• Login
Community
  • Login

Using sets to find A-Za-z plus the # and - chars ..?

Scheduled Pinned Locked Moved Help wanted · · · – – – · · ·
23 Posts 6 Posters 1.6k Views
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • I
    IanSunlun @PeterJones
    last edited by Nov 17, 2022, 4:02 PM

    @PeterJones Ah, thats seems to work thanks.
    Does [\w%#.~-]+ put whatever it matches into ${1} ?

    P 2 Replies Last reply Nov 17, 2022, 4:02 PM Reply Quote 0
    • P
      PeterJones @IanSunlun
      last edited by PeterJones Nov 17, 2022, 4:04 PM Nov 17, 2022, 4:02 PM

      This post is deleted!
      1 Reply Last reply Reply Quote 0
      • P
        PeterJones @José Luis Montero Castellanos
        last edited by Nov 17, 2022, 4:06 PM

        This post is deleted!
        1 Reply Last reply Reply Quote 0
        • P
          PeterJones @IanSunlun
          last edited by PeterJones Nov 17, 2022, 4:23 PM Nov 17, 2022, 4:11 PM

          @IanSunlun said in Using sets to find A-Za-z plus the # and - chars ..?:

          Does [\w%#.~-]+ put whatever it matches into ${1} ?

          Sorry, when I answered, I had forgotten that you previously said,

          (So I need to store pagename in ${1} and bookmark in ${2}.)

          Putting the # into either match is not what you want, either. You really need two groups, one before the # and one after.

          FIND = http://mysitename.net/index.php/([\w%.~-]+)#([\w%.~-]+)"
          will only match if there is a bookmark, and the # will not be inside the ${2} group. If you want the # to be included in ${2}, use http://mysitename.net/index.php/([\w%.~-]+)(#[\w%.~-]+)"

          I 1 Reply Last reply Nov 17, 2022, 4:26 PM Reply Quote 2
          • I
            IanSunlun @PeterJones
            last edited by IanSunlun Nov 17, 2022, 4:28 PM Nov 17, 2022, 4:26 PM

            @PeterJones said in Using sets to find A-Za-z plus the # and - chars ..?:

            FIND = http://mysitename.net/index.php/([\w%.~-]+)#([\w%.~-]+) "

            With the period . inbetween the % and the ~ it did not find:
            http://mysitename.net/index.php/New_Video#column-one"
            But taking the period out, it did find it.
            Whats the thinking behind the period in this context ?

            P 1 Reply Last reply Nov 17, 2022, 5:17 PM Reply Quote 0
            • P
              PeterJones @IanSunlun
              last edited by PeterJones Nov 17, 2022, 6:46 PM Nov 17, 2022, 5:17 PM

              @IanSunlun ,

              Except for -, order doesn’t matter inside the [] character class. The period is there because New.Video#column-one is also a valid URL ender end-string.

              FIND = http://mysitename.net/index.php/([\w%.~-]+)#([\w%.~-]+)"
              does match http://mysitename.net/index.php/New_Video#column-one":

              2fb36c05-cd1f-406d-92f6-ec71aec5bb2a-image.png

              A 1 Reply Last reply Nov 17, 2022, 7:46 PM Reply Quote 2
              • A
                Alan Kilborn @PeterJones
                last edited by Nov 17, 2022, 7:46 PM

                @PeterJones said in Using sets to find A-Za-z plus the # and - chars ..?:

                FIND = http://mysitename.net/index.php/([\w%.~-]+)#([\w%.~-]+) "

                Is it worth pointing out that the first two periods here really aren’t periods but rather “match any char”, because they aren’t escaped? Sure, an unescaped . will match a literal period, but it will match other things as well (obviously).

                IMO, OP here needs to stop asking forum questions and go off and study regex.

                1 Reply Last reply Reply Quote 1
                • G
                  guy038
                  last edited by guy038 Nov 18, 2022, 11:58 AM Nov 18, 2022, 11:39 AM

                  Hello, @peterjones,

                  In the post below, Peter :

                  https://community.notepad-plus-plus.org/post/81643

                  You said :

                  Actually, it’s not documented in our character classes section. I will remedy that.

                  Then, regarding the Character Class feature, may be, this part could be added to the Official Notepad++ Documentation : :

                  If we consider the following CHARACTER CLASS structure :
                  
                  [.......]
                  123456789
                  
                  The POSSIBLE location(s), in order to find the LITERAL character below, are :
                  
                  LITERAL Character [    :     POSSIBLE at any position, BETWEEN 2 to 8 
                                               POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                  							 
                  LITERAL Character ]    :     POSSIBLE at position 2 ONLY
                                               POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                  							 
                  LITERAL Character -    :     POSSIBLE at position 2
                                               POSSIBLE at position 8
                                               POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                  							 
                  LITERAL Character \    :     POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                  

                  Of course, change this layout as you like !

                  Best Regards,

                  guy038

                  A 1 Reply Last reply Nov 18, 2022, 12:34 PM Reply Quote 2
                  • A
                    Alan Kilborn @guy038
                    last edited by Alan Kilborn Nov 18, 2022, 12:35 PM Nov 18, 2022, 12:34 PM

                    @guy038

                    It is rather awkward to express, but I like your idea.

