newline

问题 There are too much confusion about \n and \r. There are lot's of questions in stack about differences between \n and \r. In a nut shell My confusions/questions are: Is \r\n equal to \n\r? Is \r\n cause to two new lines? Is \r cause a new line in output? How can I replace all new lines with <BR> tag in PHP? Not all strings has \r or \n explicitly . Suppose I have a textarea and user inputs some characters including Enter of keyboard. No \r or \n is entered but new lines exist. How to remove

问题 Is there exist the opposite to the newline '\n' character in Java which will move back to the previous line in the console? 回答1: ASCII doesn't standardize a "line starve" or reverse line feed control character. Some character based terminals/terminal emulators recognize control code sequences that move the cursor up a line; these aren't Java-specific, and depend on your OS and configuration. Here's a starting point if you're using Linux: http://www.kernel.org/doc/man-pages/online/pages/man4

问题 I have a script that copies table cells from the browser into the user's clipboard. I loop through each cell and when a new line is needed I use text += "\n"; If I paste the text into excel, it formats correctly and fills in the proper rows, however if I paste into notepad, it shows a symbol instead of creating a new line: 123□456□789 instead of: 123 456 789 Is there something else I can use that notepad will recognize as a line break? 回答1: that's because you need a carriage return and line

问题 The escape character \n and Unicode character \u000a will only work in JavaScript. However, I'm trying to add a line break in XML view as below. But doesn't work: <u:TimelineItem text="First Line\n SecondLine" /> 回答1: New lines in text controls can be added with the following characters: In XML views or XML fragments: Line feed : or . In combination with carriage return : or . In JS or i18n*.properties files: Line feed : \n or \u000a . In combination with carriage return : \r\n or

问题 How can I replace some of the NewLine characters inside a large text (*.csv) file (~ 2 GB) ? I cannot read the whole file with File.ReadAllText because a get a OutOfMemory Error and I cannot use the StreamReader because it strips away all the NewLine characters. Here's some sample text: Row1Field1;Row1Field2;Row1Field3(NewLine) Row2Field1;Row2Fie(NewLine) *<--- This newline is by mistake and I want to replace it!* ld2;Row2Field3(NewLine) Row3Field1;Row3Field2;Row3Field3(NewLine) 回答1: You

问题 I want to create a text file with mulitple lines using system calls in C and populate it with the text provided as command line arguments. This is what I wrote: #include <stdio.h> #include <fcntl.h> #include <string.h> #include <stdlib.h> #include <unistd.h> #define MAX_SZ 1024 int main(int argc, char *argv[]) { if (argc != 3) { printf("Invalid Number of arguments\n"); printf("USAGE: ./a.out file_name \"msg\"\n"); } else { int fd_creat, fd_open, fd_write; char file_name[MAX_SZ]; char *msg =

问题 This should be so simple, it's silly. But I can't get it to work. I have a header which I define while reading a file: if "[gene=env]" in line or "[gene=HIV2gp7]" in line: header = line now this header looks something like ">lcl|NC_001802.1_prot_NP_057856.1_8 [gene=env]" I need to attach a number to it like so: ">lcl|NC_001802.1_prot_NP_057856.1_8 [gene=env]1" I have 100 identical headers, which have to be numbered 1 through 100 But whatever I try, I can't get the number on the same line. The

问题 I have a large (9 GiB), ASCII encoded, pipe delimited file with UNIX-style line endings; 0x0A. I want to sample the first 100 records into a file for investigation. The following will produce 100 records (1 header record and 99 data records). However, it changes the line endings to DOS/Winodws style; CRLF, 0x0D0A. Get-Content -Path .\wellmed_hce_elig_20191223.txt | Select-Object -first 100 | Out-File -FilePath .\elig.txt -Encoding ascii I know about iconv, recode, and dos2unix. Those programs

问题 I have a large (9 GiB), ASCII encoded, pipe delimited file with UNIX-style line endings; 0x0A. I want to sample the first 100 records into a file for investigation. The following will produce 100 records (1 header record and 99 data records). However, it changes the line endings to DOS/Winodws style; CRLF, 0x0D0A. Get-Content -Path .\wellmed_hce_elig_20191223.txt | Select-Object -first 100 | Out-File -FilePath .\elig.txt -Encoding ascii I know about iconv, recode, and dos2unix. Those programs

问题 I'm reading streams in PHP, using proc_open and fgets($stdout), trying to get every line as it comes in. Many linux programs (package managers, wget, rsync) just use a CR (carriage return) character for lines which periodically updates "in place", like download progress. I'd like to catch these updates (as separate lines) as soon as they happen. At the moment, fgets($stdout) just keeps reading until a LF, so when progress is going very slowly (big file for example) it just keeps on reading