CODEWITHSUNDEEP
javascriptregex
Ayha Ayha
Ayha Ayha

Reputation: 9

RexExp min and max

I am trying to validate min 1 and max 59 with the following regexp but not working as expected.

 ^[1-5]?[1-9]$

What is wrong with the expression?

Upvotes: 0

Views: 99

Answers (2)

user2705585
user2705585

Reputation:

Everyone busy trying to provide a solution missed the real question OP asked.

What is wrong with the expression?

Well here is your regex: ^[1-5]?[1-9]$

What you are trying to do is match a number having first digit (optional) in range 1 to 5 and second digit in range 1-9. And since you want to match number from 1 to 59, you will be missing is numbers like 10,20,30,40,50 as pointed out in one comment.

Upvotes: 1

Tuan Ha
Tuan Ha

Reputation: 630

It's work: ^([1-5][0-9]|[1-9])$ (@Tushar)

if (/^([1-5][0-9]|[1-9])$/.test(number)) {
    // Successful match
} else {
    // Match attempt failed
}

The better/faster way (without regex):

function validate(number) {
    number = parseInt(number);
    return number > 0 && number < 60;
}

for (var i = 0; i < 65; i++) {
    console.log(validate(i));
}

Tested:

enter image description here

Upvotes: 2

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