How can I grep for empty functions?












1














I'm recursively looking in a directory for all functions containing only a blank one-line comment, such as the following:



public function index()
{
//
}


I tried grep -PR "//$" * with no luck. Any help would be much appreciated, and thanks in advance.










share|improve this question







New contributor




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
















  • 1




    Doesn't grep -PR "^s*//s*$" * work?
    – terdon
    16 mins ago










  • It does. Thanks!
    – Brandon M.
    7 mins ago
















1














I'm recursively looking in a directory for all functions containing only a blank one-line comment, such as the following:



public function index()
{
//
}


I tried grep -PR "//$" * with no luck. Any help would be much appreciated, and thanks in advance.










share|improve this question







New contributor




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
















  • 1




    Doesn't grep -PR "^s*//s*$" * work?
    – terdon
    16 mins ago










  • It does. Thanks!
    – Brandon M.
    7 mins ago














1












1








1







I'm recursively looking in a directory for all functions containing only a blank one-line comment, such as the following:



public function index()
{
//
}


I tried grep -PR "//$" * with no luck. Any help would be much appreciated, and thanks in advance.










share|improve this question







New contributor




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











I'm recursively looking in a directory for all functions containing only a blank one-line comment, such as the following:



public function index()
{
//
}


I tried grep -PR "//$" * with no luck. Any help would be much appreciated, and thanks in advance.







shell grep regular-expression






share|improve this question







New contributor




Brandon M. 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




Brandon M. 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






New contributor




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









asked 19 mins ago









Brandon M.Brandon M.

1062




1062




New contributor




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





New contributor





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






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








  • 1




    Doesn't grep -PR "^s*//s*$" * work?
    – terdon
    16 mins ago










  • It does. Thanks!
    – Brandon M.
    7 mins ago














  • 1




    Doesn't grep -PR "^s*//s*$" * work?
    – terdon
    16 mins ago










  • It does. Thanks!
    – Brandon M.
    7 mins ago








1




1




Doesn't grep -PR "^s*//s*$" * work?
– terdon
16 mins ago




Doesn't grep -PR "^s*//s*$" * work?
– terdon
16 mins ago












It does. Thanks!
– Brandon M.
7 mins ago




It does. Thanks!
– Brandon M.
7 mins ago










1 Answer
1






active

oldest

votes


















0














Your grep is only matching // that are at the very end of the line. Your functions probably have whitespace characters after that. You might also want to allow whitespace before the //. so search for lines that consist entirely of 0 or more whitespace characters, then the // and then 0 or more whitespace characters:



grep -PR '^s*//s*$'




share





















    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',
    autoActivateHeartbeat: false,
    convertImagesToLinks: false,
    noModals: true,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    imageUploader: {
    brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
    contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
    allowUrls: true
    },
    onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    });


    }
    });






    Brandon M. 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%2f493068%2fhow-can-i-grep-for-empty-functions%23new-answer', 'question_page');
    }
    );

    Post as a guest















    Required, but never shown

























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0














    Your grep is only matching // that are at the very end of the line. Your functions probably have whitespace characters after that. You might also want to allow whitespace before the //. so search for lines that consist entirely of 0 or more whitespace characters, then the // and then 0 or more whitespace characters:



    grep -PR '^s*//s*$'




    share


























      0














      Your grep is only matching // that are at the very end of the line. Your functions probably have whitespace characters after that. You might also want to allow whitespace before the //. so search for lines that consist entirely of 0 or more whitespace characters, then the // and then 0 or more whitespace characters:



      grep -PR '^s*//s*$'




      share
























        0












        0








        0






        Your grep is only matching // that are at the very end of the line. Your functions probably have whitespace characters after that. You might also want to allow whitespace before the //. so search for lines that consist entirely of 0 or more whitespace characters, then the // and then 0 or more whitespace characters:



        grep -PR '^s*//s*$'




        share












        Your grep is only matching // that are at the very end of the line. Your functions probably have whitespace characters after that. You might also want to allow whitespace before the //. so search for lines that consist entirely of 0 or more whitespace characters, then the // and then 0 or more whitespace characters:



        grep -PR '^s*//s*$'





        share











        share


        share










        answered 4 mins ago









        terdonterdon

        129k31252427




        129k31252427






















            Brandon M. is a new contributor. Be nice, and check out our Code of Conduct.










            draft saved

            draft discarded


















            Brandon M. is a new contributor. Be nice, and check out our Code of Conduct.













            Brandon M. is a new contributor. Be nice, and check out our Code of Conduct.












            Brandon M. is a new contributor. Be nice, and check out our Code of Conduct.
















            Thanks for contributing an answer to Unix & Linux Stack Exchange!


            • Please be sure to answer the question. Provide details and share your research!

            But avoid



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            To learn more, see our tips on writing great answers.





            Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


            Please pay close attention to the following guidance:


            • Please be sure to answer the question. Provide details and share your research!

            But avoid



            • Asking for help, clarification, or responding to other answers.

            • Making statements based on opinion; back them up with references or personal experience.


            To learn more, see our tips on writing great answers.




            draft saved


            draft discarded














            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f493068%2fhow-can-i-grep-for-empty-functions%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown





















































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown

































            Required, but never shown














            Required, but never shown












            Required, but never shown







            Required, but never shown







            Popular posts from this blog

            濃尾地震

            How to rewrite equation of hyperbola in standard form

            No ethernet ip address in my vocore2