Return symbol: Difference between revisions
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查看檔案使用的換行符號 | 查看檔案使用的換行符號 | ||
* [https://github.com/atom/line-ending-selector atom/line-ending-selector: Switch between Unix and Window style line endings.] for [https://atom.io/ Atom] on {{Win}}, {{Mac}} & {{Linux}} | |||
* [https://en.wikipedia.org/wiki/File_(command) file (command)]: {{kbd | key=<nowiki>file filename.txt</nowiki>}} on {{Linux}}, {{Mac}}<ref>[https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man1/file.1.html file(1) Mac OS X Manual Page]</ref> & Cygwin on {{Win}} | * [https://en.wikipedia.org/wiki/File_(command) file (command)]: {{kbd | key=<nowiki>file filename.txt</nowiki>}} on {{Linux}}, {{Mac}}<ref>[https://developer.apple.com/legacy/library/documentation/Darwin/Reference/ManPages/man1/file.1.html file(1) Mac OS X Manual Page]</ref> & Cygwin on {{Win}} | ||
<table border="1" class="wikitable" > | <table border="1" class="wikitable" > | ||
Revision as of 19:37, 25 August 2018
換行符號 (Return symbol, line terminators, line endings, newline, end of line (EOL), line feed or line break)
- On Win
: CRLF = \r\n - On Unix, Linux
& recent versions of macOS
: LF = \n - On classic versions of macOS
[1][2] e.g. Mac OS 9: CR = \r
如何看到換行符號
查看每一行使用的換行符號
- Notepad++ On Win
選單 → 檢視 → 特殊字元 → 顯示行尾字元 (EOL) - RawLineEdit for Sublime text
- 換行符號是 CRLF = \r\n 顯示的是 <0x0d>¬
- 換行符號是 LF = \n 顯示的是 ¬ 象形符號 (glyph)
- 換行符號是 CR = \r 顯示的是 <0x0d>
- BASH cat command e.g. cat -e <filename>
- 換行符號是 CRLF = \r\n 顯示的是 ^M$
- 換行符號是 LF = \n 顯示的是 $
- 換行符號是 CR = \r 顯示的是 ^M
查看檔案使用的換行符號
- atom/line-ending-selector: Switch between Unix and Window style line endings. for Atom on Win
, macOS
& Linux
- file (command): file filename.txt on Linux
, macOS
[3] & Cygwin on Win
| 檔案內容 | File command 偵測結果 |
|---|---|
| 換行符號是 CRLF = \r\n | UTF-8 Unicode text, with CRLF line terminators |
| 換行符號是 LF = \n | UTF-8 Unicode text |
| 換行符號是 CR = \r | UTF-8 Unicode text, with CR line terminators |
| 特例: 換行符號夾雜 \r\n 和 \r | UTF-8 Unicode text, with CRLF, CR line terminators |
| 特例: 換行符號夾雜 \r\n 和 \n | UTF-8 Unicode text, with CRLF, LF line terminators |
| 特例: 換行符號夾雜 \n 和 \r | UTF-8 Unicode text, with CR, LF line terminators |
| 特例: 無內容的空檔案 | empty |
如何取代換行符號
- 支援 Regular expression 的文字編輯軟體,例: 將Email清單,轉成Email軟體可以使用的寄信名單 (取代換行符號為逗號)
- MySQL: SELECT REPLACE(REPLACE(REPLACE(`column`,'\r\n',''),'\n',''),'\r','') [4]
- Excel: 3 ways to remove carriage returns in Excel: formulas, VBA macro, find&replace dialog [Last visited: 2018-05-24]
Related articles
- Carriage return - Wikipedia
- 換行 - 维基百科,自由的百科全书
- 回車鍵 - 維基百科,自由的百科全書
- 陳雲濤的部落格: 筆記 CRLF跟LF之區別 --- 隱形的 bug:「CRLF才是真正的打字機運作方式,你可以想像:打字機打到最右邊,要先return到最左邊之後,再往下一行,所以是CRLF ... ...」
- Differences in end of line characters Mac, Windows, and Linux
References