I am trying to find and remove any blank or whitespaced lines in OpenOffice document using regex.
Currently I can do it in two steps:
Search for ^$ and replace with nothing.
This will remove any empty lines.
Search for ^\s*$ and replace with nothing.
This will remove any lines which contains only spaces or tabs.
Important note: From my point of view, this 2nd version should also remove any empty lines (as 1st version), but actually it doesn't.
So, there are actually two questions.
For what reason second regex matches only lines with spaces and tabs, but don't match empty lines?
Is there way to combine first and second version to achieve desired result in one step? Here what I tried: ^$|^\s*$ and (^|^\s*)$. But it doesn't work. It matches only whitespaced lines, but not empty ones.
Text for test:
Just for example, I changed spaces to dots
and tabs to dashes.
aa
..........................
-------------------
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaa
Desired result:
aa
aaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaa
AltSearch can do this as a single step using a Batch script. In the AltSearch dialog, click on Batch >>. Then Edit the file and paste the following code at the end.
[Name] Remove any blank or whitespaced lines
; Remove any lines which contains only spaces or tabs.
[Find]^\s*$
[Replace]
[Parameters] MsgOff Regular
[Command] ReplaceAll
; Remove any empty lines.
[Find]^$
[Replace]
[Parameters] MsgOff Regular
[Command] ReplaceAll
[End]
Now, save the text file and click Refresh. Finally, click on Remove any blank or whitespaced lines and press Execute.
This produces the desired result and shows a single dialog:
Batch 'Remove any blank or whitespaced lines' is ended.
10 replacements have been done.
Since the title of your question reads like asking for a pure regex (which is why I found it):
\s(?=\s)
Simply replace its matches with nothing - see Regex101 and Regexr.
I would like to find all lines that follow this format:
type="file_one_id"
type="file_two_id"
type="file_three_id"
And replace them with a single replacement line:
type="my_generic_replacement"
The problem is that there are many other lines which also start with type="file_ or end with _id" , so I'm thinking that searching for lines that both begin with type="file_ and end with _id" will be required. Is there a way to do this with notepad++?
You could search for ^type="file_.*_id"$ (using Regular Expressions) and replace with type="my_generic_replacement"
To replace the lines in Notepad++ you can use this regex:
type="file_\w+_id"
To open the window click Search => Replace
You can find and replace \r\n and tick Extended in the Replace box; \r\n matches carriage-return + line-feed.
Some systems may only have \r or only \n at the line breaks
In Atom, If I activate regex mode on the search-and-replace tool, it can find newlines as \n, but when I try to replace them, they're still there.
Is there no way to replace a newline-spanning string in Atom?
Looks like Atom matches newlines as \r\n but behaves inconsistently when replacing just the \n with nothing.
So newlines seem to match \s+ and \r\n, and only "half" of the line-ending matches \n.
If you replace \n with a string, nothing happens to the line-ending, but the string is appended to the next line
If you replace \r with a string, nothing happens at all, but the cursor advances.
It's alittle bit late to answer but i use following term to search and it works with Atom v1.19.7 x64
\r?\n|\r
BR
None of these answers helped me.
What worked for me:
I just added a new line at the end of the file.
Shift + <- (arrow to left)
Ctrl + C
Ctrl + V in the "Replace in current buffer" line
Just copied the new line and pasted it in :D
DELETE INVISIBLE LINE BREAKS IN CODE WITH ATOM
(using the "Find in buffer" function)
(- open your code-file with the Atom-Editor)
Hit cmd(mac)/ctrl(win) + f on your keyboard for activating the Find in buffer function (a little window appears at the bottom atom-screen edge).
Mark your Code in which you want to delete the invisible Line breaks.
Click on the Markup-Mode Button and after that on the Regex-Mode (.*) Button and type into the first field: \n
After that click replace all.
[And Atom will delete all the invisible line breaks indicated by \n (if you use LF-Mode right bottom corner, for CRLF-Mode (very common on windows machines as default) use \r\n) by replacing them with nothing.]
Hope that helps.
