只包含中文字，不包含标点符号

Matches exactly two arrays of number literals separated by a multiplication character, where that multiplication character is either an asterisk or an x, and an array is started with a left square bracket, and whose contents are separated by commas, and which ends with a right square bracket. Unimp...

^[1-9]\d{5}(18|19|20)\d{2}((0[1-9])|(1[0-2]))((0-2)|10|20|30|31)\d{3}[0-9Xx]$

Removes BBCode tags with any characters provided after = (e.g. attributes). Omits unknown tags.

Regex שבודק אם טלפון ישראלי תקין (גם נייח וגם נייד).

save at 2018.11.25

Creates a variable of type Collection and adds listed items to it

Trim repeating characters at start and end, e.g. "//strip me$$" becomes "/strip me$"

匹配第一个非00的十六进制数(排除行号)

Check number in calculator