Ttykuu

A binary search solution to 3Sum

Using substitution ciphers to generate new alphabets in a novel

Why can Carol Danvers change her suit colours in the first place?

What does "Scientists rise up against statistical significance" mean? (Comment in Nature)

How do I delete all blank lines in a buffer?

How to cover method return statement in Apex Class?

Using cross-validation technique for a CNN model?

Can a stoichiometric mixture of oxygen and methane exist as a liquid at standard pressure and some (low) temperature?

What is going on with 'gets(stdin)' on the site coderbyte?

Why does AES have exactly 10 rounds for a 128-bit key, 12 for 192 bits and 14 for a 256-bit key size?

How do you make your own symbol when Detexify fails?

What are the advantages of simplicial model categories over non-simplicial ones?

How much character growth crosses the line into breaking the character

Is there a RAID 0 Equivalent for RAM?

Why is it that I can sometimes guess the next note?

Is there a way to get `mathscr' with lower case letters in pdfLaTeX?

Do the primes contain an infinite almost arithmetic progression?

Make a Bowl of Alphabet Soup

Did arcade monitors have same pixel aspect ratio as TV sets?

What is the evidence for the "tyranny of the majority problem" in a direct democracy context?

putting logo on same line but after title, latex

Probability that THHT occurs in a sequence of 10 coin tosses

What should you do if you miss a job interview (deliberately)?

What is the highest possible scrabble score for placing a single tile

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

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

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

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
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What @WillyLee said.
  
  – Drew
  14 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of how do I quickly remove lines from emacs buffer
  
  – Drew
  12 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

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

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

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
  2 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What @WillyLee said.
  
  – Drew
  14 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of how do I quickly remove lines from emacs buffer
  
  – Drew
  12 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

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

  
  
  
  

add a comment | 

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

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

759212

1


2


3


4

1
2
3
4

share|improve this question

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

759212

share|improve this question

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

759212

edited 1 hour ago

Tyler

12.2k12354

edited 1 hour ago

Tyler

12.2k12354

asked 3 hours ago

AlexeiAlexei

759212

asked 3 hours ago

AlexeiAlexei

759212

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

answered 2 hours ago

manandearthmanandearth

1,1851419

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "583"
;
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
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');

var $window = $(window),
onScroll = function(e)
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
elemTop = $elem.offset().top,
elemBottom = elemTop + $elem.height();
if ((docViewTop elemBottom))
StackExchange.using('gps', function() StackExchange.gps.track('embedded_signup_form.view', location: 'question_page' ); );
$window.unbind('scroll', onScroll);

;
$window.on('scroll', onScroll);

);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2femacs.stackexchange.com%2fquestions%2f48526%2fhow-do-i-delete-all-blank-lines-in-a-buffer%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

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

answered 2 hours ago

manandearthmanandearth

1,1851419

add a comment | 

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

answered 2 hours ago

manandearthmanandearth

1,1851419

add a comment | 

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

answered 2 hours ago

manandearthmanandearth

1,1851419

share|improve this answer

answered 2 hours ago

manandearthmanandearth

1,1851419

answered 2 hours ago

manandearthmanandearth

1,1851419

answered 2 hours ago

manandearthmanandearth

1,1851419