Synaikido
You can use backreferencing:
eg. Replace triple blank lines with a single blank line
Find regex: (\r\n){3}
Replace: $1
You can indicate double blank lines with (\r\n){2} ... or any number n of blank lines with (\r\n){n}. And you can omit the $1 and leave replace blank to remove the blank lines altogether.
If you wanted to replace 3 blank lines with two, your replace string can be $1$1 or $1$2 (or even $1$3 ... $3$3 ... $3$2 ... ): $1 just refers to the first round bracketed expression \r\n; $2 with the second (which is the same as the first, so $1$1 replaces the same way as $1$2 because $1 == $2). This generalizes to n blank lines.
The purists will probably not like my solution, but you can also transform the find and replace inputs into a multiline text box by copying content with several line breaks and pasting it into the find/replace inputs. It will work with or without using regex.
For example, you can copy this 3 lines and paste them into both find and replace inputs:
line 1
line 2
line 3
Now that your inputs have the number of lines that you need, you can modify them as you want (and add regex if necessary).
Heh, very weird, Ctrl+Shift+F does not work too!
Workaround: open Atom Settings, then Core Packages->line-ending-selector, scroll to bottom to see tips about command to convert line endings: 'convert-to-LF'.
To convert: Cmd+Shift+P type 'line' and choose 'convert-to-LF' - done!
You could change default option 'Default line ending' from 'OS' to 'LF'.
Also after settings changed your new files will use 'LF'.
prerequisite: activate 'Use Regexp'
in my version of atom (linux, 1.51.0) i used the following code to add 'export ' after a new line
search '\n'
replace '\nexport '
worked like a charm
\r\n didn't match anything
I would like a Replace expression that matches all lines containing .function_call and replace those lines with empty lines
However if that line has = in it, do nothing.
For example
int i = .function_call should be left without adjustment.
I have no experience with regex.
In visual studio -> Edit -> Find and Replace -> Replace in files
Find what: ^[^=]*\.function_call.*$
Leave the Replace with box empty, and make sure you have the Use box checked and Regular Expressions selected.
You may try to use this as the pattern:
^[\s\S-[=]]*\.function_call.*$
And replace it with \n.
How can I replace empty lines in Notepad++? I tried a find and replace with the empty lines in the find, and nothing in the replace, but it did not work; it probably needs regex.
There is now a built-in way to do this as of version 6.5.2
Edit -> Line Operations -> Remove Empty Lines or Remove Empty Lines (Containing Blank characters)
You need something like a regular expression.
You have to be in Extended mode
If you want all the lines to end up on a single line use \r\n. If you want to simply remove empty lines, use \n\r as #Link originally suggested.
Replace either expression with nothing.
There is a plugin that adds a menu entitled TextFX. This menu, which houses a dizzying array of quick text editing options, gives a person the ability to make quick coding changes. In this menu, you can find selections such as Drop Quotes, Delete Blank Lines as well as Unwrap and Rewrap Text
Do the following:
TextFX > TextFX Edit > Delete Blank Lines
TextFX > TextFX Edit > Delete Surplus Blank Lines
notepad++
Ctrl-H
Select Regular Expression
Enter ^[ \t]*$\r?\n into find what, leave replace empty. This will match all lines starting with white space and ending with carriage return (in this case a windows crlf)
Click the Find Next button to see for yourself how it matches only empty lines.
Press ctrl + h (Shortcut for replace).
In the Find what zone, type ^\R ( for exact empty lines) or ^\h*\R ( for empty lines with blanks, only).
Leave the Replace with zone empty.
Check the Wrap around option.
Select the Regular expression search mode.
Click on the Replace All button.
You can follow the technique as shown in the following screenshot:
Find what: ^\r\n
Replace with: keep this empty
Search Mode: Regular expression
Wrap around: selected
NOTE: for *nix files just find by \n
This worked for me:
Press ctrl + h (Shortcut for replace)
Write one of the following regex in find what box.
[\n\r]+$ or ^[\n\r]+
Leave Replace with box blank
In Search Mode, select Regex
Click on Replace All
Done!
