username

((<url>)\n(<loc>))|((<\/loc>)\n.*\n.*\n.*\n(<\/url>))

import re
if re.match(r"hello[0-9]+", 'hello1'):
    print('Yes')

import re 
s = "string. With. Punctuation?" 
s = re.sub(r'[^\w\s]','',s) 

import re

print(re.search(r"[Pp]ython", "Python"))
print(re.search(r"[a-z]way", "The end of the highway"))
print(re.search(r"cloud[a-zA-Z0-9]", "cloudy"))

# put ^ before a character class to search for anything but the given character class
print(re.search(r"[^a-zA-Z]", "This is a sentence with spaces."))

# | as OR operator
print(re.search(r"cat|dog", "I like dogs."))
print(re.findall(r"cat|dog", "I like both cats and dogs."))

preg_match('/(.)\\1{4,}/', $text)

(wordone)|(wordtwo)

(\w+)
to
"$1",
  
ASD
ZXC
  
to
  
"ASD",
"ZXC",

<label
					aria-label="password"
					class="form-label"
					for="password"
				>Password</label>
				<p><small>6 - 12 characters, one number, one symbol, one uppercase and
						one lowercase letter.</small></p>
				<input
					class="form-control"
					title="Must be 6 - 12 characters and contain at least one number, one symbol, one uppercase and one lowercase letter."
					type="password"
					id="password"
					name="password"
					required
					pattern="^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#$%^&*_=+-]).{6,12}$"
				/>

https://vimsky.com/zh-tw/examples/detail/python-method-regex.sub.html

# Match text between two strings with regular expression
clean_text = re.search(r'before(.*?)after', text).group(1)
import re
s = 'Part 1. Part 2. Part 3 then more text'
re.search(r'Part 1\.(.*?)Part 3', s).group(1)
' Part 2. '
re.search(r'Part 1(.*?)Part 3', s).group(1)
'. Part 2. '

// SOLUTION 1 - MY (DISCOVERED) SOLUTION (RUNTIME - 104MS, 44.9 MB)
var isAnagram = function(s, t) {
    
    // set function to split, sort, and rejoin characters in a string
    const sortString = (str) => {
        return str.split("").sort().join("");
    }
    
    // regex removes any non-alphabet characters in the string and makes it lowercase
    s = s.replace(/[^\w]/g, '').toLowerCase()
    t = t.replace(/[^\w]/g, '').toLowerCase()

    // final comparison
    return sortString(s) === sortString(t)
  
  // ATTEMPT 1
  //     let anagram = []
    
  // return false is lengths don't match
  //     if (s.length !== t.length) return false;
  //     else {
  //         for (let i = 0; i < s.length; i++) {
  //             let arrT = t.split("")
  //             let newArrT;
  //             if (arrT.includes(s.charAt(i))) {
  //                 let index = arrT.indexOf(s.charAt(i));
  //                 console.log("s char: ", s.charAt(i));
  //                 console.log("index: ", index);

  //                 anagram.push(s.charAt(i))

  //                 console.log("splice: ", arrT.splice(index, 1))
  //                 arrT.splice(index, 0)

  //                 newArrT = arrT
  //                 console.log("newArr: ", newArrT)
  //             };
  //         };
  //     }
  //     console.log(anagram)
  //     return anagram.join("") === s;
}

// SOLTUION 2 - (BEST RUNTIME - 60MS)
var isAnagram = function(s, t) {
    const key = w => Object.entries([...w].reduce((a, c) => {
        if (!(c in a)) a[c] = 0;
        a[c] += 1;
      
        return a;
    }, {})).sort(([c1], [c2]) => c1.localeCompare(c2)).flat().join('');
  
    return key(s) === key(t);
};

// SOLUTION 3 - (RUNTIME - 72MS)
var isAnagram = function(s, t) {
    if(s.length !== t.length) return false;
  
    let map = {};
  
    for(let item of s) {
        map[item] = map[item] + 1 || 1;
    }
    
    for(let item of t) {
        if(!map[item]) return false;
        else map[item]--;
    }
  
    return true;
};

const validateEmail = email => {
    const regex = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
    return regex.test(String(email).toLowerCase());
  }

^(\+\d{1,2}\s)?\(?\d{3}\)?[\s.-]?\d{3}[\s.-]?\d{4}$

wp search-replace '<script async\s*.*>\s*.*<\/script>' '' wp_posts --regex --allow-root

/* No-index posts older than 90 days if in PR custom post type */

function noindexOldPRs() {
	$url = 'http://' . $_SERVER[ 'HTTP_HOST' ] . $_SERVER[ 'REQUEST_URI' ];
	$current_post_id = url_to_postid( $url );
	
	$publishdate = get_the_time('Y-m-d', $current_post_id);
	$posttype = get_post_type ($current_post_id);
	
	if ($posttype == "pr") {
		$ninetydaysago = date("Y-m-d", strtotime("-90 days"));
		if($publishdate < $ninetydaysago) {
			echo '<meta name="robots" content="noindex">';
		}
	} elseif (has_tag('nonnews', $current_post_id)) {
		echo '<meta name="Googlebot-News" content="noindex, nofollow">';
	}
	
	//add noindex/nofollow for google news bot
	// get tags
	// if a tag includes nonnews
	// then add
	// <meta name="Googlebot-News" content="noindex, nofollow">

}
add_action('wp_head', 'noindexOldPRs');

(?<=\.)\w{1,4}$