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Emoji Regular expression

Emoji Regular expression /\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。

Sunday, May 19, 2024 Read
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Regex for Markdown Syntax

Regex for Markdown Syntax basic-syntax # 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#!@'"():;\\\/.\[\]\^<={$}>?(?!-))]+))+(\|))(?:\n)?((\|)(-+))+(\|)(\n)((\|)(\W+|\w+|\S+))+(\|$)`

Friday, October 29, 2021 Read
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Is there a regular expression to detect a valid regular expression?

Is there a regular expression to detect a valid regular expression? This is a recursive regex, and is not supported by many regex engines. PCRE based ones should support it. / ^ # 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 / Without whitespace and comments

Friday, October 4, 2019 Read