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How do I delete all blank lines in a buffer?


how do I quickly remove lines from emacs bufferHow to use flush-lines in a script?make `delete-duplicate-lines` ignore blank lines and certain wordsHow to delete word in next line with evil-mode?Make evil-mode more lisp friendly?Yanking line copies past kill-ring lines along with currentHow to add a suffix to every line of a text?Can I “insert” a backspace character into a buffer?Why I can't delete first line after save *occur* buffer to separate file?How to swap strings in all lines?Why after save *Occur* buffer I can't edit editable file?How keep only duplicate lines?













4















Emacs 26.1



In buffer



1


2


3


4


I use command "delete-blank-lines". But it NOT delete ALL BLANK LINES. It's delete ONLY ONE BLANK LINE.



Why?



I need to delete ALL BLANK LINES.
The result must be like this:



1
2
3
4





text-editing







share|improve this question



















  • 1





    Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

    – Willy Lee
    4 hours ago











  • What @WillyLee said.

    – Drew
    1 hour ago











  • Possible duplicate of how do I quickly remove lines from emacs buffer

    – Drew
    1 hour ago











  • See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

    – Drew
    1 hour ago
















4















Emacs 26.1



In buffer



1


2


3


4


I use command "delete-blank-lines". But it NOT delete ALL BLANK LINES. It's delete ONLY ONE BLANK LINE.



Why?



I need to delete ALL BLANK LINES.
The result must be like this:



1
2
3
4





text-editing







share|improve this question



















  • 1





    Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

    – Willy Lee
    4 hours ago











  • What @WillyLee said.

    – Drew
    1 hour ago











  • Possible duplicate of how do I quickly remove lines from emacs buffer

    – Drew
    1 hour ago











  • See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

    – Drew
    1 hour ago














4












4








4


1






Emacs 26.1



In buffer



1


2


3


4


I use command "delete-blank-lines". But it NOT delete ALL BLANK LINES. It's delete ONLY ONE BLANK LINE.



Why?



I need to delete ALL BLANK LINES.
The result must be like this:



1
2
3
4





text-editing







share|improve this question
















Emacs 26.1



In buffer



1


2


3


4


I use command "delete-blank-lines". But it NOT delete ALL BLANK LINES. It's delete ONLY ONE BLANK LINE.



Why?



I need to delete ALL BLANK LINES.
The result must be like this:



1
2
3
4





text-editing




text-editing






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 3 hours ago









Tyler

12.2k12354




12.2k12354










asked 5 hours ago









AlexeiAlexei

759212




759212







  • 1





    Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

    – Willy Lee
    4 hours ago











  • What @WillyLee said.

    – Drew
    1 hour ago











  • Possible duplicate of how do I quickly remove lines from emacs buffer

    – Drew
    1 hour ago











  • See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

    – Drew
    1 hour ago













  • 1





    Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

    – Willy Lee
    4 hours ago











  • What @WillyLee said.

    – Drew
    1 hour ago











  • Possible duplicate of how do I quickly remove lines from emacs buffer

    – Drew
    1 hour ago











  • See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

    – Drew
    1 hour ago








1




1





Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

– Willy Lee
4 hours ago





Are you saying you used delete-blank-lines once? If you look at the help for the function, it will tell you it deletes the surrounding blank lines, that is the blank lines around point, not all blank lines in the buffer.

– Willy Lee
4 hours ago













What @WillyLee said.

– Drew
1 hour ago





What @WillyLee said.

– Drew
1 hour ago













Possible duplicate of how do I quickly remove lines from emacs buffer

– Drew
1 hour ago





Possible duplicate of how do I quickly remove lines from emacs buffer

– Drew
1 hour ago













See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

– Drew
1 hour ago






See also: emacs.stackexchange.com/q/41636/105. The question has been asked more than once, expressed in different ways.

– Drew
1 hour ago











1 Answer
1






active

oldest

votes


















5














From MasteringEmacs.com By Mickey Petersen:




This is a frequent question so I figured I’d mention the solution here:



You want to remove all empty (blank) lines from a buffer. How do you do it? Well, it’s super easy.



Mark what you want to change (or use C-x h to mark the whole buffer) and run this:



M-x flush-lines RET ^$ RET



And you’re done. So what does that mean? Well, M-x flush-lines will flush (remove) lines that match a regular expression, and ^$ contain the meta-characters ^ for beginning of string and $ for end of string. Ergo, if the two meta-characters are next to eachother, it must be a blank line.



