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1. Top results related to at least 1 uppercase letter

   • Password generation function with at least 1 number, 1 uppercase letter and 1 lowercase letter

     Top Answer

     Answered Dec 22, 2020 · 0 votes

     You can remove the uppercase characters and numbers from PASSWORD_CHARS_RANGE, then add this code segment to convert lowercase characters to uppercase and numbers:

     // change random number of characters (1 to length-2) to uppercase var uc = Math.ceil(Math.random()*(passwordLength-2)); for (var j = 0; j < uc; j++) { var idx1 = Math.floor(Math.random()*(passwordLength-1)); password = password.substr(0,idx1)+password.charAt(idx1).toUpperCase()+password.substr(idx1+1); } // change random number of characters (1 to length-uc-1) to numbers var un = Math.ceil(Math.random()*(passwordLength-uc-1)); for (var k = 0; k < un; k++) { var idx2 = Math.floor(Math.random()*(passwordLength-1)); if (password.charAt(idx2) === password.charAt(idx2).toLowerCase()) { password = password.substr(0,idx2)+String(Math.floor(Math.random()*10))+password.substr(idx2+1); } else --k; }

     Running the function on a sample sheet gives:

     Check all answers on Stack Overflow

     1/5

   • Regex - At least 1 number, 1 letter, 1 special character and at least 3 characters

     Top Answer

     Answered May 23, 2016 · 5 votes

     The problem is that your {3} quantifier applies to your last look-ahead, which is nonsensical : it means that at the start of the text, you must match 3 times the look-ahead, which is a given if it matches once since lookaround are 0-width matches.

     You could use the following :

     ^(?=.*\d)(?=.*[a-zA-Z])(?=.*[\W_]).{3,}$-

     which specifies, aside from your existing look-aheads, that at least 3 characters must be matched.

     If you just test the string, it would also be enough to match

     ^(?=.*\d)(?=.*[a-zA-Z])(?=.*[\W_]).{3}-

     without an end anchor : you match 3 characters, and stop matching what follows since your requisites are met.

     Check all answers on Stack Overflow

     2/5

   • Regex contains at least one uppercase letter AND NOT contains at least one underscore

     Top Answer

     Answered May 12, 2020 · 1 votes

     Use

     ^(?=.*[A-Z])(?!.*_).+-

     See proof.

     Match a string that contains an uppercase character - (?=.*[A-Z]), does not contain underscore - (?!.*_), and is not empty - .+. Remove .+ or use .* to support empty input.

     Check all answers on Stack Overflow

     3/5

   • RegExp : At least 10 characters, with 1 upper case letter, with one lower case letter and or 1 special character or number)

     Top Answer

     Answered Jun 13, 2016 · 1 votes

     You're almost there. Just move your special characters into the same group of characters as the numbers, like below:

     ^(?=.*?[A-Z])(?=.*?[a-z])(?=.*?[0-9#?!@$%^&*-]).{10,}$-

     Check all answers on Stack Overflow

     4/5

   • Regex that contains at least 1 uppercase, lowercase, numbers, 8 characteres, special character and DOES NOT CONTAIN WHITESPACE

     Top Answer

     Answered Jul 28, 2023 · 1 votes

     To match a string that contains at least one uppercase letter, one lowercase letter, one number, one special character, is at least 8 characters long, and does not contain any whitespace, you could use a regex pattern with lookaheads to verify each of these requirements. Here's how it could look:

     regex: ^(?=.*[A-Z])(?=.*[a-z])(?=.*\d)(?=.*[\W])(?!.*\s).{8,}$

     Here's how it works:

     ^ asserts the start of the string.

     (?=.*[A-Z]) requires at least one uppercase letter.

     (?=.*[a-z]) requires at least one lowercase letter.

     (?=.*\d) requires at least one number.

     (?=.*[\W]) requires at least one non-word character (special characters).

     (?!.*\s) asserts that no whitespace characters are allowed.

     .{8,} requires at least 8 characters in total.

     $ asserts the end of the string.

     The .* inside the lookaheads (?=...) and (?!...) allows for any characters (or no characters at all) to appear before the required or disallowed characters. The . matches any character except for a newline, and the * quantifier allows this to be repeated any number of times, including zero times.

     Remember, regular expressions can vary between programming languages and environments, so you may need to adjust this for your specific use case. This regular expression pattern should work in most common languages and environments, like JavaScript, Python, Java, and more.

     Check all answers on Stack Overflow

     5/5

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2. passwords-generator.orgPassword Generator - Strong Password Generator

   passwords-generator.org

   • Cached

   Contains at least 1 upper case letter - a strong password should contain at least 1 upper case letter, preferably a few more. Contains at least 1 lowercase letter - at least one lowercase letter is needed in a secure password. Contains at least 1 special symbol - special characters are highly recommended in a strong and secure password. You ...

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     If you need more than 10,000 passwords (which are already...

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     A strong password should consist lowercase and uppercase...

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     The encoded string is not crackable unless the original...

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     If you pay for the whole year, it would be $60 per year....

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3. stackoverflow.com › questions › 43127814RegEx for at least 1 number, 1 lower case and 1 upper case letter

   stackoverflow.com › questions › 43127814

   • Cached

   Mar 30, 2017 · (?=.*\d) - 1 digit after any 0+ chars from the current position is required (?=.*[a-z]) - 1 lowercase letter after any 0+ chars from the current position is required (?=.*[A-Z]) - 1 uppercase letter after any 0+ chars from the current position is required.* - any 0 or more chars) - end of the non-capturing group $ - end of string.

4. passwordsgenerator.netStrong Random Password Generator

   passwordsgenerator.net

   • Cached

   Use a password that has at least 16 characters, use at least one number, one uppercase letter, one lowercase letter and one special symbol. 3. Do not use the names of your families, friends or pets in your passwords.

5. www.omnicalculator.com › statistics › passwordPassword Combination Calculator

   www.omnicalculator.com › statistics › password

   • Cached

   Jan 18, 2024 · The answer is (26+26)^ {10} (26+ 26)10. If we need to have at least one uppercase letter (and, of course, at least one lowercase letter), we need to subtract from these permutations the ones that contain only lowercase letters and those with only uppercase letters.

6. unix.stackexchange.com › questions › 391866Regex for Password. Restricting Special Characters

   unix.stackexchange.com › questions › 391866

   • Cached

   Sep 13, 2017 · This informs that there should be at least one lower and upper case along with one numerical digit. Also, restricts the special character set to [#@$?] What I observed was that any special character if it were the last one was allowed. Anywhere else it was disallowed as expected. Thus, Hello*E1 is disallowed but HelloE1* was allowed.

7. www.the-art-of-web.com › javascript › validate-passwordPassword Validation using regular expressions and HTML5 ...

   www.the-art-of-web.com › javascript › validate-password

   • Cached

   Apr 3, 2018 · <script> function checkPassword(str) { // at least one number, one lowercase and one uppercase letter // at least six characters that are letters, numbers or the underscore var re = /^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]) \w {6,}$/; return re.test(str); } </script> The \w is shorthand for 'any letter, number or the underscore character'.

8. www.w3schools.com › howto › howto_js_passwordHow To Create a Password Validation Form - W3Schools

   www.w3schools.com › howto › howto_js_password

   • Cached

   <p id="capital" class="invalid"> A capital (uppercase) </b> letter </p> <p id="number" class="invalid"> A number </p> <p id="length" class="invalid"> Minimum 8 characters </p> </div>