Remove All Newlines from Inside a String

How to remove all line breaks from a string

Line breaks (better: newlines) can be one of Carriage Return (CR, \r, on older Macs), Line Feed (LF, \n, on Unices incl. Linux) or CR followed by LF (\r\n, on WinDOS). (Contrary to another answer, this has nothing to do with character encoding.)

Therefore, the most efficient RegExp literal to match all variants is

/\r?\n|\r/

If you want to match all newlines in a string, use a global match,

/\r?\n|\r/g

respectively. Then proceed with the replace method as suggested in several other answers. (Probably you do not want to remove the newlines, but replace them with other whitespace, for example the space character, so that words remain intact.)

Remove all line breaks from a long string of text

How do you enter line breaks with raw_input? But, once you have a string with some characters in it you want to get rid of, just replace them.

>>> mystr = raw_input('please enter string: ')
please enter string: hello world, how do i enter line breaks?
>>> # pressing enter didn't work...
...
>>> mystr
'hello world, how do i enter line breaks?'
>>> mystr.replace(' ', '')
'helloworld,howdoienterlinebreaks?'
>>>

In the example above, I replaced all spaces. The string '\n' represents newlines. And \r represents carriage returns (if you're on windows, you might be getting these and a second replace will handle them for you!).

basically:

# you probably want to use a space ' ' to replace `\n`
mystring = mystring.replace('\n', ' ').replace('\r', '')

Note also, that it is a bad idea to call your variable string, as this shadows the module string. Another name I'd avoid but would love to use sometimes: file. For the same reason.

Remove all newlines from inside a string

strip only removes characters from the beginning and end of a string. You want to use replace:

str2 = str.replace("\n", "")
re.sub('\s{2,}', ' ', str) # To remove more than one space 

How to remove line breaks from a file in Java?

You need to set text to the results of text.replace():

String text = readFileAsString("textfile.txt");
text = text.replace("\n", "").replace("\r", "");

This is necessary because Strings are immutable -- calling replace doesn't change the original String, it returns a new one that's been changed. If you don't assign the result to text, then that new String is lost and garbage collected.

As for getting the newline String for any environment -- that is available by calling System.getProperty("line.separator").

remove all line breaks (enter symbols) from the string using R

You need to strip \r and \n to remove carriage returns and new lines.

x <- "foo\nbar\rbaz\r\nquux"
gsub("[\r\n]", "", x)
## [1] "foobarbazquux"

Or

library(stringr)
str_replace_all(x, "[\r\n]" , "")
## [1] "foobarbazquux"

Remove new line in javascript code in string

If you do not know in advance whether the "new line" is \r or \n (in any combination), easiest is to remove both of them:

str = str.replace(/[\n\r]/g, '');

It does what you ask; you end up with newline. If you want to replace the new line characters with a single space, use

str = str.replace(/[\n\r]+/g, ' ');

How can I remove a newline from inside a string in C++?

My efforts remove only the new line, but not the carriage return

The newline and carriage control are considered control characters.

To remove all the control characters from the string, you can use std::remove_if along with std::iscntrl:

#include <cctype>
#include <algorithm>
//...
lookContents.erase(std::remove_if(lookContents.begin(), lookContents.end(), 
                  [&](char ch) 
                  { return std::iscntrl(static_cast<unsigned char>(ch));}), 
                  lookContents.end());

Once you have all the control characters removed, then you can process the string without having to check for them.

Is there a way to remove a newline character within a string in an array?

You could for example split, remove all the empty entries, and then trim each item to also remove all the leading and trailing whitespace characters including the newlines.

Note that you don't have to escape the space and the hyphen.

const input = `- foo
- bar`;
const chunks = input.split(/ ?- ?/)
  .filter(Boolean)
  .map(s => s.trim());

console.log(chunks);

How to remove newlines from beginning and end of a string?

Use String.trim() method to get rid of whitespaces (spaces, new lines etc.) from the beginning and end of the string.

String trimmedString = myString.trim();

Removing trailing newline character from fgets() input

The elegant way:

Name[strcspn(Name, "\n")] = 0;

The slightly ugly way:

char *pos;
if ((pos=strchr(Name, '\n')) != NULL)
    *pos = '\0';
else
    /* input too long for buffer, flag error */

The slightly strange way:

strtok(Name, "\n");

Note that the strtok function doesn't work as expected if the user enters an empty string (i.e. presses only Enter). It leaves the \n character intact.

There are others as well, of course.

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