We can also generalize it further and remove lines that may have whitespace (only!) characters:



M-x flush-lines RET ^s-*$ RET



In this case s- is the syntax class (type C-h s to see your buffer’s syntax table) for whitespace characters. The * meta-character, in case you are not a regexp person, means zero or more of the preceding character.







share|improve this answer






















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    1 Answer
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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    5














    From MasteringEmacs.com By Mickey Petersen:




    This is a frequent question so I figured I’d mention the solution here:



    You want to remove all empty (blank) lines from a buffer. How do you do it? Well, it’s super easy.



    Mark what you want to change (or use C-x h to mark the whole buffer) and run this:



    M-x flush-lines RET ^$ RET



    And you’re done. So what does that mean? Well, M-x flush-lines will flush (remove) lines that match a regular expression, and ^$ contain the meta-characters ^ for beginning of string and $ for end of string. Ergo, if the two meta-characters are next to eachother, it must be a blank line.



    We can also generalize it further and remove lines that may have whitespace (only!) characters:



    M-x flush-lines RET ^s-*$ RET



    In this case s- is the syntax class (type C-h s to see your buffer’s syntax table) for whitespace characters. The * meta-character, in case you are not a regexp person, means zero or more of the preceding character.







    share|improve this answer



























      5














      From MasteringEmacs.com By Mickey Petersen:




      This is a frequent question so I figured I’d mention the solution here:



      You want to remove all empty (blank) lines from a buffer. How do you do it? Well, it’s super easy.



      Mark what you want to change (or use C-x h to mark the whole buffer) and run this:



      M-x flush-lines RET ^$ RET



      And you’re done. So what does that mean? Well, M-x flush-lines will flush (remove) lines that match a regular expression, and ^$ contain the meta-characters ^ for beginning of string and $ for end of string. Ergo, if the two meta-characters are next to eachother, it must be a blank line.



      We can also generalize it further and remove lines that may have whitespace (only!) characters:



      M-x flush-lines RET ^s-*$ RET



      In this case s- is the syntax class (type C-h s to see your buffer’s syntax table) for whitespace characters. The * meta-character, in case you are not a regexp person, means zero or more of the preceding character.







      share|improve this answer

























        5












        5








        5







        From MasteringEmacs.com By Mickey Petersen:




        This is a frequent question so I figured I’d mention the solution here:



        You want to remove all empty (blank) lines from a buffer. How do you do it? Well, it’s super easy.



        Mark what you want to change (or use C-x h to mark the whole buffer) and run this:



        M-x flush-lines RET ^$ RET



        And you’re done. So what does that mean? Well, M-x flush-lines will flush (remove) lines that match a regular expression, and ^$ contain the meta-characters ^ for beginning of string and $ for end of string. Ergo, if the two meta-characters are next to eachother, it must be a blank line.



        We can also generalize it further and remove lines that may have whitespace (only!) characters:



        M-x flush-lines RET ^s-*$ RET



        In this case s- is the syntax class (type C-h s to see your buffer’s syntax table) for whitespace characters. The * meta-character, in case you are not a regexp person, means zero or more of the preceding character.







        share|improve this answer













        From MasteringEmacs.com By Mickey Petersen:




        This is a frequent question so I figured I’d mention the solution here:



        You want to remove all empty (blank) lines from a buffer. How do you do it? Well, it’s super easy.



        Mark what you want to change (or use C-x h to mark the whole buffer) and run this:



        M-x flush-lines RET ^$ RET



        And you’re done. So what does that mean? Well, M-x flush-lines will flush (remove) lines that match a regular expression, and ^$ contain the meta-characters ^ for beginning of string and $ for end of string. Ergo, if the two meta-characters are next to eachother, it must be a blank line.



        We can also generalize it further and remove lines that may have whitespace (only!) characters:



        M-x flush-lines RET ^s-*$ RET



        In this case s- is the syntax class (type C-h s to see your buffer’s syntax table) for whitespace characters. The * meta-character, in case you are not a regexp person, means zero or more of the preceding character.








        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 3 hours ago









        manandearthmanandearth

        1,1851419




        1,1851419



























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