Regex on Ricky

Emoji 正则匹配

Sun, 19 May 2024 14:37:00 +0800

Emoji 正则匹配

/\p{Emoji}/u

既然是匹配 Emoji，那么 loneProperty (\p{loneProperty}) 就应该是 Emoji ? 实际测试并不符合需求，因为在 Emoji 官方文档中， 123456789*# 也是被看作是 Emoji，如果用这个正则的话，就会把数字也认为是 Emoji，不符合只排除特殊表情的要求。

/\p{Extended_Pictographic}/u

而 Extended_Pictographic 表示的 Emoji 才是我们认为的那些表情符号。

Markdown 語法的正則表達式

Fri, 29 Oct 2021 10:19:41 +0800

# Headings
headerOne = `(#{1}\s)(.*)`
headeTwo = `(#{2}\s)(.*)`
headerThree = `(#{3}\s)(.*)`
headerFour = `(#{4}\s)(.*)`
headerFive = `(#{5}\s)(.*)`
headerSix = `(#{6}\s)(.*)`
# Bold and Italic Text
boldItalicText = `(\*|\_)+(\S+)(\*|\_)+`
# Links
linkText = `(\[.*\])(\((http)(?:s)?(\:\/\/).*\))`
# Images
imageFile = `(\!)(\[(?:.*)?\])(\(.*(\.(jpg|png|gif|tiff|bmp))(?:(\s\"|\')(\w|\W|\d)+(\"|\'))?\)`
# Unordered List
listText = `(^(\W{1})(\s)(.*)(?:$)?)+`
# Numbered Text
numberedListText = `(^(\d+\.)(\s)(.*)(?:$)?)+`
# Block Quotes
blockQuote = `((^(\>{1})(\s)(.*)(?:$)?)+`
# Inline Code
inlineCode = "(\\`{1})(.*)(\\`{1})"
# Code Block
codeBlock = "(\\`{3}\\n+)(.*)(\\n+\\`{3})"
# Horizontal Line
horizontalLine = `(\=|\-|\*){3}`
# Email Text
emailText = `(\<{1})(\S+@\S+)(\>{1})`
# TABLES
tableText = `(((\|)([a-zA-Z\d+\s#!@'"():;\\\/.\[\]\^<={$}>?(?!-))]+))+(\|))(?:\n)?((\|)(-+))+(\|)(\n)((\|)(\W+|\w+|\S+))+(\|$)`

是否有正規表示式可以檢測有效的正規表示式？

Fri, 04 Oct 2019 14:44:38 +0800

是否有正規表示式可以檢測有效的正規表示式？

這是一個遞迴正則，許多正則引擎不支援。基於 PCRE 的引擎應該支援。

/
^ # start of string
( # first group start
(?:
(?:[^?+*{}()[\]\\|]+ # literals and ^, $
| \\. # escaped characters
| \[ (?: \^?\\. | \^[^\\] | [^\\^] ) # character classes
(?: [^\]\\]+ | \\. )* \]
| \( (?:\?[:=!]|\?<[=!]|\?>)? (?1)?? \) # parenthesis, with recursive content
| \(\? (?:R|[+-]?\d+) \) # recursive matching
)
(?: (?:[?+*]|\{\d+(?:,\d*)?\}) [?+]? )? # quantifiers
| \| # alternative
)* # repeat content
) # end first group
$ # end of string
/

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