Shouldn't the desired result be asfmqwdbd/ilcp?

    – ikegami
    Mar 7 at 7:04
















m/^([^s:]+)/ - if you meant before the first colon

– Wiktor Stribiżew
Mar 7 at 6:05






m/^([^s:]+)/ - if you meant before the first colon

– Wiktor Stribiżew
Mar 7 at 6:05














Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

– Stefan Becker
Mar 7 at 6:06





Can ypu please edit your question? Your example does not contain a semicolon ;. Did you mean colon :?

– Stefan Becker
Mar 7 at 6:06













Shouldn't the desired result be asfmqwdbd/ilcp?

– ikegami
Mar 7 at 7:04





Shouldn't the desired result be asfmqwdbd/ilcp?

– ikegami
Mar 7 at 7:04












3 Answers
3






active

oldest

votes


















1














Assuming that semicolon (;) was a typo in the question and you actually meant colon (:) this would be the correct regex:



  • anchor at beginning of line (^)

  • capture one-or-more non-colon characters (([^:]+))

  • match must end on a colon (:)

#!/usr/bin/perl
use warnings;
use strict;

while (<DATA>)
print "$1n" if /^([^:]+):/;


exit 0;

__DATA__
asfmqwdbd/ilcp
asfmqwdbd/ilcp:dftqclk_repasfmq
asfmqwdbd/ilcp;dftqclk_repasfmq


Test run:



$ perl dummy.pl
asfmqwdbd/ilcp





share|improve this answer






























    0














    Assuming from your question you want the output like this
    "asfmqwdbd/ilcp"
    for this you can use "^([S]+):" and then use $1.






    share|improve this answer






























      0














      I think you are looking for



      $ echo "asfmqwdbd/ilcp:dftqclk_repasfmq" | perl -pe 's/(S+):.*/$1/ '
      asfmqwdbd/ilcp


      or



      $ perl -le ' $x="asfmqwdbd/ilcp:dftqclk_repasfmq"; $x=~s/(S+):.*/$1/; print $x '
      asfmqwdbd/ilcp

      $





      share|improve this answer






















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        3 Answers
        3






        active

        oldest

        votes








        3 Answers
        3






        active

        oldest

        votes









        active

        oldest

        votes






        active

        oldest

        votes









        1














        Assuming that semicolon (;) was a typo in the question and you actually meant colon (:) this would be the correct regex:



        • anchor at beginning of line (^)

        • capture one-or-more non-colon characters (([^:]+))

        • match must end on a colon (:)

        #!/usr/bin/perl
        use warnings;
        use strict;

        while (<DATA>)
        print "$1n" if /^([^:]+):/;


        exit 0;

        __DATA__
        asfmqwdbd/ilcp
        asfmqwdbd/ilcp:dftqclk_repasfmq
        asfmqwdbd/ilcp;dftqclk_repasfmq


        Test run:



        $ perl dummy.pl
        asfmqwdbd/ilcp





        share|improve this answer



























          1














          Assuming that semicolon (;) was a typo in the question and you actually meant colon (:) this would be the correct regex:



          • anchor at beginning of line (^)

          • capture one-or-more non-colon characters (([^:]+))

          • match must end on a colon (:)

          #!/usr/bin/perl
          use warnings;
          use strict;

          while (<DATA>)
          print "$1n" if /^([^:]+):/;


          exit 0;

          __DATA__
          asfmqwdbd/ilcp
          asfmqwdbd/ilcp:dftqclk_repasfmq
          asfmqwdbd/ilcp;dftqclk_repasfmq


          Test run:



          $ perl dummy.pl
          asfmqwdbd/ilcp





          share|improve this answer

























            1












            1








            1







            Assuming that semicolon (;) was a typo in the question and you actually meant colon (:) this would be the correct regex:



            • anchor at beginning of line (^)

            • capture one-or-more non-colon characters (([^:]+))

            • match must end on a colon (:)

