Regular expressions in Notepad

Regular expressions in Notepad

I.source

How to use regular expressions in Notepad++
http://sourceforge.net/apps/mediawiki/notepad-plus/index.php%3Ftitle%3DRegular_Expressions

Source of this information is the Scintilla edit component help
http://www.scintilla.org/SciTERegEx.html

Notepad++ implements reg-exes in a subset of Posix mode only
http://sourceforge.net/apps/mediawiki/notepad-plus/index.php?title=Unsupported_Regex_Operators

operator was introduced in Scintilla v2.25 (not yet documented)
http://www.scintilla.org/ScintillaDoc.html

0000

II.regular brother plugins

Ctrl+R or in the TextFX -> TextFX Quick -> Find/Replace

III.regular

1. .

   Matches any character.

2. \x

   This allows you to use a character x that would otherwise have a special meaning. For example, \[ would be interpreted as [ and not as the start of a haracter set.

3. [...]

   This indicates a set of characters, for example, [abc] means any of the characters a, b or c. You can also use ranges, for example [a-z] for any lower case character.

4. [^...]

   The complement of the characters in the set. For example, [^A-Za-z] means any character except an alphabetic character. Multiplying operators

5. +

   This matches 1 or more instances of the previous character, as many as it can. For example, Sa+m matches Sam , Saam , Saaam and so on. [aeiou]+ matches consecutive strings of vowels.

6. *

   This matches 0 or more instances of the previous character, as many as it can. For example, Sa*m matches Sm , Sam , Saam , Saaam and so on.

7. ?

   Zero or one of the last character. Thus Sa?m matches Sm and Sam, but not Saam.左边的最后一个字符匹配0次或1次

8. *?

   Zero or more of the previous group, but as few as possible. Thus, .*o won't ever match because .* gobbles everything up to the end of line. .*?o matches everything up to and incuding the next 'o'.

9. +?

   One or more of the previous group, but as few as possible. Anchors

10. ^

    This matches the start of a line (except when used inside a set, see above).

11. $

    This matches the end of a line.

12. \<

    This matches the start of a word using Scintilla's definitions of words.

13. \>

    This matches the end of a word using Scintilla's definition of words.

14. (...)

    Parentheses mark the start of a region for tagging a match; so what's inside ( ) you can use in "replace with" using \1, \2 etc. Important: Unlike many other regular-expression engines, parentheses do not create subexpressions.

IV.Case

1. 匹配第一次出现

   “abcdefabcdef”匹配到第一次出现的字符--->"^.+?f":=abcdef

2. 去掉代码行前的数字

   ^[0-9]+?
   ^[0-9].+?
   ^[0-9] ?

3. 查找中文字符(utf8)

   [^\x00-\x7F]