Emeditor Regular Expression

本文主要是介绍Emeditor Regular Expression，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

要注意的是，查找所有，要加上 "." 后面+上“*”
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Q. What are examples of regular expressions?

• strings surrounded by double-quotation marks
  ".*?"
• strings surrounded by [ ]
  /[[^/[]*?/]
• variable names
  [a-zA-Z_][a-zA-Z_0-9]*
• IP addresses
  ([0-9]{1,3})/.([0-9]{1,3})/.([0-9]{1,3})/.([0-9]{1,3})
• URL
  (/S+)://([^:/]+)(:(/d+))?(/[^#/s]*)(#(/S+))?
• lines followed by a tab
  /t.*$
• Hiragana
  [/x{3041}-/x{309e}]
• Full-width Katakana
  [/x{309b}-/x{309c}/x{30a1}-/x{30fe}]
• Half-width Kana
  [/x{ff61}-/x{ff9f}]
• CJK ideographs
  [/x{3400}-/x{9fff}/x{f900}-/x{fa2d}]
• CJK ideograph marks
  [/x{3000}-/x{3037}]
• Hangul
  [/x{1100}-/x{11f9}/x{3131}-/x{318e}/x{ac00}-/x{d7a3}]
• Insert // at start of lines
  Find: ^
  Replace with: //
• Remove // at end of lines
  Find: ^//
  Replace:
• Remove trailing whitespaces
  Find: /s+?$
  Replace with:
• Replace (abc) with [abc]
  Find: /((.*?)/)
  Replace: /[/1/]
• Replace <H3 ...> with <H4 ...>
  Find: <H3(.*?)>
  Replace: <H4/1>
• Replace 9/13/2003 with 2003.9.13
  Find: ([0-9]{1,2})/([0-9]{1,2})/([0-9]{2,4})
  Replace: /3/./1/./2/.
• Uppercase characters from a to z (EmEditor Professional only)
  Find: [a-z]
  Replace: /U/0
• Capitalize all words (EmEditor Professional only)
  Find: ([a-zA-Z])([a-zA-Z]*)
  Replace: /U/1/L/2

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Regular Expression Syntax

EmEditor regular expression syntax is based on the Perl regular expression syntax.

Literals

All characters are literals except: ".", "*", "?", "+", "(", ")", "{", "}", "[", "]", "^", "$" and "/". These characters are literals when preceded by a "/". A literal is a character that matches itself. For example, searching for "/?" will match every "?"in the document, or searching for "Hello" will match every "Hello" in the document.

Metacharacters

The following tables contain the complete list of metacharacters (non-literals) and their behavior in the context of regular expressions.

/	Marks the next character as a special character, a literal, or a back reference. For example, 'n' matches the character "n". '/n' matches a newline character. The sequence '//' matches "/" and "/(" matches "(".
^	Matches the position at the beginning of the input string. For example, "^e" matches any "e" that begins a string.

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