            #!/usr/bin/perl
            use warnings;
            use strict;

            while (<DATA>)
            print "$1n" if /^([^:]+):/;


            exit 0;

            __DATA__
            asfmqwdbd/ilcp
            asfmqwdbd/ilcp:dftqclk_repasfmq
            asfmqwdbd/ilcp;dftqclk_repasfmq


            Test run:



            $ perl dummy.pl
            asfmqwdbd/ilcp





            share|improve this answer













            Assuming that semicolon (;) was a typo in the question and you actually meant colon (:) this would be the correct regex:



            • anchor at beginning of line (^)

            • capture one-or-more non-colon characters (([^:]+))

            • match must end on a colon (:)

            #!/usr/bin/perl
            use warnings;
            use strict;

            while (<DATA>)
            print "$1n" if /^([^:]+):/;


            exit 0;

            __DATA__
            asfmqwdbd/ilcp
            asfmqwdbd/ilcp:dftqclk_repasfmq
            asfmqwdbd/ilcp;dftqclk_repasfmq


            Test run:



            $ perl dummy.pl
            asfmqwdbd/ilcp






            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Mar 7 at 6:11









            Stefan BeckerStefan Becker

            3,76211125




            3,76211125























                0














                Assuming from your question you want the output like this
                "asfmqwdbd/ilcp"
                for this you can use "^([S]+):" and then use $1.






                share|improve this answer



























                  0














                  Assuming from your question you want the output like this
                  "asfmqwdbd/ilcp"
                  for this you can use "^([S]+):" and then use $1.






                  share|improve this answer

























                    0












                    0








                    0







                    Assuming from your question you want the output like this
                    "asfmqwdbd/ilcp"
                    for this you can use "^([S]+):" and then use $1.






                    share|improve this answer













                    Assuming from your question you want the output like this
                    "asfmqwdbd/ilcp"
                    for this you can use "^([S]+):" and then use $1.







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Mar 7 at 10:28









                    Huban AhmedHuban Ahmed

                    41




                    41





















                        0














                        I think you are looking for



                        $ echo "asfmqwdbd/ilcp:dftqclk_repasfmq" | perl -pe 's/(S+):.*/$1/ '
                        asfmqwdbd/ilcp


                        or



                        $ perl -le ' $x="asfmqwdbd/ilcp:dftqclk_repasfmq"; $x=~s/(S+):.*/$1/; print $x '
                        asfmqwdbd/ilcp

                        $





                        share|improve this answer



























                          0














                          I think you are looking for



                          $ echo "asfmqwdbd/ilcp:dftqclk_repasfmq" | perl -pe 's/(S+):.*/$1/ '
                          asfmqwdbd/ilcp


                          or



                          $ perl -le ' $x="asfmqwdbd/ilcp:dftqclk_repasfmq"; $x=~s/(S+):.*/$1/; print $x '
                          asfmqwdbd/ilcp

                          $





                          share|improve this answer

























                            0












                            0








                            0







                            I think you are looking for



                            $ echo "asfmqwdbd/ilcp:dftqclk_repasfmq" | perl -pe 's/(S+):.*/$1/ '
                            asfmqwdbd/ilcp


                            or



                            $ perl -le ' $x="asfmqwdbd/ilcp:dftqclk_repasfmq"; $x=~s/(S+):.*/$1/; print $x '
                            asfmqwdbd/ilcp

                            $





                            share|improve this answer













                            I think you are looking for



                            $ echo "asfmqwdbd/ilcp:dftqclk_repasfmq" | perl -pe 's/(S+):.*/$1/ '
                            asfmqwdbd/ilcp


                            or



                            $ perl -le ' $x="asfmqwdbd/ilcp:dftqclk_repasfmq"; $x=~s/(S+):.*/$1/; print $x '
                            asfmqwdbd/ilcp

                            $






                            share|improve this answer












                            share|improve this answer



                            share|improve this answer










                            answered Mar 7 at 17:14









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