Remove specific character in beginning & last

^([a-z0-9]+(?:([-]+|[.])[\w-]+|[-]))@([a-z0-9]+(?:([.-]\w+)\.)[a-z]{2,13})$

This is written using several other developer's work with my tying it all together and adding a few small requirement of my own. allows Latin characters (“a” - “z” or “A” - “Z”) within the email address. permits digits (0 - 9) in the email address. enforces domain part restrictions. allows hyphens ...

matches html

mail, pass, ...

jerry_eth_match

IPv6 前缀格式

(.)\/\/(.)

How to get type from calypso XML by key words

Parses a file path into 3 capture groups: 1: path (may be empty) 2: filename (required) 3: extension (may be empty)

Case insensitive (of course) All words can all be separated by nothing, spaces, periods, slashes, dashes, or underscores. (So "PO Box 123", "P.O. Box 123", "PO-Box 123", "PO_Box123", etc. all match.) Some valid abbreviations are P/Post/Postal, O/Off/Office, and B/Box/Bx/Bin (as well as N/No/Num/Numb...

组1：编程语言 组2：代码

regex that allows digits, space and hyphen

match like this: ${foo}

using \g to match repeated pattern

Match multiline address formats

Find all short echo tags and convert to Laravel Blade echo brackets {{ }}

to find usage of magic strings in a codebase

Der Ausdruck findet alle CH (Schweizer) IBAN (International Bank Account Number) in einem beliebigen Text.