                    My idea for expression:

                    • To use a “literal [” in a character class: Use it directly like any other character, e.g. [ab[c]; “escaping” is not necessary (but is permissible), e.g. [ab\\[c]

                    • To use a “literal ]” in a character class: Directly right after the opening [ of the class notation, e.g. []abc], OR “escaped” at any position, e.g. [\\]abc] or [a\\]bc]

                    • To use a “literal -” in a character class: Directly as the first or last character in the enclosing class notation, e.g. [-abc] or [abc-], OR “escaped” at any position, e.g. [\-abc] or [a\-bc]

                    • To use a “literal \” in a character class: Must be doubled (i.e., \\) inside the enclosing class notation, e.g. [ab\\c]

                    P 1 Reply Last reply Nov 18, 2022, 2:14 PM Reply Quote 2
                    • P
                      PeterJones @Alan Kilborn
                      last edited by Nov 18, 2022, 2:14 PM

                      @Alan-Kilborn & @guy038 ,

                      I like those suggestions, especially the way Alan rephrased it: it works much better than my clunky first attempt in the manual, that only included - and was not not very readable.

                      Thanks.

                      A 1 Reply Last reply Nov 18, 2022, 2:24 PM Reply Quote 2
                      • A
                        Alan Kilborn @PeterJones
                        last edited by Alan Kilborn Nov 18, 2022, 3:22 PM Nov 18, 2022, 2:24 PM

                        @PeterJones

                        Maybe my first-of-4 bullet points previously should be moved to be the last-of-4, and changed to:

                        • To use any other literal character in a character class, just use it directly, i.e., no “escaping” needed

                        Maybe it works well as a 2 column 4 row table, headers:

                        • Character
                        • To use it literally in a character class

                        With those headers, the “cell contents” for column 2 could be appropriately shortened to remove redundant verbiage.

                        1 Reply Last reply Reply Quote 1
                        • G
                          guy038
                          last edited by Nov 18, 2022, 3:54 PM

                          Hi, @peterjones,

                          BTW, Peter, do you intend to include, in some way, the end part of this post, regarding the Free-space mode, which is in the Notes section ?

                          https://community.notepad-plus-plus.org/post/81368


                          Also, did you correctly receive, by e-mail, my attached text file, regarding the TextFX features ?

                          Please, I do not want to stress you, unnecessarily ! Just go at your own pace !

                          Best Regards

                          guy038

                          A 1 Reply Last reply Nov 18, 2022, 4:02 PM Reply Quote 1
                          • A
                            Alan Kilborn @guy038
                            last edited by Nov 18, 2022, 4:02 PM

                            @guy038 said in Using sets to find A-Za-z plus the # and - chars ..?:

                            do you intend to include, in some way, the end part of this post, regarding the Free-space mode

                            He already did, see HERE .

                            A 1 Reply Last reply Nov 19, 2022, 8:58 PM Reply Quote 1
                            • A
                              Andrew McP @Alan Kilborn
                              last edited by Nov 19, 2022, 8:58 PM

                              @Alan-Kilborn I really admire you guys for figuring out Regular Expressions; I bet you never get lost in real life when you can keep track of the patterns/positions so well, aka good spatial awareness :)

                              Oh and I like the trick of having - as last character before ]

                              A 1 Reply Last reply Nov 19, 2022, 9:04 PM Reply Quote 1
                              • A
                                Alan Kilborn @Andrew McP
                                last edited by Alan Kilborn Nov 19, 2022, 9:06 PM Nov 19, 2022, 9:04 PM

                                @Andrew-McP said in Using sets to find A-Za-z plus the # and - chars ..?:

                                I really admire you guys for figuring out Regular Expressions

                                So if someone says they have “figured out regular expressions”, I pity them. Because it just means they are ripe for an upcoming whipping when a regex misunderstanding of theirs really embarrasses them. :-)

                                It pays to always be humble when discussing regular expressions with others. :-)

                                I bet you never get lost

                                GPS!

                                I like the trick of having - as last character before ]

                                Not so much a trick, as a logical place to put it when you realize that anywhere except the first or last position it must form some sort of “range”.

                                A 1 Reply Last reply Nov 19, 2022, 9:16 PM Reply Quote 1
                                • A
                                  Andrew McP @Alan Kilborn
                                  last edited by Nov 19, 2022, 9:16 PM

                                  @Alan-Kilborn hahahah yes no way would I bet my house on any regular expression I recommend covering all, no matter how perverse, eventualities…

                                  1 Reply Last reply Reply Quote 1
                                  • G
                                    guy038
                                    last edited by Nov 23, 2022, 11:35 PM

                                    Hello, @peterjones,

                                    In my previous post, I forgot to mention the ^ character, which has a special meaning within a Character class !

                                    So, here is an updated version of my previous post :

                                    If we consider the following CHARACTER CLASS structure :
                                    
                                    [.......]
                                    123456789
                                    
                                    The POSSIBLE location(s), in order to find the LITERAL character below, are :
                                    
                                    LITERAL Character [    :     POSSIBLE at any position, BETWEEN 2 to 8 
                                                                 POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                                    							 
                                    LITERAL Character ]    :     POSSIBLE at position 2 ONLY
                                                                 POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                                    							 
                                    LITERAL Character -    :     POSSIBLE at position 2
                                                                 POSSIBLE at position 8
                                                                 POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                                    
                                    LITERAL character ^    :     POSSIBLE at any position, BETWEEN 3 and 8
                                                                 POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                                    
                                    							 
                                    LITERAL Character \    :     POSSIBLE at any position, BETWEEN 2 to 8, if PRECEDED with an ANTI-SLASH character
                                    

                                    And I suppose that @alan-kilborn could add :

                                    To use a “literal ^” in a character class: Use it directly like any other character, e.g. [ab^c], but right after the opening [ of the class notation ; “escaping” is not necessary (but is permissible), e.g. [ab\^c]

                                    Best Regards,

                                    guy038

                                    1 Reply Last reply Reply Quote 2
                                    16 out of 23
                                    • First post
                                      16/23
                                      Last post
                                    The Community of users of the Notepad++ text editor.
                                    Powered by NodeBB | Contributors