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== 如何取代換行符號 == | == 如何取代換行符號 == | ||
支援 [[Regular expression]] | * 支援 [[Regular expression]] 的文字編輯軟體，例: [[Regular expression#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) | 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: {{kbd | key=<nowiki>SELECT REPLACE(REPLACE(REPLACE(`column`,'\r\n',''),'\n',''),'\r','') </nowiki>}} <ref>[https://stackoverflow.com/questions/13273343/replace-new-line-character-in-mysql-not-working sql - REPLACE new line character in MYSql not working - Stack Overflow] </ref> | |||
* Excel: [https://www.ablebits.com/office-addins-blog/2013/12/03/remove-carriage-returns-excel/ 3 ways to remove carriage returns in Excel: formulas, VBA macro, find&replace dialog] {{access | date = 2018-05-24}} | |||
MySQL | |||
== Related articles == | == Related articles == | ||
Revision as of 15:41, 24 May 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)
查看檔案使用的換行符號
- 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