I have the following regex that I'm trying to ONLY allow numbers like:

1, 2, 3, 10, 11, 24 etc

and NOT 0, 01, etc

if (!$(this).text().match(/^[1-9][0-9]/g)) {


}

Is this correct? As it doesn't allow numbers like 1, 2, 3 but is 11, 12 etc

I have the following regex that I'm trying to ONLY allow numbers like:

1, 2, 3, 10, 11, 24 etc

and NOT 0, 01, etc

if (!$(this).text().match(/^[1-9][0-9]/g)) {


}

Is this correct? As it doesn't allow numbers like 1, 2, 3 but is 11, 12 etc

• javascript
• regex

• 1 Can you not just check whether the first character is 0? Or do you need to allow 0.5, etc? – Andrzej Doyle Commented Jun 25, 2013 at 9:17
• would running parseInt( $(this).text(), 10 ) solve your problem? – Andy Ray Commented Jun 25, 2013 at 9:18
• @AndrzejDoyle No only whole numbers, so checking for leading zero would work – Cameron Commented Jun 25, 2013 at 9:19
• Should 230345734872590343598340952342342483485 match? – georg Commented Jun 25, 2013 at 9:31

2 Answers 2

You need to specify a * after second [0-9] to match zero or more digits. In addition to one digit numbers, this will also fail to match more than two digit numbers. Correct regular expression is ^[1-9][0-9]*.

Try using Replace ()

if (!$(this).text().replace(/^(-?)0+/,'').match(/[1-9]?[0-9]*/))