return an int

Accept regex in the form OutputType ServiceName ( InputType1 , InputType2 , . . . )

This pattern needs to validate serial number

123

零宽断言比较复杂。保存了一些示例待不时之需 ()表示捕获分组，()会把每个分组里的匹配的值保存起来，从左向右，以分组的左括号为标志，第一个出现的分组的组号为1，第二个为2，以此类推 (?:)表示非捕获分组，和捕获分组唯一的区别在于，非捕获分组匹配的值不会保存起来 正则表达式的先行断言和后行断言一共有 4 种形式：...

Phone number

Matches absolute file paths, such as C:\Users\username\Documents\filename.txt The path must contain a file and extension at the end

Find coordinates

Extract translations from F* XMLs

simple sabre line parser

4 enteros / coma o punto / 3 decimales

ip:port check

冲鸭！

Remove all words that don't end in "ness" from a dictionary.

This REGEX, allow extract all words in brackets [].

Trying to adapt this regex to support LVM.

This validate all most all email addresses.

Select php block code , start to end.

Select a Phone Number with +98 or 0

Bangladeshi Phone Number Regex