RegExp check password 6 chars + 1 number

Question

I know this has been asked a million times, but I just can't seem to crack it.

I have this:

function checkPassword(strPassword)
{
  var objPattern = new RegExp("^.*(?=.{6,})(?=.*[a-z])[a-z0-9]*$");

  var blnResult = objPattern.test(strPassword);
  return(blnResult)
}

...but it only seems to check the length, and not if there's a number?

What have I missed?

Edit:

The number can be anywhere in the string, not necessarily at the end.

You mispositioned the lookaheads, put them right after `^` and decide what you need to match: `.*` or `[a-z0-9]*`. Do you allow any chars or just letters/digits? — Wiktor Stribiżew, Jun 14 '17 at 09:54

score 4 · Accepted Answer · answered Jun 14 '17 at 09:56

4

Keep it simple: if(strPassword.length >= 6 && /\d/.test(strPassword)) will do the work and is way more readable

answered Jun 14 '17 at 09:56

Thomas Ayoub

29,063
15
95
142

You know it might be totally different from what OP needs, right? There are two mutually excluding consuming patterns in OP regex. – Wiktor Stribiżew Jun 14 '17 at 09:57
@WiktorStribiżew if the title is correct (*check password 6 chars + 1 number*) I don't see any issue with the solution I provided. Am I wrong? – Thomas Ayoub Jun 14 '17 at 09:58
1

Nice and simple. Cheers. – ojsglobal Jun 14 '17 at 10:12

cнŝdk · Answer 2 · 2017-06-14T10:09:13.343

You can just include both tests separately in your function:

function checkPassword(strPassword){
  var blnResult = /\w{6,}/.test(strPassword)
   && /\d+/.test(strPassword);
  return(blnResult)
}

Demo:

function checkPassword(strPassword){
  var blnResult = /\w{6,}/.test(strPassword)
   && /\d+/.test(strPassword);
  return(blnResult)
}

var passwords = ["zeaezee2reer", "sds2", "ssdsdsdsdsd", "12155"];
passwords.forEach(function(p){
 console.log(p+" ::: "+ checkPassword(p));
});

score 0 · Answer 3 · answered Jun 14 '17 at 10:05

0

If you need exactly 6 characters plus 1 number then you can use ^[A-z]{6}[0-9]{1}$ or like atleast 6 characters and atleast 1 number then use ^[A-z]{6,}[0-9]{1,}$

answered Jun 14 '17 at 10:05

Arunkumar Kathirvel

224
3
11

RegExp check password 6 chars + 1 number

3 Answers3