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Regex to accept 7 to 10 digit number with dashes in between the number [closed]

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I would need help on regex for accepting any 7 digit to 10 digit number (no decimals) along with hyphen or spaces in between any where in the digit.
For example ,
Below are valid scenarios
0123456789
000-25-392-93
0-1-2-3-4-5-6-7-8-9
0 1-2 3-4 5-6 7
Could some be able provide the best regex to accept this ?

Try this regex:
^\d(?:[- ]*\d){6,9}$
^\d starting with a digit.
(?:[- ]*\d){6,9} followed by another digit with any amount of - or whitespaces inbetween, repeat 6 to 9 times, so 7 to 10 digits in total.
$ end of string.
See the test case
const texts = [
'0123456789',
'000-25-392-93',
'0-1-2-3-4-5-6-7-8-9',
'0 1-2 3-4 5-6 7'
];
const regex = /^\d(?:[- ]*\d){6,9}$/;
console.log(texts.map(text => regex.test(text)));

^(?:\d[- ]?){7,10}$ could also work.
\d for the digit.
[- ] for the character after the number
? for checking if there is one space or - after the last number
{7,10} checks if it is between 7 and 10
Try it out:
https://regex101.com/r/Yx7iQ8/1

Here is one way to do that.
const numbers = [
"0123456789",
"000-25-392-93",
"0-1-2-3-4-5-6-7-8-9",
"0 1-2 3-4 5-6 7",
"01234" , // not valid
"33300409383850", // not valid
"123abc456def78" // not valid
];
const valid = numbers.filter(num => {
// count numerical digits by stripping out any non numerical characters
//const len = num.replace(/\D/g, "").length; // removes non numerical digits
const len = num.replace(/[\s\-]/g, "").length; // removes dashes and spaces
// now we will only accept elements where their digit count is between 7 and 10
return len > 6 && len < 11;
});
console.log(valid);

How to reject strange numbers and matching phone numbers in regular expression? [closed]

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I've been thinking of using this regex for phone numbers: /(\+\d{1,3})?(\d{9,10})$/
and I want to exclude these weird number patterns, as example the following regular expressions:
longer repeat "123123123": /\b(\d+)\1+\b/
repeat number "111111111": ^(\d)\1+$
I tried with this but i dont have idea of how to combine with the phone number regular expression: ^(\d)(?!\1+$)\d*$

You can use a negative lookahead to exclude all lines matching your forbidden pattern.
^(?!(\d+)\1+$)(\+\d{1,3})?(\d{9,10})$
^ // start of line
(?! // negative lookahead
(\d+)\1+$ // matches repeating groups of numbers
)
(\+\d{1,3})? // optional area code
(\d{9,10}) // phone number
$ // end of line
https://regex101.com/r/gaA9UN/3
Note that single repeated digits are already covered by the repeating groups pattern, since a single digit is recognized as a group of length one.
Update
With the updated requirement to also disallow leading repeating groups followed by non-repeating numbers, here's an updated version:
^(?!(\d{2,})\1+)(?!(\d+)\2{3,})(\+\d{1,3})?(\d{9,10})$
^ // start of line
(?!(\d{3,})\1+) // disallow three or more leading repeating digits
(?!(\d+)\2{3,}) // disallow 1 or 2 leading digits from
// repeating 4 or more times
(\+\d{1,3})? // optional area code
(\d{9,10}) // phone number
$ // end of line
https://regex101.com/r/gaA9UN/4

javascript - mail exchange server string validation using regex [closed]

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how can validate a mx server (similar to a domain) in the form of mx*.m**p.com by Regex? The first star can be any number without its length pre-defined 1, 11, 111, 1111, without leading 0s. The 2nd and 3rd stars are single letters in range of 0-9 and a-Z.
Examples:
mx1.m0bp.com
mx321.maBp.com

^mx[1-9][0-9]*\.m[0-9a-zA-Z]{2}p\.com$
^ indicates the start of the string
mx are the expected characters
[1-9] The number must not have a leading zero, so it must start with 1-9
[0-9]* Followed by zero or more other digits
\. The dot must be escaped as it has a special meaning
[0-9a-zA-Z]{2} Exactly two characters with the given range
p\.com again the next expected characters with another escaped dot
$ indicates the end of the string
Including the ^ and $ means you won't get a match from foomx1.m0bp.com or mx1.m0bp.comfoo

You can use the below regex to test the domain:
mx[0-9]+\.m[0-9a-zA-Z]{2}p\.com
console.log(/mx[0-9]+\.m[0-9a-zA-Z]{2}p\.com/gi.test("mx1.m0bp.com"))
console.log(/mx[0-9]+\.m[0-9a-zA-Z]{2}p\.com/gi.test("mx321.maBp.com"))

How to create a regular expression to accept only upto 12 digits? [duplicate]

This question already has answers here:
6 digits regular expression
(7 answers)
Closed 6 years ago.
How to create a regular expression to accept only upto 12 digits?
Many Thanks

/^\d{0,12}$/
... which breaks down as ...
/ # start regex
^ # anchor to start of string
\d # 0-9
{0,12} # 0-12 times
$ # anchor end of string
/ # end regex

(?:^|[^0-9])([0-9]{1,12})(?![0-9])
I have divided problem to 3 part according to answers.
Problem want to does not start with digit
(?:^|[^0-9]) means that starts with non digit character or does not start with any character
Problem want to consume 12 digit:
[0-9] means that we want to consume just digits
{1,12} means that we want to consume up to 12 character
Problem want to does not consume these 12 digit if 13rd character is digit also.
? means that look but does not consume
![0-9] means that this character could be everything except digit.

RegEx to match only multiples of 5 from 5 up to 150? [closed]

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I don't know how to handle the conditions I have listed below.
I can do one scenario at a time, but not sure how to encompass all restrictions on one field:
Allows 1, 2 or 3 total digits in the field
If user enters only 1 digit
It can only be a 5
If user enters 2 digits
‐ First digit can be 1-9
‐ Second digit can only be 0 or 5
If user enters 3 digits
‐ First digit can only be a 1
‐ Second digit can be 0-5
• If second digit is 0-4, third digit can only be 0 or 5
• If second digit is a 5, third digit can only be 0
Furthermore, if possible:
Each scenario can be followed by the characters .00 or not(the .00 should be optional for entry)

Use the alternation | token and…
You can use the alternation token | in conjunction with beginning ^ and end $ of line tokens to capture 1-, 2-, or 3-digit matches.
You can then optionally match the .00 string with a non-capturing group (?:) and the optional ? token to match zero or one of that group.
Update:
/^5(?:\.00)?$|^[1-9][05](?:\.00)?$|^1[0-4][05](?:\.00)?$|^150(?:\.00)?$/gm
Commenter bobble bubble provided this more concise version.
/^(?:5|[1-9][05]|1[0-4][05]|150)(?:\.00)?$/gm
Source: Regexper.com