In notepad++ press CTRL+H , in search mode click on the "Extended (\n, \r, \t ...)" radio button then type in the "Find what" box: \r\n (short for CR LF) and leave the "Replace with" box empty..
Finally hit replace all
Well I'm not sure about the regex or your situation..
How about CTRL+A, Select the TextFX menu -> TextFX Edit -> Delete Blank Lines and viola all blank line gone.
A side note - if the line is blank i.e. does not contain spaces, this will work
1) Ctrl + H ( Or Search 🠆 Replace..) to open Replace window.
2) Select 'Search Mode' 'Regular expression'
3) In 'Find What' type ^(\s*)(.*)(\s*)$ & in 'Replace With' type \2
^ - Matches start of line character
(\s*) - Matches empty space characters
(.*) - Matches any characters
(\s*) - Matches empty spaces characters
$ - Matches end of line character
\2 - Denotes the matching contend of the 2nd bracket
Refer https://www.rexegg.com/regex-quickstart.html for more on regex.
You can search for the following regex: ^(?:[\t ]*(?:\r?\n|\r))+ and replace it with empty field
Ctrl+H.
find - \r\r
replace with - \r.
This obviously does not work if the blank lines contain tabs or blanks. Many web pages (e.g. http://www.guardian.co.uk/) contain these white lines, as a result of a faulty HTML editor.
Remove white space using regular expression as follows:
change pattern: [\t ]+$
into nothing.
where [\t ] matches either tab or space. '+' matches one or more occurrences, and '$' marks the end of line.
Then use notepad++/textFX to remove single or extra empty lines.
Be sure that these blank lines are not significant in the given context.
Edit >> Blank Operations >> Trim Leading and Trailing Spaces (to remove black tabs and spaces in empty lines)
Ctrl + H to get replace window and replace pattern: ^\r\n with nothing (select regular expression)
Note: step 1 will remove your code intendation done via tabs and blank spaces
Sometimes \n\r etc not work, here to figure it out, what your actually regular expression should be.
Advantage of this trick: If you want to replace in multiple file at once, you must need this method. Above will not work...
CTRL+A, Select the TextFX menu -> TextFX Edit -> Delete Blank Lines as suggested above works.
But if lines contains some space, then move the cursor to that line and do a CTRL + H. The "Find what:" sec will show the blank space and in the "Replace with" section, leave it blank.
Now all the spaces are removed and now try CTRL+A, Select the TextFX menu -> TextFX Edit -> Delete Blank Lines
/n/r assumes a specific type of line break. To target any blank line you could also use:
^$
This says - any line that begins and then ends with nothing between. This is more of a catch-all. Replace with the same empty string.
I did not see the combined one as answer, so search for ^\s+$ and replace by {nothing}
^\s+$ means
^ start of line
\s+ Matches minimum one whitespace character (spaces, tabs, line breaks)
$ until end of line
This pattern is tested in Notepad++ v8.1.1
It replaces all spaces/tabs/blank lines before and after each row of text.
It shouldn't mess with anything in the middle of the text.
Find: ^(\s|\t)+|(\s|\t)+$
Replace: leave this blank
Before:
_____________________________________
\tWORD\r\n
\r\n
\tWORD\s\tWORD\s\t\r\n
\r\n
\r\n
WORD\s\s\tWORD\t\sWORD\s\r\n
\t\r\n
\s\s\s\r\n
WORD\s\sWORD\s\s\t\r\n
____________________________________
After:
_____________________________________
WORD\r\n
WORD\s\tWORD\r\n
WORD\s\s\tWORD\t\sWORD\r\n
WORD\s\sWORD
_____________________________________
A few of the above expressions and extended expressions did not work for me, but the regular expression "$\n$" did.
An easy alternative for removing white space from empty lines:
TextFX>TextFX Edit> Trim Trailing Spaces
This will remove all trailing spaces, including trailing spaces in blank lines.
Make sure, no trailing spaces are significant.
this work for me:
SEARCH:^\r
REPLACE: (empty)